If you're a little unclear as to the function of the panels, here's a bit more explanation. They aren't intended to act as a seal against heated air. They're primarily a radiant barrier. As the metal of the door heats up, that heat radiates from both sides of the door as thermal radiation, primarily in the infrared part of the electromagnetic spectrum. That's what you feel when standing next to the door -- not hot air, but thermal radiation, which is absorbed by your body. It's the same transfer mechanism by which the sun heats the planet across the vacuum of space. Without the barrier, the thermal radiation emits into the shop, where it's absorbed by the floor, the tools, and all the other mass in the shop, heating the whole space and taxing the air conditioner. The radiant barrier instead reflects that radiation back toward the door, where it's re-absorbed by the metal, forcing it to eventually radiate out the other side. Hope that helps! Regarding any air between the door and the panels heating up and circulating, the effect is minimal. As one helpful commenter put it, "Air is actually a pretty poor conductor, and the conversion of radiant heat to convective heat isn’t as substantial as you’d think." Also, why didn't I do something to prevent the sun from hitting the door in the first place? Unfortunately, something like a roll-up shade or an awning (which would have to be pretty big) just isn't practical at the moment, but I may do something like that in the future.
Hi! First time watcher, just glanced at your video history and subbed immediately ^_^ I'm an HVAC engineer. Your basic design, here, is pretty good, but you got a little bit of the physics slightly wonky. You seem like you'd probably be interested, so I thought I'd comment. I'm gonna overexplain a few things that I strongly suspect you (Wesley) already know because you're not the only person who will probably read this: First of all, when you think about insulation, heating, and cooling for a space, if you just think about temperatures, you're not getting the whole picture. Instead, you also wanna be thinking about the *rate* at which heat *moves* from one location to another. "Heat" is a type of energy that gives a substance a "temperature," but they're not the same thing. It can be tough to hold "heat" and "temperature" as different concepts in your head, so here's an example: tinfoil in the oven. Why doesn't tinfoil burn you when you pull it straight out of a hot oven? We know intuitively that, just like everything else in the oven, the tinfoil has to be the same temperature as the inside of the oven to begin with. That's the point of ovens! So, when your delicate, fleshy finger first makes contact with the foil, that foil's *temperature* is as hot as every other metal part inside the oven. The reason your fingers don't burn is that it takes very little *heat* to raise the *temperature* of a thin sheet of aluminum up to oven temperatures - so little heat that, when it all rushes into your finger as the aluminum's temperature equalizes with your body, you barely perceive it as "warm." Despite the layperson-aimed advertising, A/C units don't come in sizes based on "floor area" or "degrees." They come in heat-moving-rate sizes. When you think about this problem with the roll-up door, you don't wanna be thinking "the inside surface of this door gets too hot (temperature) on a hot day, so we should lower that temperature." You want to be thinking "heat moves too quickly through this door on a hot day, so we need to slow down that heat." When the shop heats up in the summer, it's because the walls are letting in heat faster than the A/C can push heat back outside. There are three main types of heat transfer worth talking about here: conductive, convective, and radiant: Conductive heat transfer is when heat is *conducted* through a physical material, or through contact between physical materials. Convective heat transfer is when a liquid or gas moves heat by physically rearranging the hot and cold parts of itself ("flowing") to move heat from one location to another. (You may be familiar with "convection" ovens that distribute heat more evenly by actively circulating the hot air inside.) Radiant heat transfer is kinda like magic; it's where heat energy is kinda "beamed" from one object to another as electromagnetic radiation without really impacting anything in between. It's tempting to think of "radiation" as being "that thing from nukes that'll kill you," but radiation includes all sorts of other phenomena as well: visible light, infrared light, UV light, FM and AM radio waves, WiFi waves, Bluetooth waves, microwaves, and so forth. I think most people would find it uncontroversial - perhaps even intuitively obvious - that heat goes from Hot Things to Cold Things, and not the other way around. It's also relatively intuitive that heat moves faster from a Hot Thing to a Cold Thing when the temperature difference between those two things is bigger. This is true whether we're talking about moving heat through conduction, convection, or radiation. The situation is simplest with conduction; twice as big a temperature difference between the Hot Side and the Cold Side means twice the rate of heat transfer between them. It's allllmost as simple with convection, though there can be some things about the way the liquid or gas moves that can make it not exactly proportional. Radiation is more complicated, but it still follows the basic "heat goes from hot thing to cold thing - bigger temperature difference equals faster heat transfer" rule. (For folks who aren't math-averse, the heat transfer rate is proportional to the difference between the fourth powers of the two temperatures, with both temperatures measured in degrees Kelvin or Rankine, not Fahrenheit or Celsius.) So! With all of that said: If we think about the barrier you've made (leaving out paint and adhesives for simplicity) we've got: outdoors > rollup door > a thin pocket of air > reflective foil surface > foam insulation > wood panel > indoors From an engineering perspective, we'd want to think about what the temperatures will be in between each of these steps, and what types of heat transfer will occur within each of these steps: The first temperature we care about is probably one of the most complicated ones - the temperature at the boundary between "outdoors" and "rollup door." On a hot day, the air might be 108°F, but anybody who's ever bought a windshield sunshade can tell you that the surface of the rollup door will probably be hotter than that if it's in direct sunlight. Most people have some intuitive understanding that, if the door was painted black, it would get hotter than if it was painted white. This is because white paint bounces back more of the sun's radiation in the visible light spectrum, and black paint absorbs more of it. As said in the video, making the door's surface reflective would bounce away even more of the incoming radiation, probably bringing the surface temperature closer to the 108°F "background" temperature of the air around it. Then, as the heat moves through the thin metal material of the rollup door, there would be a small temperature drop to the inside surface of the door. Most metals are so good at conducting heat that the temperature difference between the outside surface and the inside surface probably wouldn't be very big, but there would still be a difference - because, as we know, heat only goes from a (relatively) Hot Thing to a (relatively) Cold Thing. Then we get to the area where your (Wesley's) physics got a little wonky: the part where the heat traverses the thin pocket of air between the inside surface of the door and the reflective foil surface. In this air pocket, the primary form of heat transfer would be *convective* heat transfer. Specifically, the air next to the inside surface of the door would get warmer from that contact and begin to rise, rising until it hits the top of that air pocket, then turning to fall along the reflective foil surface, transferring heat into the foil surface as it goes until it hits the bottom of the air pocket and turns back up to rise, again. Air is a decent thermal insulator, all things considered; thin, sealed, circulating air pockets like this are why double- and triple-paned windows are better insulators than single-pane ones. Regarding your (Wesley's) radiation concept, there would be *some* small amount of heat radiation from the interior surface of the door to the reflective surface opposite, but not a lot. Moreover, the radiative heat transfer between the inside surface of the door and the foil would still go from the Hot Thing to the Cold Thing, overall. The reflectiveness of the foil is basically reducing the smallest piece of the overall heat-transfer-rate pie, there. Then there's the foam insulation and the wood panel. Wood is a better insulator than metal, but it's not great compared to purpose-built insulation foam. Insulation foam is also better than a sealed, thin pocket of circulating air. If you wind up wanting to juice up your design, here, you could do it by laying in another layer of foam of the same thickness. It'd literally be twice as insulating. Meanwhile, if we think about the test rig you built, it goes: outdoors > reflective surface > foam insulation > wood panel > indoors This puts the reflective surface facing the sun. There's a HUGE temperature difference between that sheet of foil and the literal surface of the sun, so making that surface reflective represents a reduction of a bigger piece of the overall heat-transfer-rate pie, compared to the location in the air pocket against the door. This makes the experiment not very representative of the final design. If you wanted a more representative test, you could seal up the outside surface of each of those test boxes with a sheet of metal comparable to that of the roll-up door. All that said, I think this is a great design that's probably going to serve you well, and I love the experimental approach you took for this design. I'm glad I found your channel!
@@brodyjohnstancliff4822 Wow Brodyjohn! That was a paper you wrote there. It was very interesting. Can I ask a silly ? though? If he painted the outside door, let's say chrome, would that be even better than the insulation? Or did I totally screw up what you were saying? I also wanted to say that you definitely have a way with words. Do you write often?
@@tracybowling1156 Well, without running the actual numbers, and without knowing the direction (north/nouth/east/west) the door faces, it's tough for me to say for sure whether just a shiny paint job would be better than just the insulation on the inside, but "both" would definitely be better than just one of the other. (The direction matters because it changes the amount of direct sunlight the door would get on a hot day.) Also, thanks very much for the complement! Explaining engineering stuff to people who aren't engineers is a big part of my day job, so I get a lot of practice. ^_^
for an extra bonus - why not build a narrow pergola over the door on the outside. Louvres angled correctly, or a deciduous vine (grapes etc) will provide added shade in the summer and let sunlight in during winter. Any heat you can stop from hitting the door in the first place would make the insulation barrier work better.
Ain't that just it, we figure out a solution to survive the heat just in time for the weather to drown us instead. Cheers from a fellow survivor of DFW.
You could also put a roll-up blind on the outside of the door so it doesn't get as hot to begin with. There would still be some radiant heat coming through the metal door just with outside air temp alone so these internal panels would help block the majority of that. Another benefit of the outside blind is you can have the roller door up (and panels tucked away) and have a nice shaded view of the outside if the weather isn't too hot. That's if you used a shade-cloth type material for the blind that lets some light through still.
This is a good suggestion and something people don't realize about window blinds. Yes they are blocking the sunlight but they are still letting heat in, because the the sunlight is still heating the blinds which are on the inside. It's much better to shade the window on the outside.
Just wanted to mention that the pink stuff really is genuinely closed cell foam. I was too cheap to buy a new hot tub lid and made a DIY one out of this pink foam. It's going on in 10 years and it's in perfect condition but more impressively it is still virtually weightless. It has not absorbed any water at all and if you've ever owned a hot tub you know that the $600 factory covers end up a hundred pounds after 3 years. Can't recommend it highly enough for that purpose. Originally re-stuffed the original lid but eventually replaced with a one piece attached to plywood with a pulley and LED lighting on the underside. It's actually quite a bit more efficient than the factory cover because I have two layers of foam, one that fits in the cutout and the second layer on top. Makes her a very good seal that doesn't require a straps or anything for wind
As a fellow North Texan who has struggled with this problem all summer (I remember the 108 degree days in July), I used EPS with the radiant barrier with magnets to hold it on... the magnets struggled at best and the tape or glue on the magnets would melt off due to the heat. You just handed me my next shop project with this beautiful solution. Storing the foam sheet when I want to open the doors SUCKS with magnets (10x4 sheets of foam like to blow away). I would buy you a tasty beverage if I bumped into out and about North Texas.
Bonus: The mirrors will allow you to more adequately ponder your relative cuteness vs. Matthias. Great build - love every bit of it! The boop on your lab assistant’s nose was a gem.
Long time viewer and fellow north Texas resident. UA-cam finally started suggesting your videos to me again and I'm so glad. I've binged all the ones I missed over the past few months. I hope to one day have enough money to get one of your signs made. I've always loved the Googie style and need one for our computer shop in a small Texas town. Keep up the good work. Your channel should be over 1 million subs by now, I just don't get the algorithm most of the time.
Great video!!! speaking from experience one thing though you might want to consider painting the outside metal of the door the whitest paint you can find, i know it may seem like the silver metal would reflect a lot and it does compared to black paint but pure white is way better and its comparatively very cheap, as a general rule i find that the harder something is to stare at directly in full sun the less it's going to heat up. It's actually ridiculously amazing how much less heat something by being completely white, if everybody painted their roofs white so much energy would be saved in AC.
I live in Hurst and have done nearly the same in my garage. Thankfully I have an east facing garage door, but it doesn't matter much, as I go multiple clothes changed a day when I'm working out there. A window unit in the wall helped a lot!
I have an issue in my bedroom with my wall facing full sun most of the day. Can I do this in my bedroom wall? I don’t mind putting it on top of the wall do you think that might help? The room gets incredibly hot and I have to use a window unit in addition to my central air because of course this is the room I sleep in and I can’t change it for another it’s the largest one
@@sharonnewmanehrlich7203 you mean a window unit in the wall? I should of clarified, I put it in an unused door. If you want to put an a/c in that room, I'd recommend a mini-split. That would keep the room as cold as you wanted. Otherwise if you want to cool the room, the only solution is shade, heat reflection paint outside or more insulation...
This was a super satisfying/inspiring video for anyone trying to get a workshop together! Love the "numbered objectives" format, thank you for another great video!
I just installed one of those pink fiberglass insulation panel kits on my garage door. I was disappointed in what little difference it made. You have given me new inspiration and hope for a cooler garage! Great video as always!
Thanks! One video I watched recommended foil-covered panels that fit in the spaces in the garage door, with the foil toward the door, but big enough that they curve out away from the door to create the necessary air gap.
Great idea and execution. Gonna find a way to add this to our new house. What I would add to this is a screen for hot but windy days to prevent bugs coming in. A shade or carport to shade the door. Trees or tall bushes to shade the driveway, house, or door. Make the barrier a roll down to save space.
wesley you are a very smart guy, it is a pleasure to watch you solve a problem using science. like you did with your loft lift . you make great videos that people can really get something out of and fallow along. there a lot of videos on youtube were people buy and not make things that they say they did make, then try to show you some thing about it and how to use it when they don't know them selves. it becomes a waste of time and an insult to your intelligence. please keep making your great videos mr wesley
If you make shroud around the door including the drum (it would need to project further from the drum) and add doors ti the shop side, you can get a better containment of the heat. This also creates a plenum, which you can then exhast to the outside further increasing the thermal preformance.
Long Island, New York, late summer: 100°temp, 100° humidity but no rain. Suddenly the clouds roll in the air turns greenish. Then . . . FLASH BOOM All heaven's buckets empty at once and AAAAH ! Finally, a cool breeze.
Very nicely done! The other problem with using magnets is that if they get hot enough they lose their magnetic properties until they cool - which is used in rice cookers
I love the knowledge and the information you put into your, useful, videos. Thank you and I wish I was your neighbor so I could work with you on your projects.
Just a curtain outside with two of the Harbour Freight 10 x 8 black shade tarps using a rope or cable as a curtain rod between a couple cleats or brackets will cut the temperature on the outside of the door substantially. The shade tarps are grommeted already and relatively cheap and durable, just add some magnets to the bottom if desired but they let plent of air through and work great as ac unit shades also. If Im the hundredth person to say this stuff then disregard this comment. Enjoying your videos though.
What a great build--the change in temp is certainly very much appreciated. The folding screen will probably also help keep the heat INSIDE during the colder winter months. [not sure why some people think the space-saving ship's stairs (or ladder) you built are especially hazardous--they've been in use for decades]
My garage door faces west and I can't work in my garage shop with outside temps around 106 here in Austin. Very informative and entertaining. I enjoy the jokes as we seem to have similar tastes in humor. I'll check out dune more if your videos.
I too live in north Texas. I work out of my garage with the metal door facing north west and my exterior wall getting a FULL western facing brick. Plus, since I live on a cul-de-sac that gets LOTS of sun. Thanks for the video. I've also become a fan to the brand AtticFoil so I'll be mixing their product with your results.
A couple of the links in the video description are videos by AtticFoil. They do a great job of explaining the effectiveness of a radiant barrier and the need for an air gap.
The bubble wrap style is useful for odd shaped areas. I used it on my bedroom window because I’m last in line for the AC and my room faces south. It used to get crazy hot in here as we have no yard shade and i can’t fix anything, rental. I used a sheet along with some duct tape (for it’s heat resistance) and closed off my window. That plus some thick curtains cooled my room by probably 20F in the hottest part of the day. Bonus it made it pitch black in here at night which is nice for sleeping. Bonus anyone looking from outside thinks I’m some weird UFO conspiracy nut or have a meth lab in here lol.
If you have a window that has sealed gas inside it, it can pop the seals and void your warranty if there is one. I used tint on my window and it mentioned it could but as it was western window in florida with no shade from about 12 til sunset it had long ago leaked out.
Beautiful door, going to remember this if we ever move to a place with giant floor to ceiling windows... Those types of stairs are extremely common in the Netherlands - they don't seem to have a higher death rate as a result of this....
That was a great way to sneak that "SUBSCRIBE" reminder in there. And me mentioning it in the comments is a sneaky way to remind people they need to subscribe. 😁
If you could rig up a water spray/mist line to spray the outside of the door every few minutes/a few times per hour, You would remove a lot of heat from the door due to evaporation. It would drop the temperature of the door quite significantly.
I have this exact same issue in my shop. I had the same idea you had, but first I was going to hang a light colored drop cloth on the outside like a shower curtain that slides to the side to open the door. My door is dark green so the lighter color would make a big difference.
I believe the silver stuff needs an air space on the hot side to be most effeective. A permanent cloud or awning outside over the door would be very effective.
NASA uses multi-layer insulation. The new Webb space telescope uses 5 layers of mylar, separated by a foot or so of vacuum. Each layer gets them down almost 100 degrees C. If you had the ability to space out the mylar sheeting or put in multiple layers, you'd get even better effectiveness. It would be really interesting if you could build another set of these and put them on the OUTSIDE of the structure, and reflect the sunlight before it gets to the metal. Really interesting project!
Aw this video landed at exactly the right moment :) Currently looking at insulating a 14 sq ft roof and weighing up the options. Foil backed foam held a few inches below the roof surface (single thickness of 1950s 'cement with mineral fibre' corrugated roofing) held in place by batons attached to the roof trusses currently looking like the preferred option. Your immense door panels reminded me of the sort of stage flats my dad built in the 60's, especially when you added the huge stars :) Fab!!
@@sgsax yup, those are Hollywood (aka Studio) flats alright! I was laughing my arse off at that fact when @Wesley Treat read the stickers from the Luan maker about which side was the front as that is super important when making a flat. Seeing his degree comment above (I have a tech theatre degree too!) explains why he found it just as funny. :)
The bubble wrap version is good because it can also work as a teeny tiny little area for moisture to wick/vent on moist areas, and it kind of 'forces' that 'radiant barrier' gap that is really quite significant in how well it works. Remember: When you are talking about insulation, we are always referring to how much BETTER things are compared to LITERALLY NOTHING. Air is a pretty good insulator, if you keep it from moving around. That is 99.99% of what all insulation is actually doing: Stopping the air molecules from being able to so easily flow and set up convection. Your "R13' on the fiberglass/rockwool insulation? Yeah, that is 13 INCHES of dead space and air. That is what that number means. The 2" thick rockwool that is R13 means that you get to NOT have 11" of extra thickness of wall.
You should paint the outside of the door white,you would reflect a lot of heat. A white blackout outside curtain,would also do a lot to lower temps on the door. The point is to not get steel to warm up,not so much to avoid it to transmit its heat to the inside.
The door was already white as far as I could tell. He also mentioned that in the video. But regardless, it’s a good point in general. However anyone following your suggestion may be disappointed with the result, given it’s still going to be pretty unbearable inside the shop once the white door has absorbed all the heat possible
@@cpzmelbs "bare steel door" is what the says. How can the door can heat up if it's in the shadow of an exterior curtain ? It will be at ambient temperature,not more. That's is what shadow is doing,avoiding heat to be absorbed.
Great video and your 100% on the science which I love to see. I appreciate that you actually did some research on the subject. My garage door is insulated BUT the manufacturer didn't leave an air gap. Instead they just glued foam insulation too the door which experienced direct sun for most of the day. It's usually only a few degrees cooler in the garage than outside. At least it's not in the sun 🤣 I laugh because otherwise I'll cry. Also because of local building codes, builders here so not insulate the walls not facing the living space or above garages so insulating the door doesn't have a huge effect. They save about $100 on insulation (they but I'm bulk) and our cars, tools, things and ourselves suffer 🥺
It’s crazy that that cnc machine is only $10K. Back in the early 2000s the cabinetry shop I worked at purchased a cnc machine that could do 4x8 plywood boards. It cost the shop owner over $100K, it because of it we were able to get into woodworking magazine’s top ten fastest growing woodworking companies in America.
If u add the strips with the the bubble wrap it will take it from r6 to r8. Good luck with the heat. Also think about flipping the unit if you all have another hard winter to keep the heat in as well.
LOL my Galvo iron workshop here in Oz gets a bit hot as well. In Summer it gets between 50 to 60C in there even with the doors open and the pedestal fans running. In your scale that is 122 to 140. I haven't bothered with insulating, it is easier to just go fishing and wait for the evening to get the jobs done.
"If you're watching this from the future, it was only 108 today" Scientific American ran an article last week: "This Hot Summer Is One of the Coolest of the Rest of Our Lives" Greetings from Arkansas. I'm JUST starting the video, but I'm already thinking a really simple solution: A heavy black plastic screen with maybe a pole through it at the bottom that you can raise and lower on the outside of the door. It wouldn't have to have rigid sides. Just something to keep the bottom laying flat, though it would be problematic in wind. You could secure it to the ground with stakes and some short elastic lines attached to the pole on the screen. We recently discovered that heavy screen can block a ton of heat if it's outside the window. We've got a bunch of west-facing windows and we're building frames for screens to cover the windows and putting a heavy screen on. We can see through it fine, but it cuts down the heat by a HUGE factor. I was blown away by the difference. We put it up half-way over a window and where the screen is vs. where the screen isn't is, well, night and day. Huge temperature difference. And with the screen outside, the heat it blocks never gets inside. We have a standard residential garage door. I know they sell insulation panels for it, but we're cheap. My wife found a company that had just received a bunch of large items and had large sheets of ~1/2" styrofoam to give away. So she loaded up her minivan and brought it home and cut it to fit in the garage door. Made a HUGE difference. You could stand in front of panels that had the insulation and panels that didn't and man, again, night & day...
I have that same door and in north Texas too. I used 4x8x3/4" foam board with the foil and taped them together similar to how you did yours. It does make a HUGE difference. I used a FLIR camera and it was very easy to visualize the temperatures.
One of my previous houses, I had the big glass sliding doors that would get BAKED for 6 hours a day in the summer sun. It was brutal and the inside was so hot it hurt to touch them. You know the deal. Since I was renting, I had to go for the minimal solution. I tried the tinfoil trick, but that just led to hot tinfoil. Instead, I draped a tarp over the OUTSIDE of the window to keep the sunlight from even getting to the glass. The difference was amazing. I'll bet if you worked out something to hang a large tarp on the outside of the door that you would see even more heat protection!
Your previous problem was due to conductive heat. You needed an air gap between the hot glass and the foil. If the foil is touching the hot surface, then the foil heats up. You were no longer combating radiant heat, just creating a different source of radiant heat. The videos I reference in the video description explain this. It works better with a double-pane window, where the inner pane is not heating up. 👍 Blocking the light from hitting the door would add improvement, though, that's correct. I just haven't come up with a way to do that for such a big door, at least not a way that I find practical and convenient.
@@WesleyTreat Blocking the sun from hitting your roll-up door will make a *HUGE* improvement!!! This will be the largest improvement you could possibly make. Just lean a piece of scrap plywood against the outside of the roll-up door to partially shade it and see just how hot the interior door metal is that is in full sun compared to the area shaded by the plywood! Then make a similar apparatus as the one you designed for your interior seamless paper photo backgrounds. But instead use outdoor garden shade cloth or awning material (like retractable Motorhome & Outdoor Patio Awning material) in place of the seamlesss background photo paper. You should also make your pulley or cog wheels out of UV stable and weatherproof "King Starboard", Blown PVC (Sintra), or HDPE/UHMW plastic sheet which can also be cut on your CNC. Space the shade cloth/awning material 4"-6" off of the outer door surface for that air gap. Install heavy duty tarp grommets with reinforcement gussets at the bottom corners of the roll-down shade material or add the "pipe pocket" to the bottom as you did with your seamless paper background. Add some eyebolts at the base in the concrete pad or to the lower building structure that are spaced about 6"-8" wider on each side than the width of the shade cloth. Use two heavy duty trampoline springs from the perimeter of a large recreational outdoor trampoline to attach the shade cloth's bottom corner grommets to the base eye bolts. You can buy single or multiple trampoline replacement springs on Amazon. Search Amazon for "Trampoline Springs" and the Internet for "UV Stable Awning Fabric". The other thing to do is to paint the exterior of the roll-up door with RV Thermal Roof Coating/Sealer. There are several brands of this white "Heat Shield" or "Thermal Barrier" elastomer paint that is made to seal and coat the roofs of RVs/Motorhomes/Travel Trailer Campers. The paint has glass or polycarbonate microspherals encapsulated in the paint to aid in thermal insulation while the paint itself reflects thermal energy and it is elastomer which allows it to stretch or expand & contract without cracking or flaking. While I'm building my new house, my temporary workshop is in a high-cube 40ft steel shipping container, and painting the roof and the southern exposure side with this paint made a HUGE difference to the interior temperature! But the single most effective way to reduce the heat gain and radiation of the roll-up door would be to shade it from the sun on the outside! I used large white tarps with an air gap to shade the shipping container and the difference is literally Night & Day.
@Wesley Treat @BadWithComputer Yes, that would be the absolute most effective way to reduce the thermal gain. 👍 In addition, there are several brands of white "Heat Shield" or "Thermal Barrier" paint that is made to seal and coat the roofs of RVs/Motorhomes/Travel Trailer Campers. The paint has glass or polycarbonate microspherals encapsulated in the paint to aid in thermal insulation while the paint itself reflects thermal energy. While I'm building my new house, my workshop is in a high-cube 40ft steel shipping container, and painting the roof and the southern exposure side with this paint made a HUGE difference to the interior temperature!
back when we had to move a bunch of people into the garage so we could space work places out for the rona, we had to deal with the heat coming off 2 metal roll up doors that are 20 feet tall. we hung some mesh landscape matting on the outside of the doors to create a bit of a shadow on them using giant puck magnets that we hooked through the eyelets so it was easy to pull back if we needed to open them for some reason. and it cooled the garage down easily 25 degrees. I like your solution as well, but we wouldn't have space for something like this.
I considered something similar, but I'm not always there and the first storm would destroy something outside. I might consider it next year and just hang it on the hottest days.
If you're a little unclear as to the function of the panels, here's a bit more explanation. They aren't intended to act as a seal against heated air. They're primarily a radiant barrier.
As the metal of the door heats up, that heat radiates from both sides of the door as thermal radiation, primarily in the infrared part of the electromagnetic spectrum. That's what you feel when standing next to the door -- not hot air, but thermal radiation, which is absorbed by your body. It's the same transfer mechanism by which the sun heats the planet across the vacuum of space.
Without the barrier, the thermal radiation emits into the shop, where it's absorbed by the floor, the tools, and all the other mass in the shop, heating the whole space and taxing the air conditioner. The radiant barrier instead reflects that radiation back toward the door, where it's re-absorbed by the metal, forcing it to eventually radiate out the other side. Hope that helps!
Regarding any air between the door and the panels heating up and circulating, the effect is minimal. As one helpful commenter put it, "Air is actually a pretty poor conductor, and the conversion of radiant heat to convective heat isn’t as substantial as you’d think."
Also, why didn't I do something to prevent the sun from hitting the door in the first place? Unfortunately, something like a roll-up shade or an awning (which would have to be pretty big) just isn't practical at the moment, but I may do something like that in the future.
Wow! Smarty-pants! What an excellent explanation. 😀
A double door !!! ( a soft insulating mat like waterproof cladding on the outside of the garage door !!! ) I am a retired sound engineer.
Hi! First time watcher, just glanced at your video history and subbed immediately ^_^
I'm an HVAC engineer. Your basic design, here, is pretty good, but you got a little bit of the physics slightly wonky. You seem like you'd probably be interested, so I thought I'd comment. I'm gonna overexplain a few things that I strongly suspect you (Wesley) already know because you're not the only person who will probably read this:
First of all, when you think about insulation, heating, and cooling for a space, if you just think about temperatures, you're not getting the whole picture. Instead, you also wanna be thinking about the *rate* at which heat *moves* from one location to another. "Heat" is a type of energy that gives a substance a "temperature," but they're not the same thing. It can be tough to hold "heat" and "temperature" as different concepts in your head, so here's an example: tinfoil in the oven. Why doesn't tinfoil burn you when you pull it straight out of a hot oven? We know intuitively that, just like everything else in the oven, the tinfoil has to be the same temperature as the inside of the oven to begin with. That's the point of ovens! So, when your delicate, fleshy finger first makes contact with the foil, that foil's *temperature* is as hot as every other metal part inside the oven. The reason your fingers don't burn is that it takes very little *heat* to raise the *temperature* of a thin sheet of aluminum up to oven temperatures - so little heat that, when it all rushes into your finger as the aluminum's temperature equalizes with your body, you barely perceive it as "warm."
Despite the layperson-aimed advertising, A/C units don't come in sizes based on "floor area" or "degrees." They come in heat-moving-rate sizes. When you think about this problem with the roll-up door, you don't wanna be thinking "the inside surface of this door gets too hot (temperature) on a hot day, so we should lower that temperature." You want to be thinking "heat moves too quickly through this door on a hot day, so we need to slow down that heat." When the shop heats up in the summer, it's because the walls are letting in heat faster than the A/C can push heat back outside.
There are three main types of heat transfer worth talking about here: conductive, convective, and radiant:
Conductive heat transfer is when heat is *conducted* through a physical material, or through contact between physical materials.
Convective heat transfer is when a liquid or gas moves heat by physically rearranging the hot and cold parts of itself ("flowing") to move heat from one location to another. (You may be familiar with "convection" ovens that distribute heat more evenly by actively circulating the hot air inside.)
Radiant heat transfer is kinda like magic; it's where heat energy is kinda "beamed" from one object to another as electromagnetic radiation without really impacting anything in between. It's tempting to think of "radiation" as being "that thing from nukes that'll kill you," but radiation includes all sorts of other phenomena as well: visible light, infrared light, UV light, FM and AM radio waves, WiFi waves, Bluetooth waves, microwaves, and so forth.
I think most people would find it uncontroversial - perhaps even intuitively obvious - that heat goes from Hot Things to Cold Things, and not the other way around. It's also relatively intuitive that heat moves faster from a Hot Thing to a Cold Thing when the temperature difference between those two things is bigger. This is true whether we're talking about moving heat through conduction, convection, or radiation. The situation is simplest with conduction; twice as big a temperature difference between the Hot Side and the Cold Side means twice the rate of heat transfer between them. It's allllmost as simple with convection, though there can be some things about the way the liquid or gas moves that can make it not exactly proportional. Radiation is more complicated, but it still follows the basic "heat goes from hot thing to cold thing - bigger temperature difference equals faster heat transfer" rule. (For folks who aren't math-averse, the heat transfer rate is proportional to the difference between the fourth powers of the two temperatures, with both temperatures measured in degrees Kelvin or Rankine, not Fahrenheit or Celsius.)
So! With all of that said:
If we think about the barrier you've made (leaving out paint and adhesives for simplicity) we've got:
outdoors > rollup door > a thin pocket of air > reflective foil surface > foam insulation > wood panel > indoors
From an engineering perspective, we'd want to think about what the temperatures will be in between each of these steps, and what types of heat transfer will occur within each of these steps:
The first temperature we care about is probably one of the most complicated ones - the temperature at the boundary between "outdoors" and "rollup door." On a hot day, the air might be 108°F, but anybody who's ever bought a windshield sunshade can tell you that the surface of the rollup door will probably be hotter than that if it's in direct sunlight. Most people have some intuitive understanding that, if the door was painted black, it would get hotter than if it was painted white. This is because white paint bounces back more of the sun's radiation in the visible light spectrum, and black paint absorbs more of it. As said in the video, making the door's surface reflective would bounce away even more of the incoming radiation, probably bringing the surface temperature closer to the 108°F "background" temperature of the air around it.
Then, as the heat moves through the thin metal material of the rollup door, there would be a small temperature drop to the inside surface of the door. Most metals are so good at conducting heat that the temperature difference between the outside surface and the inside surface probably wouldn't be very big, but there would still be a difference - because, as we know, heat only goes from a (relatively) Hot Thing to a (relatively) Cold Thing.
Then we get to the area where your (Wesley's) physics got a little wonky: the part where the heat traverses the thin pocket of air between the inside surface of the door and the reflective foil surface. In this air pocket, the primary form of heat transfer would be *convective* heat transfer. Specifically, the air next to the inside surface of the door would get warmer from that contact and begin to rise, rising until it hits the top of that air pocket, then turning to fall along the reflective foil surface, transferring heat into the foil surface as it goes until it hits the bottom of the air pocket and turns back up to rise, again. Air is a decent thermal insulator, all things considered; thin, sealed, circulating air pockets like this are why double- and triple-paned windows are better insulators than single-pane ones. Regarding your (Wesley's) radiation concept, there would be *some* small amount of heat radiation from the interior surface of the door to the reflective surface opposite, but not a lot. Moreover, the radiative heat transfer between the inside surface of the door and the foil would still go from the Hot Thing to the Cold Thing, overall. The reflectiveness of the foil is basically reducing the smallest piece of the overall heat-transfer-rate pie, there.
Then there's the foam insulation and the wood panel. Wood is a better insulator than metal, but it's not great compared to purpose-built insulation foam. Insulation foam is also better than a sealed, thin pocket of circulating air. If you wind up wanting to juice up your design, here, you could do it by laying in another layer of foam of the same thickness. It'd literally be twice as insulating.
Meanwhile, if we think about the test rig you built, it goes:
outdoors > reflective surface > foam insulation > wood panel > indoors
This puts the reflective surface facing the sun. There's a HUGE temperature difference between that sheet of foil and the literal surface of the sun, so making that surface reflective represents a reduction of a bigger piece of the overall heat-transfer-rate pie, compared to the location in the air pocket against the door. This makes the experiment not very representative of the final design. If you wanted a more representative test, you could seal up the outside surface of each of those test boxes with a sheet of metal comparable to that of the roll-up door.
All that said, I think this is a great design that's probably going to serve you well, and I love the experimental approach you took for this design. I'm glad I found your channel!
@@brodyjohnstancliff4822 Wow Brodyjohn! That was a paper you wrote there. It was very interesting. Can I ask a silly ? though? If he painted the outside door, let's say chrome, would that be even better than the insulation? Or did I totally screw up what you were saying? I also wanted to say that you definitely have a way with words. Do you write often?
@@tracybowling1156 Well, without running the actual numbers, and without knowing the direction (north/nouth/east/west) the door faces, it's tough for me to say for sure whether just a shiny paint job would be better than just the insulation on the inside, but "both" would definitely be better than just one of the other. (The direction matters because it changes the amount of direct sunlight the door would get on a hot day.) Also, thanks very much for the complement! Explaining engineering stuff to people who aren't engineers is a big part of my day job, so I get a lot of practice. ^_^
That little "I hope this thing stays put long enough for me to grab that tool" thing had me rolling. Totally something I do.
did you see his subscribe tattoo around his waist?
The stare down just before that moment... intimidating the part into stillness.
Mad props to your tattoo artist. very clean lines and A+ placement
I am confused, did I miss the tattoo?
I gather that I was distracted and missed a moment of clever editing, so I guess I just have to watch the whole video again. Oh well 😉
23:55
22:21 "...warms it up a little in here." LOL, I ℃ what you did there.
I was embarrassed I didn't catch my wording till editing. 🤷♂️
I was wondering if that was intentional, but he's too much of a Dad to just not acknowledge a good pun on camera.
@@nefariousyawn It's true
for an extra bonus - why not build a narrow pergola over the door on the outside. Louvres angled correctly, or a deciduous vine (grapes etc) will provide added shade in the summer and let sunlight in during winter. Any heat you can stop from hitting the door in the first place would make the insulation barrier work better.
And you could make wine with the grapes😊
Even an old school roll-up bamboo screen that shades the outside of the door to reduce the heat gain on the outside would make a big difference.
Love the irony of “The wood warms it up in here” 🤣
Ain't that just it, we figure out a solution to survive the heat just in time for the weather to drown us instead.
Cheers from a fellow survivor of DFW.
I can hear Thomas Dolby singing: "HE BLINDED ME WITH SCIENCE!"
I miss the table saw that made the Jetson noises
Huzzah for data! Also loved the moment of "clamp just out of reach, panel standing for now, I can grab it.... this will be fine..... YOINK!"
You could also put a roll-up blind on the outside of the door so it doesn't get as hot to begin with. There would still be some radiant heat coming through the metal door just with outside air temp alone so these internal panels would help block the majority of that.
Another benefit of the outside blind is you can have the roller door up (and panels tucked away) and have a nice shaded view of the outside if the weather isn't too hot. That's if you used a shade-cloth type material for the blind that lets some light through still.
This is a good suggestion and something people don't realize about window blinds. Yes they are blocking the sunlight but they are still letting heat in, because the the sunlight is still heating the blinds which are on the inside. It's much better to shade the window on the outside.
Glad you mentioned the air gap requirement for the radiant barrier.
Very nice solution and it is a nice backdrop for taking photos or videos.
Nice! Getting a bowling alley vibe from those stars!
Just wanted to mention that the pink stuff really is genuinely closed cell foam. I was too cheap to buy a new hot tub lid and made a DIY one out of this pink foam. It's going on in 10 years and it's in perfect condition but more impressively it is still virtually weightless. It has not absorbed any water at all and if you've ever owned a hot tub you know that the $600 factory covers end up a hundred pounds after 3 years. Can't recommend it highly enough for that purpose. Originally re-stuffed the original lid but eventually replaced with a one piece attached to plywood with a pulley and LED lighting on the underside. It's actually quite a bit more efficient than the factory cover because I have two layers of foam, one that fits in the cutout and the second layer on top. Makes her a very good seal that doesn't require a straps or anything for wind
neat idea :)
As a fellow North Texan who has struggled with this problem all summer (I remember the 108 degree days in July), I used EPS with the radiant barrier with magnets to hold it on... the magnets struggled at best and the tape or glue on the magnets would melt off due to the heat. You just handed me my next shop project with this beautiful solution. Storing the foam sheet when I want to open the doors SUCKS with magnets (10x4 sheets of foam like to blow away). I would buy you a tasty beverage if I bumped into out and about North Texas.
Multiple Wesleys! That’s definitely a score on the ‘cool points’ chart.
Glad you went with the 1", it'll help during the summer *and* winter when the texan electrical grid fails :D
Fellow North Texan here, this is a great idea! Keep up the great work!
Thanks!
14:55 was my favorite part, beside the testing phase. lol
Bonus: The mirrors will allow you to more adequately ponder your relative cuteness vs. Matthias.
Great build - love every bit of it! The boop on your lab assistant’s nose was a gem.
Long time viewer and fellow north Texas resident. UA-cam finally started suggesting your videos to me again and I'm so glad. I've binged all the ones I missed over the past few months. I hope to one day have enough money to get one of your signs made. I've always loved the Googie style and need one for our computer shop in a small Texas town. Keep up the good work. Your channel should be over 1 million subs by now, I just don't get the algorithm most of the time.
Great video!!! speaking from experience one thing though you might want to consider painting the outside metal of the door the whitest paint you can find, i know it may seem like the silver metal would reflect a lot and it does compared to black paint but pure white is way better and its comparatively very cheap, as a general rule i find that the harder something is to stare at directly in full sun the less it's going to heat up. It's actually ridiculously amazing how much less heat something by being completely white, if everybody painted their roofs white so much energy would be saved in AC.
Thank you! The door is already white, though.
Like the star bursts. Kinda that 60s/70s vibe.
I live in Hurst and have done nearly the same in my garage. Thankfully I have an east facing garage door, but it doesn't matter much, as I go multiple clothes changed a day when I'm working out there. A window unit in the wall helped a lot!
I have an issue in my bedroom with my wall facing full sun most of the day. Can I do this in my bedroom wall? I don’t mind putting it on top of the wall do you think that might help? The room gets incredibly hot and I have to use a window unit in addition to my central air because of course this is the room I sleep in and I can’t change it for another it’s the largest one
@@sharonnewmanehrlich7203 you mean a window unit in the wall? I should of clarified, I put it in an unused door. If you want to put an a/c in that room, I'd recommend a mini-split. That would keep the room as cold as you wanted. Otherwise if you want to cool the room, the only solution is shade, heat reflection paint outside or more insulation...
Great solution. Glad you are still alive... Cause I am itching to make one of those staircases!
Thanks for mentioning the air gap on the radiant barrier. That gets missed all the time.
That’s a really clever solution. Great idea!
This was a super satisfying/inspiring video for anyone trying to get a workshop together! Love the "numbered objectives" format, thank you for another great video!
A hanging exterior roof over the metal door will help you to cool a little the workshop. Greetings from Spain.
Did not think I’d watch the full 27 minutes, and yet here I am.
Great vid, great job. Thank you very much for showing us.
I just installed one of those pink fiberglass insulation panel kits on my garage door. I was disappointed in what little difference it made. You have given me new inspiration and hope for a cooler garage! Great video as always!
Thanks! One video I watched recommended foil-covered panels that fit in the spaces in the garage door, with the foil toward the door, but big enough that they curve out away from the door to create the necessary air gap.
In the winter you can lease your workshop as a dance studio during the weekend now that you have a wall of mirrors. 😁
Great idea and execution. Gonna find a way to add this to our new house.
What I would add to this is a screen for hot but windy days to prevent bugs coming in.
A shade or carport to shade the door.
Trees or tall bushes to shade the driveway, house, or door.
Make the barrier a roll down to save space.
Working as a garage door tech for most of my life I know exactly what you mean.
Well done sir! A cool shop is a happy shop!
wesley you are a very smart guy, it is a pleasure to watch you solve a problem using science. like you did with your loft lift . you make great videos that people can really get something out of and fallow along. there a lot of videos on youtube were people buy and not make things that they say they did make, then try to show you some thing about it and how to use it when they don't know them selves. it becomes a waste of time and an insult to your intelligence. please keep making your great videos mr wesley
If you make shroud around the door including the drum (it would need to project further from the drum) and add doors ti the shop side, you can get a better containment of the heat. This also creates a plenum, which you can then exhast to the outside further increasing the thermal preformance.
I think this method will also help insulate your shop from noise emitting from your factory ..... a bonus for the neighbors.
It works a treat! A Wesley Treat!
Bonus huge vanity mirror.
Long Island, New York, late summer: 100°temp, 100° humidity but no rain.
Suddenly the clouds roll in the air turns greenish.
Then . . .
FLASH
BOOM
All heaven's buckets empty at once and
AAAAH !
Finally, a cool breeze.
This is brilliant! I hope other folks with metal roll up doors hear about these.
Very nicely done!
The other problem with using magnets is that if they get hot enough they lose their magnetic properties until they cool - which is used in rice cookers
That "subscribe" tattoo! You are committed!!🤣😆
I feel your pain, I live in San Antonio. This heat is insane
Love watching this guy work.
I love the knowledge and the information you put into your, useful, videos. Thank you and I wish I was your neighbor so I could work with you on your projects.
I was thinking the same thing. That charisma that speaks volumes. And his humour is spot on with mine lol
Just a curtain outside with two of the Harbour Freight 10 x 8 black shade tarps using a rope or cable as a curtain rod between a couple cleats or brackets will cut the temperature on the outside of the door substantially. The shade tarps are grommeted already and relatively cheap and durable, just add some magnets to the bottom if desired but they let plent of air through and work great as ac unit shades also. If Im the hundredth person to say this stuff then disregard this comment. Enjoying your videos though.
Wesley Treat, you give the best science!! 👍
What a great build--the change in temp is certainly very much appreciated. The folding screen will probably also help keep the heat INSIDE during the colder winter months. [not sure why some people think the space-saving ship's stairs (or ladder) you built are especially hazardous--they've been in use for decades]
Just here to feed the algorithm. Lovely finished project!
My garage door faces west and I can't work in my garage shop with outside temps around 106 here in Austin. Very informative and entertaining. I enjoy the jokes as we seem to have similar tastes in humor. I'll check out dune more if your videos.
That foam (Formular ) is highly flammable
I too live in north Texas. I work out of my garage with the metal door facing north west and my exterior wall getting a FULL western facing brick. Plus, since I live on a cul-de-sac that gets LOTS of sun. Thanks for the video. I've also become a fan to the brand AtticFoil so I'll be mixing their product with your results.
A couple of the links in the video description are videos by AtticFoil. They do a great job of explaining the effectiveness of a radiant barrier and the need for an air gap.
The bubble wrap style is useful for odd shaped areas. I used it on my bedroom window because I’m last in line for the AC and my room faces south. It used to get crazy hot in here as we have no yard shade and i can’t fix anything, rental. I used a sheet along with some duct tape (for it’s heat resistance) and closed off my window. That plus some thick curtains cooled my room by probably 20F in the hottest part of the day. Bonus it made it pitch black in here at night which is nice for sleeping.
Bonus anyone looking from outside thinks I’m some weird UFO conspiracy nut or have a meth lab in here lol.
If you have a window that has sealed gas inside it, it can pop the seals and void your warranty if there is one. I used tint on my window and it mentioned it could but as it was western window in florida with no shade from about 12 til sunset it had long ago leaked out.
I do miss the old saw sounds though.
that is a totally beautiful job , start to finish. beautiful and functional .
Beautiful door, going to remember this if we ever move to a place with giant floor to ceiling windows... Those types of stairs are extremely common in the Netherlands - they don't seem to have a higher death rate as a result of this....
I hope those stairs didn't murder you. Great video. Cool doors and science project. Mahalo for sharing! 🙂🐒
Upvote for Matthias…dude digs deep!!
Ever since I almost cut my finger off on a table saw, my heart races when every time I see someone using it.
This project is an excellent reflection of your skills.
That was a great way to sneak that "SUBSCRIBE" reminder in there.
And me mentioning it in the comments is a sneaky way to remind people they need to subscribe.
😁
If you could rig up a water spray/mist line to spray the outside of the door every few minutes/a few times per hour, You would remove a lot of heat from the door due to evaporation. It would drop the temperature of the door quite significantly.
Excellent build, very ingenious, you also now have a triple french folding mirror for the yeti, should he ever stop by!
that looked so gratifying,
I have this exact same issue in my shop. I had the same idea you had, but first I was going to hang a light colored drop cloth on the outside like a shower curtain that slides to the side to open the door. My door is dark green so the lighter color would make a big difference.
I believe the silver stuff needs an air space on the hot side to be most effeective. A permanent cloud or awning outside over the door would be very effective.
There's an air gap between the panels and the door. 👍
You def tested all of your options before building this radiant barrier. The panels look great and certainly function as they were intended to.
Wesley, you are killing it. I've had good luck with rattle paint gradients for signage using Montana cans. Also, you stole my signature move at 15:00
NASA uses multi-layer insulation. The new Webb space telescope uses 5 layers of mylar, separated by a foot or so of vacuum. Each layer gets them down almost 100 degrees C. If you had the ability to space out the mylar sheeting or put in multiple layers, you'd get even better effectiveness. It would be really interesting if you could build another set of these and put them on the OUTSIDE of the structure, and reflect the sunlight before it gets to the metal. Really interesting project!
Nice work, super functional with the classic Wesley Treat style.
its a work of art wesley, beautiful
Aw this video landed at exactly the right moment :)
Currently looking at insulating a 14 sq ft roof and weighing up the options. Foil backed foam held a few inches below the roof surface (single thickness of 1950s 'cement with mineral fibre' corrugated roofing) held in place by batons attached to the roof trusses currently looking like the preferred option.
Your immense door panels reminded me of the sort of stage flats my dad built in the 60's, especially when you added the huge stars :) Fab!!
My degree is in theatre, with a big background in tech. I've built many a flat! 🤓
Was just going to say, this construction reminded me of what I was told were called Hollywood flats. #techiesrule
@@sgsax yup, those are Hollywood (aka Studio) flats alright! I was laughing my arse off at that fact when @Wesley Treat read the stickers from the Luan maker about which side was the front as that is super important when making a flat. Seeing his degree comment above (I have a tech theatre degree too!) explains why he found it just as funny. :)
I need to do the same in my workshop. Great vid!
This is outstanding
The bubble wrap version is good because it can also work as a teeny tiny little area for moisture to wick/vent on moist areas, and it kind of 'forces' that 'radiant barrier' gap that is really quite significant in how well it works.
Remember: When you are talking about insulation, we are always referring to how much BETTER things are compared to LITERALLY NOTHING. Air is a pretty good insulator, if you keep it from moving around. That is 99.99% of what all insulation is actually doing: Stopping the air molecules from being able to so easily flow and set up convection. Your "R13' on the fiberglass/rockwool insulation? Yeah, that is 13 INCHES of dead space and air. That is what that number means. The 2" thick rockwool that is R13 means that you get to NOT have 11" of extra thickness of wall.
It will be cool to see how well this also works with cold weather.
Love your videos, but I do miss the table saw sound effect 🤣
You should paint the outside of the door white,you would reflect a lot of heat.
A white blackout outside curtain,would also do a lot to lower temps on the door.
The point is to not get steel to warm up,not so much to avoid it to transmit its heat to the inside.
The door is white. An exterior barrier isn't practical at this time. 👍
The door was already white as far as I could tell. He also mentioned that in the video.
But regardless, it’s a good point in general. However anyone following your suggestion may be disappointed with the result, given it’s still going to be pretty unbearable inside the shop once the white door has absorbed all the heat possible
@@cpzmelbs "bare steel door" is what the says.
How can the door can heat up if it's in the shadow of an exterior curtain ?
It will be at ambient temperature,not more.
That's is what shadow is doing,avoiding heat to be absorbed.
Very cool project that makes for a cooler shop. What about a roll up shade over the outside of the door to eliminate the sun shining on the door?
Maybe some awning on the outside? Rob
Great video and your 100% on the science which I love to see. I appreciate that you actually did some research on the subject. My garage door is insulated BUT the manufacturer didn't leave an air gap. Instead they just glued foam insulation too the door which experienced direct sun for most of the day. It's usually only a few degrees cooler in the garage than outside. At least it's not in the sun 🤣 I laugh because otherwise I'll cry. Also because of local building codes, builders here so not insulate the walls not facing the living space or above garages so insulating the door doesn't have a huge effect. They save about $100 on insulation (they but I'm bulk) and our cars, tools, things and ourselves suffer 🥺
You only really need an air gap if there's radiant barrier involved, but I get what you're saying. The heat is brutal!
It’s crazy that that cnc machine is only $10K. Back in the early 2000s the cabinetry shop I worked at purchased a cnc machine that could do 4x8 plywood boards. It cost the shop owner over $100K, it because of it we were able to get into woodworking magazine’s top ten fastest growing woodworking companies in America.
i love your computer router table, very nice.
Motion tracked tat. Nice. Always nice when a project comes together and solves a problem.
I wish I had space to do this!
I mean, having tattooed "Subscribe" on the back kinda says a lost about the dedication of Yours. Salut man!
If u add the strips with the the bubble wrap it will take it from r6 to r8. Good luck with the heat. Also think about flipping the unit if you all have another hard winter to keep the heat in as well.
This is fantastic! I know what I am doing next
You’re freaking hilarious. Definitely tuning into this channel!
LOL my Galvo iron workshop here in Oz gets a bit hot as well. In Summer it gets between 50 to 60C in there even with the doors open and the pedestal fans running. In your scale that is 122 to 140. I haven't bothered with insulating, it is easier to just go fishing and wait for the evening to get the jobs done.
"If you're watching this from the future, it was only 108 today"
Scientific American ran an article last week: "This Hot Summer Is One of the Coolest of the Rest of Our Lives"
Greetings from Arkansas.
I'm JUST starting the video, but I'm already thinking a really simple solution: A heavy black plastic screen with maybe a pole through it at the bottom that you can raise and lower on the outside of the door. It wouldn't have to have rigid sides. Just something to keep the bottom laying flat, though it would be problematic in wind. You could secure it to the ground with stakes and some short elastic lines attached to the pole on the screen.
We recently discovered that heavy screen can block a ton of heat if it's outside the window. We've got a bunch of west-facing windows and we're building frames for screens to cover the windows and putting a heavy screen on. We can see through it fine, but it cuts down the heat by a HUGE factor. I was blown away by the difference. We put it up half-way over a window and where the screen is vs. where the screen isn't is, well, night and day. Huge temperature difference. And with the screen outside, the heat it blocks never gets inside.
We have a standard residential garage door. I know they sell insulation panels for it, but we're cheap. My wife found a company that had just received a bunch of large items and had large sheets of ~1/2" styrofoam to give away. So she loaded up her minivan and brought it home and cut it to fit in the garage door. Made a HUGE difference. You could stand in front of panels that had the insulation and panels that didn't and man, again, night & day...
Love your sciencing 🤪
I have that same door and in north Texas too. I used 4x8x3/4" foam board with the foil and taped them together similar to how you did yours. It does make a HUGE difference. I used a FLIR camera and it was very easy to visualize the temperatures.
I very much wanted to order a FLIR camera to show the difference, but I couldn't justify the cost for another toy to play with. 🤓
@@WesleyTreat : Get an Armor 9! It's a nice inexpensive water-and-dust-proof FLIR camera that happens to also make phone calls. :)
One of my previous houses, I had the big glass sliding doors that would get BAKED for 6 hours a day in the summer sun. It was brutal and the inside was so hot it hurt to touch them. You know the deal. Since I was renting, I had to go for the minimal solution. I tried the tinfoil trick, but that just led to hot tinfoil. Instead, I draped a tarp over the OUTSIDE of the window to keep the sunlight from even getting to the glass. The difference was amazing.
I'll bet if you worked out something to hang a large tarp on the outside of the door that you would see even more heat protection!
Your previous problem was due to conductive heat. You needed an air gap between the hot glass and the foil. If the foil is touching the hot surface, then the foil heats up. You were no longer combating radiant heat, just creating a different source of radiant heat. The videos I reference in the video description explain this. It works better with a double-pane window, where the inner pane is not heating up. 👍
Blocking the light from hitting the door would add improvement, though, that's correct. I just haven't come up with a way to do that for such a big door, at least not a way that I find practical and convenient.
@@WesleyTreat
Blocking the sun from hitting your roll-up door will make a *HUGE* improvement!!! This will be the largest improvement you could possibly make.
Just lean a piece of scrap plywood against the outside of the roll-up door to partially shade it and see just how hot the interior door metal is that is in full sun compared to the area shaded by the plywood!
Then make a similar apparatus as the one you designed for your interior seamless paper photo backgrounds. But instead use outdoor garden shade cloth or awning material (like retractable Motorhome & Outdoor Patio Awning material) in place of the seamlesss background photo paper.
You should also make your pulley or cog wheels out of UV stable and weatherproof "King Starboard", Blown PVC (Sintra), or HDPE/UHMW plastic sheet which can also be cut on your CNC.
Space the shade cloth/awning material 4"-6" off of the outer door surface for that air gap. Install heavy duty tarp grommets with reinforcement gussets at the bottom corners of the roll-down shade material or add the "pipe pocket" to the bottom as you did with your seamless paper background.
Add some eyebolts at the base in the concrete pad or to the lower building structure that are spaced about 6"-8" wider on each side than the width of the shade cloth.
Use two heavy duty trampoline springs from the perimeter of a large recreational outdoor trampoline to attach the shade cloth's bottom corner grommets to the base eye bolts. You can buy single or multiple trampoline replacement springs on Amazon.
Search Amazon for "Trampoline Springs" and the Internet for "UV Stable Awning Fabric".
The other thing to do is to paint the exterior of the roll-up door with RV Thermal Roof Coating/Sealer.
There are several brands of this white "Heat Shield" or "Thermal Barrier" elastomer paint that is made to seal and coat the roofs of RVs/Motorhomes/Travel Trailer Campers.
The paint has glass or polycarbonate microspherals encapsulated in the paint to aid in thermal insulation while the paint itself reflects thermal energy and it is elastomer which allows it to stretch or expand & contract without cracking or flaking.
While I'm building my new house, my temporary workshop is in a high-cube 40ft steel shipping container, and painting the roof and the southern exposure side with this paint made a HUGE difference to the interior temperature!
But the single most effective way to reduce the heat gain and radiation of the roll-up door would be to shade it from the sun on the outside! I used large white tarps with an air gap to shade the shipping container and the difference is literally Night & Day.
@@WesleyTreat Actually, I am from up north, the big sliding doors are double paned. Have to be.
We solved this at work with a roll-down dark shade sheet on the outside of the door (we use the big door a lot)
@Wesley Treat
@BadWithComputer
Yes, that would be the absolute most effective way to reduce the thermal gain. 👍
In addition, there are several brands of white "Heat Shield" or "Thermal Barrier" paint that is made to seal and coat the roofs of RVs/Motorhomes/Travel Trailer Campers. The paint has glass or polycarbonate microspherals encapsulated in the paint to aid in thermal insulation while the paint itself reflects thermal energy.
While I'm building my new house, my workshop is in a high-cube 40ft steel shipping container, and painting the roof and the southern exposure side with this paint made a HUGE difference to the interior temperature!
Very interesting and informative video. Looks great and works great! Good job. Thank you for the video.
back when we had to move a bunch of people into the garage so we could space work places out for the rona, we had to deal with the heat coming off 2 metal roll up doors that are 20 feet tall. we hung some mesh landscape matting on the outside of the doors to create a bit of a shadow on them using giant puck magnets that we hooked through the eyelets so it was easy to pull back if we needed to open them for some reason. and it cooled the garage down easily 25 degrees. I like your solution as well, but we wouldn't have space for something like this.
I considered something similar, but I'm not always there and the first storm would destroy something outside. I might consider it next year and just hang it on the hottest days.
BRILLIANT!