Solar Reflective Roof Shingles | Future House | Ask This Old House
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- Опубліковано 28 сер 2024
- Ask This Old House home technology expert Ross Trethewey explores the design and testing of asphalt roof shingles that can reflect some of the sun’s heat away from the building.
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Ross toured the Saint-Gobain R&D Facility in Massachusetts (www.saint-goba.... The solar reflective shingles with 20% or less solar reflectivity that Ross saw are Landmark and Landmark Pro Solaris shingles. The highly solar reflective shingles with up to 40% solar reflectivity are Landmark Solaris Platinum shingles. These are all manufactured by CertainTeed (www.certaintee....
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Homeowners have a virtual truckload of questions for us on smaller projects, and we're ready to answer. Ask This Old House solves the steady stream of home improvement problems faced by our viewers-and we make house calls! Ask This Old House features some familiar faces from This Old House, including Kevin O'Connor, general contractor Tom Silva, plumbing and heating expert Richard Trethewey, and landscape contractor Jenn Nawada.
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Solar Reflective Roof Shingles | Future House | Ask This Old House
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Ross is a really good presenter. Just like his Dad. I always look forward to Trethewey segments. Keep up the good work!
Thanks JJ. Appreciate that!
@@rosstrethewey9391 It's a classic plumber's son's lament!
The concept of asphalt shingles (reflective or not) just seems like an archaic construction tradition.
Just like stick built construction and framing
Yeah, but it's cheaper...at least short term....so you know.....capitalism. yay.
@@user-dr2pg8fk2i Capitalism is actually what has allowed most technology to improve. This why computers, cars, cell phones, TVs etc have rapidly improved and are more affordable then ever before. What you just said is non sense and shows you lack understanding.
@@diegolara4202 you failed to recognize satire.
Meanwhile, I google earthed South Korea and noticed their roofs are green.
Literally.
What's up with that?
When they say “...as much % savings...” exposure (direction roof faces) is another factor other than just zone. To get those savings you’d need a mono-truss design with a southern exposure or flatt roof. Most consumers would see less.
Roof design can play just as big of roll in heat load savings by minimizing southern facing roof surfaces.
I have learned that a metal paneled roof with screws ( not "standing seam" which is 3 times the cost of a panels roof) is only slightly more than an asphalt roof. The quote i got was $700 more for the metal over the asphalt. The metal quote came in at $27100 for 67 square. ( a square in roofing terminology is 100 sf ) The main reason for the narrow difference is no removal of current asphalt shingles needed. The metal roof will go over the old shingles. I'll be going with their lightest color, polar white, to reflect heat. The surface is painted with Sherwin Williams WeatherXL, a silicone modified polyester or SMP. The brochure says the colors are available in Solar Reflective (SR) formulations. The brochure is unclear which colors or if all are done this way. I plan on calling.
I wonder how long Jen takes to make enough shingles to cover a typical roof.
Getting these installed today. And am really appreciative of the in depth analysis.
What brand
How has this worked out? I'm considering the same.
He looks so excited. Like a kid in a candy store
Ha so true. I do get really excited about these segments!
I don't have any problem with white shingles, why are there so many people object to that anyway? Personally, I think white looks prettier.
I'm no scientist (but my son is) but I used to work as a technician in an outdoor environment. I tried using beach umbrellas to help me shade myself during the hot summers. At first, I used colorful beach umbrellas but soon found out that it really didn't help keep out the sun's rays from heating up the area under the shade. I switched to the darkest single color umbrella I could find and noticed it was much cooler under the darker color. I have since used this theory for black sun block shades in my home. There is a significant difference in the inside temperature due to the darker color.
Try a two-ply design that's white (or silver!) on the outward-facing side, and black on the inward-facing side. That'll be even cooler.
@@seikibrian8641 No time to experiment anymore. I retired 13 years ago!
it was more likely the thickness of the material rather than the color. a heavy thick white canvas would have been ideal.
Prefer reflective tin, or copper roof. It's more expensive but the roof will probably out-live you, it'll add more value to the house than you spent on it after years of inflation, it looks great and I love the pitter patter sound in the rain.
Only standing seam metal roofs last long enough to outlive someone regular panel loc lose their color and don’t last what they’re supposed to and the screws become lose overtime
Shading the roof with a solar panel system reduces the attic heat and adds to the electrical boost of cost savings.
Let me know when there's a roofing material that gets dark in the winter and light in the summer, and costs no more than current asphalt shingles. :)
gotta start somewhere
That would be awesome. I suppose something could be made from e-ink panels that were reinforced somehow. Just flick a switch and it goes from mostly white to slate grey.
And a roof shingle that can collect the heat energy and store it… And not look like a solar panel.
This is what I was thinking... Reducing heat in the summer is great, but in zone 5b where I'm at we only have 3 months of summer, we might heat the house over 8 months out of the year and cool it for just 3.
I'm Canadian. All roofs turn white in the winter.
What about “solar panel” shingles?
Short answer - not worth it. These have only a minimal cost increase (10%-100%) vs solar generating shingles. Solar generating shingles have much more complex (and costly) installation, and less performance and much higher cost compared to normal solar panels. The main reason for them is if you want solar generation on your roof but don't want or can't have panels on them. Plus, keep in mind solar only generates when the sun is out. This means either expensive battery backup, deals with your power company or both.
Teed
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I thought the solar singles generate electricity.
no, you are thinking of Tesla's "Solar Roof" branding.
Great video. Amazing R&D tour. Thanks Guys.
While I think a solar roof with decent insulation is a better effort but it seems to me they should make a shingle that changes color depending on the temperature. So if it is cold it is black and if it is hot it is white.
Keeping cool is the main issue. A metal roof is only slightly more. See my comment. A solar roof is a lot more expensive than even a metal roof and solar panels are much more affordable than solar shingles.
What is the payback period for the two reflective shingles?
Go with metal. See my comment.
My roof 20k. With their best reflective product 40k. My electricity bill annually is 1350. Sounds like he is saying i could save 20% of that per year though not sure their math and assumptions. We are in texas. Saving $270 per year and 20k more is 6+ year return. 7 years if including opportunity cost of the extra 20k interest rate. Not the worst. Better hope hail doesn’t ruin it every year.
I’m curious how much relectivity you’d see just applying a coat of white paint over the first single. You still have more than half the solar radiation being absorbed in their singles, which seems high to me for “high solar reflectivity” singles. Would also appreciate an outdoor demo with temp probes under each shingle to really show the difference.
Considering the fact that we already have photovoltaic shingles, and these only increase the reflectivity by 10%, this seems like a really weak product. Unless, of course, they are about the same price as regular shingles, which I'm betting isn't the case.
I am going to develop a coloring changing roof material that will reflect heat in the summer and absorb heat in winter.
Also, it'll glow in the dark and have a button you can press to pump it up and everyone will think you're cool
KFC Manager How so?
Was expecting solar panel shingles. Are you going to do those sometime soon?
The Platinum Series are not in the catalog, the best I can see is 29% reflectance for Solaris in Mist White color. No 40% :-(
how do i find highly reflective shingles?
helpful in summer ... not so much in winter ... there are better ideas ...
In the S.F. Bay area the benefits of this are minimal. Its the few hot-air periods that cook us, not so much the sun.
That was pretty cool. 😎
So what effect, if any, do these solar reflective shingles have on bifacial PV panels?
"You sold pops" lol
brilliant !!!
You need to add in the cost of re-decking your roof every 15 years. The roof needs to heat up to dry out the plywood decking and prevent it from rotting.
Which heat block coating was used on the shingles?
What about cold climates where we WANT solar heat gain for most of the year (OCT-MAY)? This seems like a southern solution, that should have been made clear.
heating up your attic in the winter with the sun doesn't really heat up your house. a vented attic is gonna be cold in winter. you can let the sun in through windows to heat up the interior.
So why don't people like lighter colored roof shingles? Is it the green lawn effect, where people just feel like that's the way it's supposed to look with dark shingles?
In some Australia suburbs black roofs are not permitted - Seppos like black roofs for some reason sadly all the cookie cutter McMansions look the same
Dark shingles hide the dirt. A white roof after a few seasons would look like crap.
Lawns are green because grass is green. ;)
@@RobertLeBlancPhoto Yes but people have laws because there's a feeling that a house needs to have one. And most of that I'm sure goes back in time when only the wealthy had nice manicured lawns and gardens.
probably manufacturers get cheaper prices on darker ones and they tend to buy in bulk
Sold Pops!
How about solar siding?
Why don'tthey use reflectice luminium pellets?
We are relaxing a roof soon. I did a ton of research to try and make a good decision on brands.
I’m so Cal, electricity costs easily outpace increased heating costs.
Roofing brands and their solar reflective shingles
GAF HD RS (reflective series) or RS+
Owens Corning CoolMax
Certainteed Solaris
We went with certain presidential TL Solaris in charcoal.
Did you feel a difference inside the house?
@@TobyCostaRica they said we would but I don’t think so. I wish I had more objective measures
@@mrc79 Maybe your power use for HVAC went down?
As a person who lives in Arizona and in an newer construction home with tile shingles. Is there any material that you can spray onto the tile roofs which has the same reflectivity? This would work great in a home remodel but the newer homes are all built with tile roofs with Spanish style architecture. Infact so is much of southern California and new mexico along with Texas all new construction have tile roofs.
Its called paint
yes and no...;) Sure, you can 'paint', or better use a liquid-applied roof coating; but they are really designed for monolithic substrates - put them on shingles, and any differential movement could split the coating, allowing water _under_ the waterproofing - a big no-no. Adhesion also an issue (dirty/gritty surface vs. smooth and clean). Definitely check with manufacture's rep.
Another idea: just 'whitewash' (limewash) seasonally...like they do in the Mediterranean...;) Might be air quality issues (airborne lime dust)
I thought roofs were dark to lower heating costs lol
You would want darker roofs in the cooler states and white or reflective shingles in warmer climates. Just to give you a idea, I watched a different YT video where they were trying to paint all New York roofs white to save on cooling costs.
how much does the squad cost
Landmark?
So Ross can speak deutsch? Cool!
Its cold here longer than it is warm. I'll skip...
Bedouins wear black but stay cool because the heat dissipates within a short distance of the cloth...
"Bedouins wear black..."
It depends on the tribe and even on the individual. *Some* wear black, but traditional Bedu garb can be black, white, blue, grey, tan, gold...
@@seikibrian8641
You're kind of missing the point...
@@b_uppy No, I understood the point perfectly. But *you* were being inaccurate in making your generalization about Bedouins, so I corrected the misinformation.
@@seikibrian8641
No, the point was that despite their wearing black, they managed to stay comfortable. There was a study about it. They didn't discuss the other colors either, because it wasn't germaine to the topic. What I said failed to preclude other colors. You assumed my statement somehow said "they wear only black", or conversely, "all Bedouins wear black".
Noticed you "ignored" the assumption about Bedouins living in "hot places", too, lol.
@@b_uppy Yes, as I said, I understood the point that SOME Bedu are comfortable despite wearing black. That does not change the fact that not ALL Bedu wear black as your first comment implicitly stated. You wrote "Bedouins wear black but stay cool because the heat dissipates within a short distance..." You did NOT write "Some Bedouins wear black but stay cool because the heat dissipates within a short distance." You can try to weasel out of acknowledging your error, but it's there for all to see. I'm done with you.
Twice the cost though. Nice technology but 2x cost!
I really thought they were solar shingles
How is this future shingles? Where is the photovoltaic elements?
Just tell me how much and if government will give rebate
So this is an obvious scam. Commercial buildings are built differently than houses. Houses normally have unconditioned attics that require the temp in the attic to be close to outside temperatures to prevent ice damming during the winter, which causes roof failures. Yes the attic gets hot in the summer, but if you have a properly insulated attic space then those hot temperatures will never affect your conditioned space.
Depends on where you live and I guess I need some of your perfect insulation. A properly insulated attic that is hot is eventually going to transfer that heat into your house.
The best roof design is one where the insulation is at the underside of the roof sheathing; spray foam directly on the sheathing. The old school concept of a hot or cold attic that relies on ceiling insulation has been proven to be the wrong way to build.
How is this worth it? Why not just get solar panel roofs?
Because they're only 10% more expensive as a one-time installation, but reduce utility prices by 10% monthly. So a $6,000 roof will cost $6,600. But if your utility bill is $100 a month, it'll pay itself in 5 years aka 1/4 of it's anticipated life span and potentially sooner when you factor in utility prices.
As for solar, you still need a roof to put the panels onto and you will still need shingles or some other material. Solar shingles like those developed by Tesla are cost prohibitive and while they work, they are more of a solution for rich people who can afford the massive premium. While shingles like those made by Tesla do pay for themselves and add value to a property, they are still a new tech and it's way cheaper to get panels.
So you can go solar panels, but you need shingles. You can get solar panel shingles, but they cost too much and you might as well go solar panel and regular shingles unless you have money to burn.
Putting lipstick on a pig, asphalt shingles are like plastic knives. Metal roofing all the way.
It has nothing to do with people objecting to a white roof and everything to do with homeowner's associations. For bidding, you to have a white roof.
Dr Alaho Olu cured me from HPV
🤔 but still made of fossil fuels...😩
I still don't get the US' obsession with shingles that might give up to 20 years life rather than clay tiles or slate that will give 100 years or more like we have in the UK.
@@Kevin-mp5of seems like a false economy to me. Less strength, more work and cost in the longer term...
New roofs today though should get you at least 30 years. My parents had theirs replaced in 2017 and paid nothing because homeowner's insurance covered the price.
It's an american thing. Pay less now and then change it in 15-20 years to pay the whole thing again. Complete waste of money, time and material, hence why very few countries use them.
@@stevepasquarella823 Stating an exception, is just that, an exception. Also their homeowner insurance just went through the roof (no pun intended). Your parent's most likely have a house built in the 60-70's. Our house in France has a 300+ year old roof. Still completely fine. Every few years send someone up there to clean it.
@@shadowblack1987 Parent's house built in 1996 and no their homeowners insurance is a fixed price. All the homes in their neighborhood have been built between 1994-2002 and starting in 2016 I noticed many people began getting brand new roofs. More than likely homeowners covered it. Not everybody has $15-$20,000 laying around. Homes in the neighborhood range between $325-$550,000 or so.
They just start talking at the stairwell, go to a room, no one talks in the middle of the office not in a room
Reflecting heat away from the shingled roof a building or concerns with the high temperatures of the roof surface should be of no concern to a homeowner unless you have a flat roof. A properly engineered sloped roof over a properly insulated and ventilated attic space will not transmit heat to the living areas of the home. The roof surface should provide no heating advantage during winter months and no cooling disadvantage during hot summer months. Fix the roofing system rather than the surface of the deck, otherwise you just putting lipstick on a pig.
You are actually 100% incorrect. Multiple tests and studies have concluded 100% that the choice of roofing material (shingle, metal, foam, etc) all have a direct impact on the temperature of the outside surface and the inside surface of the roof as well as the temperature of the attic and the temperature of the ceiling of the house. Studies have also proven that an unventilated attic is more energy efficient than a vented attic.
This snake oil salesman lost me as soon as he mentioned that solar rays are reflected back into the sky - LOL ! Just waiting for someone to now say that this reflected light will harm pilots eyes if they where to be flying overhead. Do we expect these shingles to be twice the price - I mean Jen needs to maintain her beauty therapy.....
As opposed to reflected into the ground?
And I'm sure pilots fly over snowy areas all the time which reflectivity reaches upwards of 90% So I doubt some houses are really going to change what pilots feel.
It's reflecting UV light aka light that's beyond the visual spectrum. They also mention the shingles are 10% more expensive. However, they also reduce utility rates by similar amounts. It's one-time cost vs a reoccurring cost meaning the premium price pays for itself roughly after 5-6 years if you do the math.
Most of all though, you clearly decided to make this about Jenn who isn't even in the video which speaks volumes about you. Clearly you have some pent up rage about a gardener who you've never met. She's a professional who works hard, has her own business, and tries to help others.
I don't know what your deal is, but if you are acting like this, clearly you've lost your direction. I hope you find a way towards being a decent human being, because this world has enough toxic idiots who do nothing but tear down people for no reason. Keep down this path and the only friends you'll have are those in your head.
@@nramos33 - Oh Lordy Lord - calm the farm Dude !! You Seppos are in anxiety overdrive at the moment - sheeeshh - how about you take a chill pill and take your unicorn for a walk - I say this product is bogus - why don't they apply some actual 'Science' to collect their data rather than a spectrometer ???? if you don't understand what I mean let me explain - take temperature reading in a house with a black roof and then on a house with a roof covered in that wonderful product - of course you would need to have a control and the roofs must be all of the same size and pitch and preferably houses next to each other - having said that You don't know me and I don't know You - so have a nice day sending a cheery salute Your way - Your Welcome !!
@@nramos33 "It's reflecting UV..."
Actually, the benefit comes from reflecting IR energy, not UV.
@@serge.crispino418 1. WTF is a Seppo?
2. While you're right a lab test is not a sufficient proof of efficacy, of course they have to *start* there -- that's why they kept talking about this as R&D. That's how all R&D for new products has to work. And when Ross mentioned the average savings at the end, that's almost certainly based on experience from real houses.
3. Your original objection was that he said the solar rays are reflected back into the sky -- well, of course they are -- as other commenters have pointed out -- and you didn't reply to that point in your second comment at all, you just said a lot of buzz phrases.
4. You also didn't respond to Nate's comment about your obsession with Jen, who isn't in this video.