Black Metal Roof - Dumb Idea?
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- Опубліковано 19 кві 2021
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For California and other earthquake prone areas, metal roofs are a good choice because they are relatively light in weight. Clay and concrete tiles look great, but on a roof they are like a giant hand pushing down on your roof at all times. During an earthquake, when your house structure is swaying back and forth, you do not want a giant hand pressing down on you at the same time. Metal is also fire proof, something you cannot say for asphalt shingles and cedar shakes.
Great points!
@@buildshow l
@Edward Van Belkom
Sounds to me like you are passing judgment on a layered system like he has done before you put some calculations to paper....
I have toured some houses in Dallas with a dark roof when the OAT WAS 110 and the attic was 78 degrees because they spay foamed the the underside of the roof sheathing, amazing, BTW THERE WAS NO AC IN THE ATTIC, JUST THE AIR HANDLERS THEMSELVES.
The Oakland fires of '86 (I think) had four or five houses that did not burn down. All were stucco exteriors like the ones that burned down. Difference was, the ones that burned down had tile roofs and thre ones that did not, had Gerrard stone coated steel roofs. The pressure caused by the fire lifted the tile, enabling embers to get under the roof onto the roof deck. Due to the face nailing installation of the Gerrard product this did not happen and thus saved the homes from disaster. Tile is dumb on any roof, due to its weight and the necessary maintenance every 10-15 years.
Clay tiles are fire resistant too. And they don't weigh as much as concrete tiles.
All we install is metal now. Replacing your roof every 15-20 years or less with heavy, black asphalt shingles is stupid when you can pay a fraction more for 3X the lifespan and far less stress on your roof. We install G-rib for almost the same cost that most are charging to strip and replace shingles here, and we're usually done roughly a day sooner because a metal roofing panel can cover more area faster. I've measured the temps radiating off of both while baking on them on hot summer days, asphalt shingles are the worst by far - if you can even walk on them without damaging them. Metal roof coatings are engineered to reduce heat absorption, even the blacks. Our black isn't really black, it's more of a charcoal/dark grey. It's a no-brainer for homeowners. The only downsides are that it's more dangerous to work with and metal roofers are kind of screwing themselves out of future work. But there's more to do than roof. Get a journeyman cert if you can, kids. Don't sell yourselves short.
i understand how metal roofs are more dangerous to work with, but "metal roofers are kind of screwing themselves out of future work" - can you explain what you mean by that? do you mean the injuries are THAT bad (eek) or are you referring to something else? thanks.
pricing around here (central Arkansas) was virtually double for metal vs architectural shingle.
Metal roofs are NOT a fraction more than a composition shingle. That's a ridiculous statement. Be real.
What market are you a roofer in? I'd like to find metal roofs for a fraction more than shingles.
So what your saying is it should cost less in labor to get the metal roof then the shingle roof because you finish a day sooner (less labor for you) and it’s easier.
My metal roof is dark bronze - almost black. I have tubes in it to capture heat for hot water and heating.
That's a great idea!
I guess it's hydronic loops with a pump??
IT'S a form of solar radiation nd is a reliable source .
Roofers should offer that on installs
That’s so smart wow
We just had a black metal roof put on yesterday and it is beautiful. How would we go about getting this your talking about?
Do you have any pictures of your installation? That is impressive
This is a good book. Does provide a step by step introduction to how to build things ua-cam.com/users/postUgkxhgbP-6hUnXu_QRaoHgLztgsI0YF3HqR0 , also does offer some steps. Includes pictures to give you ideas for layouts and such. If you are looking for a guide, this is not exactly what you want. But if you are trying to familiarize yourself with the way that pole barn building and other out buildings, are made, then this will work just as you need it to. A few things in this book are a barn (of course), detached garage, storage building, and coops.
3:45 He admits that "Yes, black is the worst possible choice of metal roofing with an SRI of only 25." Any other conclusion is wishful thinking.
True, but color choice barely matters if you run an air gap and a radiant barrier like he is. I did this and my attic space temps went 140 to 95 in the middle of summer in southern Illinois.
I have a white metal roof with an sri of 93. It saves a ton in the summer BUT it also costs me a ton in winter. They did a study and even in hot arizona a white roof only saves about $200 or less per year for an average size roof.
The big downside is the faster facing of the color and the stresses related to expansion and contraction
Agree, he can point out all the things he does to help with the problem of picking a 25 (absolute worst) over a 100 (best) but the end result is using the same systems on both houses the one with the 100 will still perform better. Would also help all of the building products connected and directly under the roof last longer. His house is normally based on picking the very best performers but the color of the roof looks to be 100% how he wants it to look.
@@pembo13 From Lil Giant I know NOTHING about this stuff. Watching because a friend is considering metal roofing when he homesteads in Florida. So, are you saying black is bad for environment, metal is, or all that extra under the roof he talked about, to make up for the black, is bad for the environment?
P.S. Am asking friend to build for both heat AND cold in Florida. I am hoping insulation will help in both instances. Black metal would be good, I think, in winter but am not sure.
Another video is talking about possibility of a “little” ice age coming through in couple of years due to a “solar minimum.” Want prepare, just in case. You may remember England Thames River used to freeze over and they had ice/snow “fairs” on the ice of the river in winter, during another “little” ice age. (Not that video host said that. Do not wish to put words in his mouth. I am putting in my two cents as reason that I listen.)
yeah, but look at the bright side... he's "on trend" - LOL!
I don't know about black metal roofs or asphalt but I do know replacing a windshield in a black vehicle in an asphalt parking lot, at 3 o'clock in the after noon, wearing a black shirt can help build character as sweat beads evaporate forming a thunder storm warning.
LOL!
I have a white metal roof. I was really thinking things out when I made this decision. My garage is uninsulated and the difference was amazing.
Any issues with staining? that would be my biggest concern - my current roof is charcoal. Solar panels shade most of it though!
@@BLKMGK4 most barns have white metal roofs. They have no issues with staining. I helped my dad build a steel building (new barn) back in 2005. After 15 years no way would anyone notice any stains and that’s with a very large black walnut tree overhanging part of it
Good! If those of you who care about climate change don't pick a white metal roof, shame on you! =D
Mine is a dull lite yellow almond to hide slight issues if nothing else the longevity is more than enough.
Shouldnt black roof be better insulator? Since it will be more heated, and less heat will be transfered from the building outwards?
Black roof looks amazing but not sure if I would go choose it in a hot climate. Too hot, bird droppings, polen, dust.
Or just choose a different color.........
His sponsors will pay to keep it clean
Who cleans their roofs?
Rain will do that for you,..
@@Justusson rain doesn't really clean roofs particularly bird poop...
@@carholic-sz3qv What kind off bird poop do you have?
Our roofs gets cleaned more or less at least,..
Matt, I am a boat builder and designer. You would be surprised to learn how much your videos help with the boat design. The comprehensive approach to each subject allows me to choose strategies and even tho the equipments themselves may not be the same, I can usually find a marine equivalent for the purpose at hand. I know your target market is residential home construction for the most part, but I think you should know that some people in other fields are also paying attention! Thank you!
It’s a far stretch. Very little likeness in my experience.
The building equivalent of a balsa / fiberglass deck is SIP construction. It's great!
I have had TWO Jeep Wranglers with black hard tops. I live in the "LAS VEGAS" area. HOT DESERT ENVIRONMENT!! As soon as I arrived here, I started experimenting around with the color of the hard tops as my A/C (air conditioning) was struggling to keep the inside cool in the summer months. Black color outside of the hard top equated to 175 degrees inside on the ceiling of the hard top. I added insulation inside and I did not see as significant reduction of the inside temps and the ability of my a/c to keep up. The second I painted the outside of my hard top WHITE, my inside temps dropped from 175 degrees to 125 degrees. NOW, the air conditioning could keep up and the ambient air temps were maintained with "HALF" the settings of the A/C unit. Now my a/c could and would keep up with the outside temps even if they were over 110 degrees outside. Black outside color of a roof (house/car/ANYTHING) does not make sense to me unless you live in ALASKA!!! Use a laser temperature measuring device and TEST EVERYTHING!!! Black absorbs heat and white reflects heat.
When it comes to cars the insurance data is really clear that black and dark coloured cars are around 20% more likely to be involved in an accident than a white car. It all about visibility from dusk to dawn. Only idiots buy black cars anywhere. If you want to be really safe orange and yellow are the best colours.
@@jonathanbuzzard1376 could this be why company and utility vehicles are almost always white? I’m thinking of the gas/cable/satellite/phone company vehicles
Mine is "charcoal grey". I can't remember the last time I used it though!
"laser" thermometers should not be used on objects with different emissivity (color) as they would read differently even if they are the same temperature. By definition, a black object will always read hotter than a white one, but that is a limitation of the measurement
now install radiant barrier insulation in your rafters that will cool it down even more , research it you will be amazed how much cooler it will be
If you put a black roof on a house in a hot climate you are making an oven.
You could fry an egg on that in the summer.
Will also break down his building materials faster with it as well.
True! Decades ago, my first house was an old mobile home, in mid Missouri. The roof was metal painted with silver metallic roof coating. In the heat, I couldn't hold my hand on the roof for more than a couple of seconds. I recoated with a white roof coating. Not only could I touch it, I could leave my hand on it. On the inside ceiling, with the first coating, the gypsum ceiling was warm to touch. With the white, it wasn't noticible. On heat retention testing, black and red were the two worst colors..
True. In Australia right now the trend is dark grey/black and all the roofs are metal. I have installed one roof in the last 5 years that wasn't black. They get so hot you can practically burn yourself on them. And the builders here put so little insulation on the homes. Its so bad for summer, when you are in the ceiling its like an oven. And i dont think r 4.2(us r23) batts are doing much to stop heat transfer from the roof space.
You can fry an egg on asphalt too
@@StreamingF1ydave Yes, but I doubt you could fry one on a white roof.
Not a roof, but we have a 40' shipping container we use for storage. It was initially matte brown/red, and it would get super hot inside in the summer. I painted it gloss white and now it is essentially ambient temperature inside. White is far superior from a pure thermal loading perspective. But hey, it's not my house! :)
Truth black roof great choose in Alaska in the south it's not.
In the summertime go sit in a black car that's been sitting in a parking lot and then go sit in a white car that's been sitting in a parking lot the temperature is huge difference
I agree that he made a bad judgment in choice using BLACK for his roof and then try to bring in experts to justify how good his ventilation roofing system is......
Key component is insulation. You can use a dark color and not have thermal transfer if you insulate correctly.
but it's popular.
Canadian research people found one of the biggest contributers to attic temperature was roof color way more then ventilation
In some of Montreal's neighborhood its illegal to build or rebuild a non white or green roof.
I have a well ventilated roof but you could not spend more than a few min. in the attic in the summer but when I put a white metal roof on with 2" insulation it was at least 20 degrees cooler and lowered my electric bill. I live in North FL and when I saw that black roof, well I'll keep my thoughts to myself.
He also has closed cell spray foam on roof deck. So his attic is room temp.
Good part about the black and reflective.. It will dry any mold or moisture out quickly.
Matt has studs insulation with rock wool, then 5/8" zip, then 4 inches of foam, then another 5/8" zip, then a radiant barrier, then a air gap, then the metal roof...im sure he isn't affected by the color at all...Great work Matt!
@@infiniteadam7352 Exactly true. I don't know why so many other comments here don't understand this.
Looks cool! .... Still wouldn't buy a black roof here in the south.
Or should I say it looks HOT!
I’d like to see him lean up against that roof in July.
Max Temp of XPS\EPS is about 170F/76C. I suspect a 100F+ Texas summer day, the temperature under that roof is going to be more than 170F!
For all of the efficiency talk on this show I would have expected white , estimates say 10% energy savings.
Initial guess: it's going to look dirty every day, you'll see a dent 6 miles away & it's going to get so hot..you'll be finding cooked pigeons on there in the summer. I guess we'll see.
Like buying a black sports car, the best it will ever look is when it’s still in the dealers showroom.
It's look great until tree sap, dirt, and other particulates collect on it for a few months. Then it will look like a mushy dull mess.
Lol
With so much insulation underneath required for Passif Haus certification and a layer of radiant barrier with an air gap, Matt doesn’t need to care what colour roof it is, to be honest.
This comment everyone. A lot of people have clearly not watched the videos on this build. His monoply house construction and the umbrella roof makes the roof color a moot point.
Not really. He's in Texas. Every little bit he can do to help his A/C is going to save him money for the next 50 years.
@@dlwatib I beg to differ. He’s got an R20 roof deck with an air gap. That’s before the radiant barrier, another layer of air gap, and the interior insulation are taken into account. It really won’t make a difference what colour his roof is at that point. Indoor cooking would add more heat to this home than his roof colour.
@Ganga Din Yes, I do. All I’m saying is: with that much insulation, the heat gain from the black roof is negligible. His heat gain is more likely to come from windows and indoor cooking than the roof at this point.
It's still going to create a whole lot of hot air, even if that hot air is excluded from his living space. Energy efficiency is about trying to minimise global warming - he had a choice between a colour that would reflect incoming solar radiation straight back out to space, or a colour that would add to his local urban heat island, and he chose the wrong one.
In Buffalo NY the black metal roofs are often the only ones with 0 snow on them during the winter.
Probably not a huge concern in Austin Texas
You know that snow will never collapse the house if you have a black roof then.
How do you know what color the roofs are that are covered with snow?
TBF, I wouldn't mind the snow on the roof as long as it doesn't melt and refreeze. Hey, it's free insulation!
@@hailexiao2770 it is also a massive amount of weight that, with enough of it, could collapse the whole building.
Yes. Back is a bad color choice for a roof In Texas. The paint will be fine, but it will be soaking up tons of heat that you will have to offset with more insulation. A score of 22 out of 100 on reflectivity is terrible.
It will release the heat better after sun down however.
@@christianvanderstap6257 um.. why is that? The color effects how light is absorbed or reflected. Not how it is released after sundown...
@@christianvanderstap6257 With a lighter roof you wouldn't need to radiate as much heat in the first place.
@@jonathanrogers9961 The color affects the ability to radiate heat into a cold surface, i.e. the night sky. Black objects radiate the best, white and reflective objects the worst.
You could have used the black roof to heat pipes to offset water heating. If/when I reroof I am either doing metal or Tesla Solar roofing.
Hope to see videos of the "trim," work on this house. Trim, cabinets, countertops etc . It's been fun watching the progress
It would be interesting to put a thermometer in the air gap and another in the attic and set up a sample with a white steel roof, also with thermometers, and see what the difference in temperature is. It might also be fun to see if air flow rate in the air gap changes significantly from black to white.
His attic is conditioned space.
@@markboler8411 I know.
You really really want the roof color to match the same tint of color that is native to the local or migrating bird droppings, or your gonna wish you went with a type of paisley.
As long as you don't have trees over the roof that they perch on.
what about 24k gold roof?
🤣
That black roof is also going to expand and contracr more than a lighter roof. This will result in more movement and more stresses on fasteners and anchors holding the roof in place.
This is solved with proper engineering and roof design. If you know how hot the roof gets you can calculate exactly how much it will expand and how much stress it will put on the fastners. Not a hard issue to mitigate.
@@joshnabours9102 so in other words, yet another cost penalty to mitigate a bad choice.
@@joshnabours9102 The expansion and contraction of the roof will overcome even the best fasteners over time!
@@gmcnelly2468 sure, but if it works fine for 20 years then you are good.
Strapping the roof first and doing metal on strapping is the best way.
This is a good example of sacrificing science for visual Aesthetics.
Sacrifice efficiency, not science. It’s there whether or not
With the cooler like insulation design I’d bet the difference in energy loss is negligible, I still don’t quite get the radiant barrier being reflective side down....?
It’s trendy! Like teenagers swallowing Tide capsules...
@@RJ-sr5dv he does the radiant barrier facing differently in different parts of the roof, but always shiny side towards the air gap. When the radiant barrier is on top of the 3D mesh/dimple mat, it faces down into the gap and works on the principal that it’s emissivity is very low-the temperature of the radiant barrier will be high (because it is in contact with the metal roofing) but it’s low emissivity causes it not to radiate very much of that heat across the gap to the deck. When the radiant barrier is under the gap on the decking like he has on the steep pitch portions, it faces up into the air gap and works because it has high reflectivity-it reflects the heat back that is radiated by the hot the metal roofing. You can actually put it on both sides of the air gap facing shiny sides together and double the effect, but the typical radiant barrier is already effective at about 95+% so that isn’t generally considered necessary.
@@MartinThmpsn radiant barrier is the construction equivalent of snake oil. It works by being a surface that doesn't emit heat through radiation, it's value is around .1, meanwhile dust's emissivity value is around .9
Ever seen an attic that wasn't dusty?
Matt: You did so much to maximize your energy efficiency, then you throw it all away by putting up a black roof. My roof in Florida is bright white. Smartest decision I ever made in 1994. The energy savings along have paid for the roof.
Can you get me those penalty numbers for a black roof vs a white roof. Like how it exactly throws all of Matt's energy efficiency measures away. That would be great. Thanks
Okay, but what about his rock wool, zip sheeting, air gap, reflective radiant barrier, and 4 inch exterior insulation? That makes a big difference.
@@ljuwt200what remember for Matt a lot of those costs are gone or reduced. Probably got free materials and labs for the advertising, and any work his own people do is not marked up. So for him these mitigation's were much cheaper than if you or i had it done.
@@urchin11 Likely true but he shouldn't be selling people on this idea when everyone else will have to pay for it. " With the black roof in Texas, I have done the following with sponsors products to offset it". For the average home owner paying a contractor to do the work, decide if all of this is worth the money.
@@jacksak yea, it's dopey to spend as much as he did on the roof system . Payback on the upper 30% of stuff he did he will be dead by the time it makes sense.
Yes, dumb. I'm surprised you went with such a dark color and not a lighter one.
Maybe a trivial question but are the cut edges treated, painted? So often on flashing streaks occur on the cut edges from the metal, aluminum, oxidising. Any thoughts?
He answers the question at 3:35
SRI index Black 25 White 100 = Yes it is a dumb idea.
It isn’t that simple. There is also emissivity. Black radiates heat better than white. When you combine it with a radiant barrier that reflects the heat back to the roof where it gets reradiated back to the sky. This is the same reason tinted windows cool a car despite being dark. Yes, white would be slightly better, but black isn’t dumb.
So he starts out by answering a question with "yeah, no". Then, he justifies a black roof by saying essentially, all my friends are doing it. Felt like I've been catapulted back into kindergarten
I could see 2 temperature probes being embedded into upper 1/2” of the polyiso exterior roof insulation adjacent to each other on same gabled section. Maybe Sheffield metals would be interested in sponsoring the test, providing a single section of white standing seam for one probe, the other under black section. Both installations would employ same solar insulator layer shown in vid as well as same air gap underlayment.
My $$ would be the temperature difference would be
I don't understand the issue. Pretty much every issue in life has pro's and con's. He knew that but wanted a black roof because he liked it( does he need another reason ) and he designed the roof to minimise the con's of that choice. what exactly is the problem here ?
@@MichaelM-to4sg 1) "
@@NeonSphinx89 1. I have not done the calcs, true. I’m basing my conclusion on my experience as retired aeronautical engineer. The thin gauge steel, the radiant barrier and the thermal air gap effectively insulates radiant energy transfer.
2. Again due to the physical structure, surface thermal absorption is largely negligible due to structures inefficiency in thermal transfer of resulting radiant energy.
3. While the low thermal mass of steel roofing and the layout prevents efficient transfer of radiant energy to building envelope, that does not mitigate the dark surface from better maintaining surface radiant energy that will allow snow to more easily shed from smooth steel roof surfaces, particularly beneficial in lower slope (3:12) applications.
I only mention this for those in snow regions. I’m in high Rockies, 9200’ asl. While subject home is in Austin, I suspect vast majorities of persons watching this video are not in Austin. Many likely in a snow region, most of whom use min 6:12 roofs but there are some, even near us, where 3:12 or even 2:12 are found
That is true of the vast majority of his videos, but they are for this reason all entertaining, though also simultaneously a little annoying.
Beautiful system, I will be curious to know what your electric bill is after you move in.. Also what the inside of your roof system temp is in your attic space..
Here in Key West Florida, we have mostly metal roofs because of fires. Half the town burned down once because they couldnt stop the fire from jumping roof to roof. We just got done with a 3 million dollar home with a black and white theme.
In terms of thermal performance - yeah, it's dumb. ALL that effort to make a tight and efficient house, then topped off with the highest heat gain roof possible.
I love how the roof shows bird poop. Easy to see.
Just set up some eco-friendly wind turbines to kill the birds. Problem solved.
The bird poop will likely char to a nice roof matching black due to the heat
Dark floors should not be used, every speck of dust can be seen from the other room.
You are one 'Top Shelf" guy, Matt. I built my house out in the rural East Texas area and relied on your judgement for a lot of my decisions. [I built it myself - didn't contract it out] My 2X6 walls are holding my electric cost to >$130/month Yay! Many thanks for your guidance, my friend!
How well does the colour coating stand up to the installation stresses when folded/crimped, and how do you treat exposed cut edges, especially at the gutter line on the folds?
Lot's of strange things in this video. First of all, when I think about dark color for a roof I don't focus on the fading as much as the heat gain. An air gap is good but in the south where the moist air retains more heat, a dark roof creates a outer layer of heated air that can prevent air from moving efficiently through the gap. Also, a reflective barrier should always face the air gap that will remove the heat, but it should also face towards the source of that heat. In the video it looks like you placed the reflective side facing down on top of the gap material, which would be the exact opposite of what you want. In fact, facing down under the metal it would essentially act to conduct heat from the dark roof directly into the gap, preventing it from leaving, and any kind of dark roof sheathing below would absorb that heat and conduct it into the house.
Yes I was thinking the same thing in regards to the radiant barrier installation. Maybe I'm missing something? Nevertheless I enjoy the advice and work put in to creating these videos.
Read up on EMISSIVITY. It's confusing, but that radiant barrier is installed properly.
@@JessicaLarsonDVM Nope, that's just not right. This is one of those things that every architect is trained to do, be able to calculate heat transmission at every point through a wall. I found this guy, who I assume sells a reflective barrier product and demonstrates the installation. He shows and explains it correctly. ua-cam.com/video/dEl5tNRmVoo/v-deo.html
Wouldn't the radiant barrier do more good on the bottom of the air gap with the shiny side up? It looks like you'll mostly be reflecting radiant heat from the attic back into the attic with the way you installed it.
I agree. His application of the radiant barrier and its air gap looks backwards to me. My understanding of radiant barrier installation requires the air gap to be between the source (roof) and the radiant barrier to isolate the space (attic) below.
Matt, good explanation regarding why you can get away with a black metal roof in the South. For the reasons you explain, I went with a light white metal roof on my house in sunny Charleston, South Carolina (panels applied directly over ice and water shield membrane) . The performance regarding heat gain has been pretty good. But the big problem we experience has nothing to do with energy efficiency.
A fair portion of my roof is overhung by a huge water oak that drops particulate matter and leaves on the roof several times a year. (I'm sure you've witnessed this around Austin as well.) If I don't pressure-wash the roof once a year, I end up with a black roof by default after about three years. It's pretty amazing. And I noticed that your house has oak trees overhanging part of it. I can't tell what species those trees are, but if they're water oaks or even live oaks, you'll look pretty smart with a black roof because it won't easily show that particulate matter buildup. (Yeah, if left on there, it stains.)
It would be interesting to see some attic temperature readings in some test structures built just for the purpose of finding some answers to this question. I live in Miami and plan to install a metal roofing system over the next year or two. I would love to see the difference over several color choices.
This is what UA-cam played when I searched for black metal
Well, that is the most logical thing I have heard today. Oh, and Chauvin guilty.
Watch out! You might learn something instead of listening to trash music lol
UA-cam: “you’re welcome, peasant”
google's AI is ill
I mean, youtube was technically correct.
When he was talking to the tech,they made the comparison between the black metal and a white asphalt roof,not between white metal. Were not stupid,white is cooler. But if you put enough insulation and air gaps you could cool down a volcano. Shsh!! Matt
I have a regular galvanized corrugated roof with airgaps underneath. Roof is composed of 8 inch thick foam panels encapsulated in reinforced crete. It is nice and cool on hot days.
These black(or Falu red, green) are super common here in Sweden! It's been used for ages and you can see many houses with them without a ton of fading :)
I work in engineering for a major steel building company. A few years ago we switched to the same type of heat-reflecting material used in these panels. It really does reduce the amount of heat in the material and inside the building.
Friction condition conduction convection meteoric or imperial reflect 🧙♀️ ray of lite is a wave and a particle? Haha I hope a good answer is in route to a miracle mike know Ik magic like Voldemort balls in the your court?
You should talk about the Tesla solar roof system. I would love to see a comparison between Tesla's roofing system and other methods.
There are places with metal roofs from the sixties still around. Seen any of those 1970s solar roofs lately?
can’t be any worse than a black asphalt shingle? just way more durable and better looking, i’d go for it.
With asphalt shingles, the color is almost irrelevant when it comes to heat load inside the house. It simply takes longer for the asphalt to get fully heat soaked in sunny weather. After that point, the differences don't matter.
Was not trying to work on my house today until I saw this beautiful roof. 😍
For many people calling out that the Reflectivity index was all she wrote and therefore dumb for him to do. If he was to put the standard asphalt shingle roof like 90%+ homes have the reflectivity and emissivity is out the window. It's just a tar jacket soaking up the heat and molding over time. of course, there is going to be a heat index difference in lighter and darker colors but that doesn't mean he trashed the house and it's worthless now. he definitely did a phenomenal job on the roof and could've put a plastic bag on it and been far better than most homes.
Short answer: a black roof in Austin Texas **IS** dumb **IF** you're expecting it to perform like a white roof 😉
Which means anyone actually paying it's dumb.
@@davidg5010 In Austin?? Maybe 2 months?
@@davidg5010 If the roof or attic is insulated, like it should be, the heating assistance is minimal, especially since sunlight is at its weakest during the winter.
I love black roof. I just installed a black metal roof on our new build in WYoming. I wanted extra heat in our cold weather since we hardly get in the 80s even in summer
Lighter colors are essentially free AC as they keep the roof components (and therefore attic temps) from absorbing the sun's energy as quickly as dark ones. But if you design in with this in mind - especially raising it up off the deck - it's ok to go with a dark color.
BTW, The black looks great on your house.
In australia, my parents have a color bond corogated steel roof in cream, problem being you can see dirt and mould easily on a light colour roof that you wont see on a black roof.
I have a metal roof on my front porch that was installed in the 1940's.
1940 metal was metal, today is aluminum covered with layers of crap
Yeah, it's weird, but the installation instructions for the sharkskin radiant barrier does say to have the reflective part down.
That's because it's used for it's low emissivity, and not for it's high reflectivity. See my other comment for a longer explanation.
It's not weird if you understand thermodynamics, but then the physicist inside screams every time I hear someone says heat rises. Hot air may rise heat is unaffected by gravity to any noticeable effect unless you happen to be in the vicinity of a black hole.
Do you get many hail storms in your area? What are the conditions that insurance will pay for a damaged roof? Where I live in Canada hail storms are very common and insurance companies will not pay to replace a dented metal roof, there has to be penetration through you metal before they would replace.
My father worked for Gulf Oil 50 years ago and he did testing on paint colors for oil storage tanks. He measured internal and external temperatures and WHITE outperformed darker colors (even silver) by a signficant margin. Using any color other than a very light color on a roof whether metal or shingle adds significant cost to cooling bills in the summer. If you live in a southern climate, do NOT buy black!! Maybe up north it works to keep those folks warm in the winter?
I live in Texas. Black would not have been my first choice.
He lives in Texas too.
Yes he does.
@@robwalker8530 so do I. It wouldn't have been my first choice either.
Southern AZ. Black roof would be suicide around here
I have vaulted ceilings, that heat would transfer to the living space pretty dramatically.
Anyone else think that every time Matt said “I really wanted” when talking about his house’s aesthetics he actually meant “My wife really wanted, and I’m a smart husband so I agreed.” 😄👍
Talking from experience son ??
If you accept everything that your wife asks for - evidently not understanding the consequences - your are NOT being "smart". I will generally accept my wife's recommendation on colors of things because I couldn't care less, but I'll preempt her on anything where she has no competence. I still like that black roof very much though 😂
Just redid my roof I'm ms. Love the look, didn't seem to change any increase in ac, still comfy inside. 👍👍
I have a 1950’s house that I’m guessing got steel siding in the 1960’s and we want repaint it what would people recommend and also I have some old drill holes that need to be repaired. Any tips would be great. I’m in Milwaukee WI
I wouldn't go pure white. It's the best performer thermally, but you and your neighbours are going to have to look at it and bright white in full sun is hard on the eyes. If you can find a display centre with a wall of the manufacturer's colours outdoors facing the sun, looking at that in summer will help you decide how pale you can tolerate.
For the repair, I'd recommend you go to your nearest hardware store, explain the problem to them, and ask what they recommend. Take a whole lot of photos first to show them so they'll know the scale of the problem.
That south west Florida test site is a block from my house lol
I couldn’t believe that guys claim that FL would be most harsh UV exposure. That is factually false. Higher elevations have greatest UV radiation, just ask any aircraft paint manufacturer. Anything above 4500’ asl will be far more harsh due to density of smog. We’re at 9200’ asl in CO, uv index in Summer here can reach 14. I would be surprised if FL ever exceeds 10, excluding on-water reflectivity of course.
Have a vacancy nearby? My daughter wants us to move to Florida near the beach, promises to visit more often...in winter. LOL.
6:41 Is it just me or are the installing the radiant barrier upside-down (reflective side towards house)?
That's because it's used for it's low emissivity, not for it's high reflectivity. See my other comment for a longer explanation.
We installed a black steel roof on our house a few years ago from Menard's that has cool paint technology and added ridge vents and a vented cupola
My concern with a metal roof is when debris piles up in certain areas requiring you to sweep it off. I presume that it is slicker and more leaves just blow off. Still, I have got to ask- can you walk on it while using a safety harness?
Very suprised in the color, black vs white would be 50-60F delta, try it on a full sunny day at 2pm. Also try holding a hand on a black car vs white. My concern is paint, and underlayment. In Fl black 3D shingles fail in 10 yrs, just happened to next to me, I have white tile and white block.
I understand that there will be some degree of thermal bridging, but with heavy insulation and an air gap, wouldn't it be minimized by a lot?
@@SparkHelium Yes, you are correct, but radiant heat to windows and side of building, but my point is the underlayment will be that much hotter and the paint cannot and will not last as long as a lite color. Maybe the wife had a hand in this? It just goes against all the other efficiency measures taken.
Why is the radiant barrier face down?
His last video covered that
@@MrDunaengus Interesting. I just went back and watched it but it was a very brief description. I would be much more interested in a description of the physics behind it because it seems counterintuitive.
@@wheatgrowssweet It's counterintuitive because it's quite clearly wrong for Texas.
@@dlwatib 😆 like walking around with a black leather jacket on in the sun. At least it's high quality paint and has mitigation factors in place. I know rustoleum flat black doesn't last very long in sun light without going gray. It seems like he has at least a couple of trees to shade the house though.
I recoated the sun room roof in my Florida home white, the ambient temp easily dropped 10 degrees after.
Looks great! I like the black look, especially the Tesla glass roof.
We have a saying in my family "dont go barrowing trouble" black roofs are trouble for the sake of vanity
very different from standard in Europe where it's mainly roof tiles and done well it can last centuries. I guess the labor cost is way much cheaper on the metal side though.
Metal is commonly used for warehouse or when there it not enough slope, and some place have zinc roof.
the nuts part is that in the south of europe they use the most clay and concrete roofing. where they also have the most quakes and big storms. with the north western parts like the netherlands its almost only clay brick tiles and yeah with storms they can go flying.
I priced a metal roof, and a tile roof in Croatia for a house. Metal was more expensive - it's more labour intensive to install than tile.
Yeah, metal roofs are very coomon in warehouses if you want a sloped roof. But, they are not made-up by architects or contractors; they're "metal roof sytems" such as VicWest's Marquis. Have used that system a lot.
Have also done zinc roofs - usually made by Rheinzink. Zinc roofs are gorgeous, although they can be expensive. They also require a high degree of metal roof installation experience and training. Not every metal roof installer can do zinc - manufacturers won't let them without extensive training, because there so much at stake with zinc roofs.
@Ganga Din
Neither! It's a question of what geographic region in the World you are talking about. Local market conditions dictate.
Nexe, and Tondach are big players when it comes to roof tiles in some regions. They make excellent tiles, and are not expensive.
@Ganga Din Yes, I'm talking about clay tiles. Unfortunately, I left my laptop in Croatia, so I don't have the actual numbers.
Roughly, for a 2,500 sf roof, the tiles *supply only" came to around CDN $6,000 for the Nexe Valens (black) tile.
The metal roof was roughly CDN $9,000. It was made by Prefa (standing seam, zinc coated steel).
Installation costs are higher for metal, than for clay, according to a couple contratctors I spoke to, because metal roof are more complicated to install than tile. The roof structure is essentially similar for both roofs. Labour rates are cheap over there.
I think with installation, the Nexe clay tile I could have had for under CDN $10,000 easily.
You can, if you want import them to North America, but depending where you are, the contractors may not know how to install them properly. Tondach is another very large roof tile manufacturer in Europe, and they have a huge selection of clay tile profiles and colours including white, if you prefer.
us.prefa.com/
European web sites are not in English, and they carry a larger selection over there.
www.nexe.hr/en/roof-tile-6074/6074
nexe-crijep.hr/proizvodi/valens/
www.wienerberger.hr/proizvodi/krov/tondach-crijep.html?gclid=Cj0KCQjwvYSEBhDjARIsAJMn0liPSQ2EQAlvQjxG8m-WIkQ1IiPghNTiamC-sDE8MmWXArblpsBmhewaAtaWEALw_wcB&loadmore=2
Asking S. Williams Paint a asking Sheffield Metal Roofs if black is a good color, for a roof, is like asking a Fox if the hen house needs guarded.
I'm confused, maybe someone can explain why you would want the reflective side of the radiant barrier facing down (tower the air gap) rather than up (toward the roof and sun). It doesn't seem to logical to me.
A reflective surface could also be called a poor radiator, it works both ways. So the air gap gives you a thermal break and any heat transferred to the reflective material doesn't radiate to the roof deck.
It's happening. youtube is becoming crappy commercial tv. The worst thing you can do is recap what you just had a conversation about 3 minutes ago.
Let it be a 7-min video and be done with it. I REALLY like this channel, tighten up that writing.
Hi Matt, I actually think you'll replace the roof when there's a compelling solar technology that's too good to ignore.
We have a galvanized style metal roof. It has a hint of charcoal coloring, and looks great.
Why would a site in Florida be the most aggressive UV environment? I live at high altitude and I can tell you that UV is much more intense here than in a low elevation high humidity area. I don't think the person selling this product is informed. Or am I missing something? "UV exposure at high elevations is significantly greater than at sea level. In fact, there is a 6 to 10 percent increase in UV exposure for every thousand feet of elevation. For example, here in Colorado Springs, which is about 6,000 feet above sea level, the UV exposure is 36 percent higher than at sea level"
Yes, to answer your question. You are upside down at least a quarter to half a million already on your “ rehab for the average person’s budget “.
I always thought the foil side should be placed towards the heat source, which would be the sun, to reflect it away. Why is the foil placed faced down on the roof?
It has to be placed toward the air gap.
I have a Decra Tile roof on 2” batons with solar Hyde underlayment(shiny side up). Under that is ice and water underlayment. My attic stays nice and cool.
It looks nice. I have a hard time believing it won't add more heat to the home unless you have super insulation in the roof. Being set up off the roof might help some.
Now for the advantages besides the look, 1) you can have solar panels installed inside those standing seams which will match the color 2) you could run pipes underneath the metal to draw heat away and heat up a solar water heater. 3) You'll be able to hear the Ninjas when they are walking on your roof because they studied in Hollywood and can't help but yelp when they touch that roof in the summer.
Did you consider a Tesla solar roof? It is available in black.
Probably couldn't get it sponsored
👍🏻
As soon as he answered black roofs are popular because they look good he lost me. Not only was that a stupid answer but he didn't answer the question if black roofs are a dumb idea. IF you want to turn your home into an oven then by all means darken up your roof. But if you want to repel some of that heat then choose a lighter color. It's all pretty simple really!
This year black has been the color choice of over 80% of our orders. I don’t even bother asking anymore what the color is when I get an order.
My parents had friends in SW Florida that had terra cotta roof tiles. They don't hold up so well in hurricanes, and it took almost a year for some of them to finally get the tiles replaced after Irma. My question though is what if at some point you decide to add solar panels to your house. If you live in the south in a sunny climate would a metal roof make it more difficult to add solar panels?
This color is perfect for a pole shift. Beautiful!
Florida will be washed away by the gulf water.
I have a black metal roof, looks amazing, SUPER ANNOYING in the summer, no matter the expansion joints, no matter the expansion holes for the screws, it still buckles, bends & warps during hot summer days (or even spring, the problem has already started), when it cools down during the evening the roof unwarps itself to flat again & it sounds like a gunshots/explosions, keeps me up at night....but who knows, maybe your roof is immune to this issue
Appreciate the clarifying answer @ 7:22 because it was clear that asking a sales rep was only going to receive a sales rep answer (and "emissTivity"?). Matt's preference can be respected considering what other measures he explains having put in place for top tier mitigation.
With the furring strips lined up diagonally is it hard to line up the fasteners? Or do you put them into the furring strip in one place and not another?
Its certainly a nice keller.
Will bird droppings discolor the paint?
The birds would burn their feet if they landed on his roof, ha! But flying birds poop too
Rain is going to take care of the droppings. If it doesn’t pressure wash it, shouldn’t be hard it is metal after all.
Ahhh.. sizzling bird poop.. Hot off the grille.. 😂😂😂
Looking at that shark skin roofing, it seems to me that you could use the channels to lay in passive solar water heating pipes. Double duty.
As for black roofs, black absorbs more sunlight, so that if you have snow itll take longer for the snow to stick on the metal.
I’m looking to do the white black color scheme is it aesthetically better to have white facia/gutters with black roof or black facia/gutters?
hey man, you like what you like, don't worry about others' opinions. who cares if it's dumb or not. it's YOUR freaking roof and it looks amazing IMO!
The look is perfect, and with the insulation, reflective barrier and air-gap you shouldn't get much (if any) heat gain from the dark color there in Texas. I'm in Michigan however and for better than half of the year I would _WELCOME_ heat transfer into the house!
Keep on mind solar gain will be significantly reduced in winter, especially in the north, and especially on low slope roofs.
I would still go with a lighter colored roof, even where I live in Canada.
@@Bob_Lob_Law A low slope roof isn't in the forecast unless I can persuade "she-who-must-be-obeyed" to move to more southern climes! When I do my own build, I'm planning on the roof slope being about the same as the latitude (43 degrees) and with the ridgeline running as close to E-W as possible since I want to do PV for backup power.
@@michiganengineer8621 I've been working on an energy study lately. I live in winnipeg, and I've been crunching numbers on a totally off grid structure.
It is very difficult, as we have very little sun in January and up to 1050 HDD. Because the limiting factor is winter, a very high angle is optimal.
Something around 70 degrees, also southern glazing is very important for heating, and a high SHGC combined with a low u factor is important.
I've been thinking about a home design with lots of southern glass, and a monoslope roof pointing south. You could do battery storage, solar, and solar thermal.
If you don't have net metering, you will want to generate energy when you need it the most, ex winter, and furthermore you will need to optimize it over annual generation. Probably mounting your panels on a rack will be necessary.
Unless you plan to insulate your hkme really well and use high effeciency appliances, you will have a difficult time harvesting the energy you need. Even in a warm climate like Michigan.
@@Bob_Lob_Law Net metering is available in most areas of Michigan, so mine would probably be a "hybrid" as far as electricity. About 6 years ago we lost electric for a week and a half just before Christmas, so a whole house (multi-fuel) generator would also be a must-have.
I just did my first metal roof last week with a contractor.. was a great experience. I will say getting the valleys to lay flat with no waves on the asphalt shingles was a little challenging. Also was so time consuming with all the cuts folds and bends vs the screw down metal roof.
Do you recommend ypur contractor I am in Orange County
Beautiful roof! Personally, I’d trim back the branches overhanging it.
Agreed. Need to get some arborists out there
With oak trees, any roof you put on will end up green.
I pressure wash mine once or twice a year :-)
😂🤣😅
I love the look. lets measure the TEMP ? Great to have SW visit and Sheffield consult . Matt sets the bar high!
I love the look of a black roof, if I were to reside I would do the same combo
Short answer: yes, it is dumb to put “trendy” colored roof, which also happens to be the hottest color, on a house in a HOT climate, and then have to cool said house.
It’s dumb if you don’t insulate your roof but in Matt’s case where he put insulation on top of his insulation and then he has his attic space insulated. He will be fine.
@@ykciR seems like a lot of trouble. Imagine the thermal efficiency with a white roof, plus all the insulation.