RoofingFoil - WATCH THIS BEFORE you buy a METAL or TILE ROOF!!
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- เผยแพร่เมื่อ 27 มี.ค. 2016
- If you're about to install a metal, tile or some type of slate roofing system that has a built-in air space, you have to install a radiant barrier! To find out why, watch this quick video. Ed shows how easy RoofingFoil™ is to install and what a big impact installing a radiant barrier in your new roof can make on both the comfort and efficiency of your home or business.
Purchase our Miami-Dade county approved all in one underlayment AND radiant barrier here: www.roofingfoil.com/shop/sing...
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You only get ONE CHANCE to GET IT RIGHT AND install a radiant barrier UNDER your metal or tile roof!! Don't blow it!!! www.RoofingFoil.com Tell us about your results here! Check out our Miami-Dade approved All-In-One Underlayment AND Radiant Barrier: www.roofingfoil.com/shop/single-sided-solid-foil-underlayment/
I didn't use their radiant barrier but I did install barrier prior to renovations and even after REDUCING my air conditioner by 20% to increase dehumidification time, the radiant barrier reduced my thermal load significantly! now I do have to install a dedicated dehumidifier since I am in the south, But the Radiant barrier is awesome! Between the radiant barrier, and smaller AC, Iv reduced my electric usage in the summer by about 25%! My system was tracked with a Flir Thermal camera and data logging thermostat.
Check out our new Miami-Dade County approved radiant barrier and underlayment here: www.roofingfoil.com/shop/single-sided-solid-foil-underlayment/
Thanks for the video. I will strongly consider adding roofing foil to my next project.
Check out our new Miami-Dade County approved radiant barrier and underlayment here: www.roofingfoil.com/shop/single-sided-solid-foil-underlayment/
I did all the tests on what he is saying and its 100% on the money no BS here.
Check out our new Miami-Dade County approved radiant barrier and underlayment here: www.roofingfoil.com/shop/single-sided-solid-foil-underlayment/
Hard working nice job
great explanation just love it.
Check out our new Miami-Dade County approved radiant barrier and underlayment here: www.roofingfoil.com/shop/single-sided-solid-foil-underlayment/
Can i cover the top of my roof with foiled stone wool? Our roof is covered in shingles and they never put any insulation on it
In a ventilated roof, putting the insulation on the roof is the wrong place. This is kind of like holding a jacket OVER your head-Why?? You "thermal boundry" or the box that you keep hot/cold is usually the FLOOR of the attic and this is where more insulation would go. For the roof, all you really need is to stop/slow the RADIANT HEAT and this is what product like www.RoofingFoil.com does. To slow down CONDUCTIVE heat you need "regular" insulation on the floor of your attic. So, radiant barrier is your 1st line of defense against radiant heat and regular insulation is your 2nd line of defense against conductive heat.
I am installing the foil right now 8/7/23. I could feel some difference already and because I am doing this on my own it is taking a bit longer. Living in California in the South end of the San Joaquin Valley this is going to make a difference on my electric bill.
Appreciate the comment! If possible, please write a Google review with your experience. Ed.
Great videos!
I’m going to install myself but my roof doesn’t have obvious air vents. Can you do a video discussing the different type of vents a roof can have?
Here is a video on roof ventilation: th-cam.com/video/NUvgeP7--0Q/w-d-xo.html Does this help? If not call us to discuss at AtticFoil.com we will be glad to help yo.
Great information. Thank you! If you have osb with radiant barrier installed as decking, is using your product or similar going to create any issues. Thank you again!
No problem at all. In fact, it works great. We have many builders who actually do both. With both layers, it's hard to tell from inside the attic if the sun is shining it works so well.
Cheers
Great video. Should you install the foil on the roof and in the attic, so you get better result? Thanks.
It won't hurt but once you install www.RoofingFoil.com the attic layer does not have much heat left to reflect.
What about hurricane-prone areas? Especially close to the Gulf Coast? I would like to use metal roofing but the use of battens will not hold down the roofing well in a high wind event. Also, I plan to use spray foam in the attic, so installing the barrier under the roof deck is not gonna work either. Is there any kind of solution for that? The roof sheathing will be glued and screwed (or ring shank nailed) for uplift resistance. The only solution I can think of is 2 layers of sheathing separated by an air gap. Or just skip the radiant barrier altogether.
Hurricane prone areas? Check out our new product: roofingfoil.com/48″-wide-roofingfoil-solid-underlayment-miami-dade-approved/
Is there a solution for those using shingles. I need to change my roof. My attic get so hot in our 110 degree Louisiana temperature. I heard Radiant barrier foil can be used under the shingles. But from what I heard on the video, there should be space between the foil and the shingles for this to work. What is your opinion and is there a solution to reduce the heat in the attic.
www.atticfoil.com/index.php/products/48-wide-double-sided-atticfoil-radiant-barrier-foil-perforated/ You can install inside the attic if you don't need a new roof.
I have an open beam ceiling in My Den that we are taking the roof off of on the outside. What insulation can I put down before the shingles go down because the den is so hot you can't even use it in the summer and it's so cold in the winter it's freezing in there and all the walls are insulated in there. I also have put in heat and air. What is the best insulation to put down on a flat top roof what is an open beam ceiling without destroying the ceiling?
About the only way is to build up the roof using high density foam board. You basically have a commercial roof application.
Do u have to use the felt paper with the radiant barrier or can u just use the radiant barrier over the sheathing and on wood planks can u use 1x4 or u have to use the 2x2
You can go with or without felt paper. The felt paper provides an extra waterproofing layer and can help reduce some condensation by keeping the deck a little warmer.
I am intrigued. I am in South FL and getting ready to have metal roof installed over my shingled roof after Hurricane Irma. What does this material cost a sq ft? Do all roofers have access to this material?
roofingfoil.com/48″-wide-roofingfoil-solid-underlayment-miami-dade-approved/
I want to put this on a shipping container which then will have metal roofing over it. Do you think best to attach right to the metal roof of container or over studs?
I would use the RoofingFoil plus some type of studs/battens to create the required airspace.
Hi, enjoyed this video, I do have a question though. I am building a new house with foamed attic. In the south with high heat and humidity. I have a good underlayment down rated for high temps. I was planing on a silver metal roof either on batons or directly to the roof. Would the metal be it’s on radiant barrier or would your product give a better result?
Steve, great question! Just because something is "Shiny" does not mean it reflects heat. Think of chrome bumper. Would not want to sit on it on a hot, sunny day. It sounds like you are doing things right. I have and love a foam encapsulate attic. But you still need a radiant barrier. Definitely do it right from the beginning and install battens and www.RoofingFoil.com any question call the office. This area is really my passion. We call it "high performance construction". You can see what I did on my home here: www.radiantbarrierguru.com/combining-radiant-barrier-with-spray-foam-insulation/ Thanks, Ed.
Can a radiant barrier be implemented when you use steel shingles? Also, if you have that radiant barrier, how does the roofing hold up when you walk on the roof such as for cleaning gutters, painting, scooping tons of snow off your roof? And how does the roof hold up to hail or snow since it has no solid backing? Might it be more prone to damage from the elements?
Steel shingles work great with a radiant barrier since they have the airspace behind them. As far as durability, every product is different, but in general they are designed to handle foot traffic. It wouldn't work if they got dented, or damaged overtime someone got on the roof. Same with Ice/snow. It would take a LOT of ice or snow to have enough weight to affect the roof. I'd think the structure would fail before the roof.
Question from the Philippines! Do you intall the radiant barrier on undernear your metal roof or on top of your insulation to keep out
The BEST option is to get it under a metal roof if you have that option. It's better to get the radiant barrier as far to the "outside" as possible. If you don't have this option, then a regular attic installation method with www.AtticFoil.com is the way to go.
Ehat if there are so many termites in our area? I dont want to use any wood just to creat air gap. What do you recommend?
You can use metal roof battens or hat channels.
I was telling my dad about this. I'm getting ready to replace my asphalt shingles with metal roofing and he's helping me out. He has over 50 years as carpenter/roofer and I've never roofed so I'm getting advice from him. He told me there shouldn't be anything over the insulation in the attic and that this might cause the metal to fail early if it's heating the metal up by reflecting the heat back into it.
I didn't know how to answer him. Can you help? I'm starting to rip the old shingles off in about 2 weeks.
Thanks for your question. This is common belief that the heat reflected will cause damage to the roof. However, the facts are that the roof OVER a radiant barrier usually increase less than 10 degrees. This is considered nominal and will not damage the roof. Here is a video showing the roof temperatures over a radiant barrier: th-cam.com/video/OHpyv_kxmoI/w-d-xo.html And our webpage with the info: www.atticfoil.com/index.php/knowledge-zone/knowledge-zone-learn-about-radiant-barrier/myth-or-truth-radiant-barrier-damages-roof-shingles/
Ed, I'm going to be doing a 14' cargo trailer RV conversion. Can you tell me how much of a gap (air space) you think would be minimum for the ceiling and walls? I'll probably be doing a rigid insulation (3/4" or 1") in both ceiling and walls.
1/2" minimum should work well.
Is the RoofingFoil replacing the felt paper or in addition to? If an addition, I assume the RoofingFoil would go on top of the felt?
It depends on the roofing system. Normally it will replace the underlayment, but on some systems like tile, you would use in addition to a traditional underlayment. Call us at www.RoofingFoil.com to discuss.
Our latest product: All in one Radiant Barrier AND underlayment: roofingfoil.com/48″-wide-roofingfoil-solid-underlayment-miami-dade-approved/
I have a flat roof, no attic, and am considering this method. The AC in the house is working too hard? My question is: what material would you recommend to use as top surface?
David, thanks for the question? It can definitely work on flat roofs. However, I really can't give you a good answer without more info about your project. Can you call us at www.RoofingFoil.com? Ask for Ed.
Is this needed or helpful on a metal roof application that has open cell spray foam under the roof?
Absolutely! This is the perfect situation where you want to use www.RoofingFoil.com. Basically, you want to build a refrigerator an put in the shade. The foam is your refrigerator. Great Job! You know a refrigerator in the shade will be easier to cool and more efficient. So, the radiant barrier will do this. Here is an article I did 10 years ago about combining spray foam and radiant barrier (not using a metal roof) on my home: www.radiantbarrierguru.com/combining-radiant-barrier-with-spray-foam-insulation/
Hello, I just purchased a 12 by 24 prebuilt cabin. What would be the best way for me to install radient barrier
What are you trying to achieve? Is the building insulated? Conditioned? Need more info.
Would you get a yield up of condensation/moisture in the cavity (air space) between the radiant barrier and roof tile in cold conditions? And if so, what would you recommend to combat such a problem?
Build up not yield 😂
Condensation is fact of nature. When the temperature of an item drops below the dew point, you get condensation. Even tree bark will get wet from dew under the right conditions. So, yes potentially there could be some condensation between the roof and the foil. Normally, it will dry or bake out after the surface temps are above the dew point. This is one reason for having an underlayment. It keeps the wood from getting wet due to condensation not just liquid water getting past the roofing layer.
roofingfoil.com
This looks great for hot environments. Can the roof still "breathe"?
Yes, this will not change anything to do with the attic ventilation.
what is the best way to vent a metal roof with the foil installed? I have a solar powered roof vent now. Also won't a white metal roof eliminated the need for the foil? Anyone have experience with white metal roofs? It is THE best for reflecting sun (and thus heat) from the roof and attic. also helps the environment.
What impact will a foil based radiant barrier on a roof have on things like cell phone signals, radio and tv antenna reception, and for that matter will a metal roof not also have a similar effect?
It really depends. I can have an effect. I really depends on how strong the signal is now. If you have a weak signal, It can push it over the edge. If the signal is really strong, then you probably won't have an issue. It would normally not have an effect on external antennas or dishes since they are above the foil. Cell signals can be questionable. However, a MicroCell is the way to fix this. www.atticfoil.com/index.php/knowledge-zone/knowledge-zone-learn-about-radiant-barrier/myth-or-truth-cell-phones-and-radiant-barrier/
So in the near future I'm going install attic foil. In 15 years I will likely have a metal roof put on. Is it a home run of an idea to add the roof layer on top of the deck while have the under rafter attic foil already installed? Or damaging idea?
You and do both and it won't hurt. Think of having two pairs of sunglasses. What get's past the first, will be handled by the second pair.
Will this barrier help hold heat inside of the buildings?
Absolutely, especially if you have a radiant heat source.
is this like that reflective bubble wrap i saw at lowes? how thick is this stuff?
No, this is not bubble foil. Basically, it's like a heavyweight/tearproof blue tarp with aluminum foil laminated on one or two sides. For this application, you simply looking for reflectivity not r-value.
Isnt there supposed to be an air gap under the radiant barrier so that it doesnt transfer heat to the decking??
No, the heat is being reflected. There is very little to transfer through.
Is there any benefit or detriment in the winter time trying to keep my home warm?
Not really, the roof is not really intended to perform as an insulator. In fact, you WANT the roof to stay cold to prevent ice damming. Your attic insulation is what helps keep the heat in during the winter.
Could you explain me why shouldn't i place the foil directly on the roof?I think the sun light is also the radiant heat,so the foil can reflect most of it .I ask you because my building is already build-up,it's a flat concrete roof, and i want to do it the cheapest way, so i think i just bond the foil to the roof like aluminum coating.
Thank you.
You CAN put directly on top of the roof. We have many customers who have used AtticFoil for outdoor applications with great success. Depending on the conditions I'd expect 3-7 years of benefit. If possible it would be better to lift the foil off the roof rather than bonding. You could use what's called "sleepers" to lay the foil across. 2x4"s or something similar. Then, depending on the wind, you will want to weigh down, or mechanically attach the foil to the sleepers or roof. I would also drill a few 1/2" holes through the roll before installing to provide plenty of holes for rain to drain through. There are many ways to do this. Basically, you will need to "rig" it. Here is a link showing Radiant Barrier Outdoor Applications: www.atticfoil.com/index.php/applications/exterioroutdoor-use/
hi , what happens if i glue together the aluminium coil direct to the bottom part of the metal roof and dont have the air space .does it work the same.? metal+glue+aluminum foil
thanks
If you glue the foil to the bottom of the metal and the foil facing away from the metal still faces an airspace then it will work. You must have an airspace on ONE side of the foil for it to either work off of the reflectivity or emissivity quality. You cannot "sandwich" the foil between two other products. Here is a vide explaining exactly why an airspace is needed: th-cam.com/video/aympJmf4bUU/w-d-xo.html
From my understanding that wouldn't work. But more interesting would be to have a weather resistant aluminium foil ON TOP of the roof, facing the sun... It would look a bit strange, all silvery, but in regions of extreme heat, who would care?...
So if putting on a new metal roof on a new house, could this eliminate the need for the felt paper?
Yes. In fact, we have a new Radiant Barrier Roofing Underlayment. It's an all-in-one product that was recently approved in Miami-Dade County (Hurricane Areas) for use under all metal roofs. www.roofingfoil.com/shop/single-sided-solid-foil-underlayment/
@@AtticFoil , link not working
do you use Single Sided or Double Sided barrier sheets, if double barrier, why for bottom space needed.
Single sided is all that is required with the foil facing up towards the airspace. The only difference with the double sided foil is that it CANNOT be installed wrong.
Ed, what is the smallest airspace above your radiant barrier? Is 1/4" too small?
1/4" will still work. It's about as small as I like to go. Vented works better than a dead airspace.
AtticFoil Radiant Barrier Foil Insulation : Thanks for the reply. I am using your R.B.F. under cedar shakes, and I am trying to keep the lowest profile.
What is temp rating for foil?
Over 250 degrees.
What if I already installed Attic Foil inside my attic? Do I need to install it on the roof too ? What would be the benefits if I did ?
Yes, I would install www.RoofingFoil.com on top of the roof given the chance. The attic install is good, but the above roof deck is by far the best. The actual roof deck will be much cooler.
Will the foil work with asphalt shingles with no air gap? thanks!
No, you MUST have an airspace on once side of the foil. It won't hurt to use foil, but it won't help with reducing heat flow either.
What if you were to go in your attic and put the foil across the rafters. Then you would have an airspace between the sheathing and the foil. Would it hurt anything to direct the heat back to the sheathing whether it be OSB or plywood?
So the air in my attic gets hot but the air between the tile/metal -roof and the roof deck does not?
I think you missed something. The attic air will be much cooler with a radiant barrier. The air temp between the deck and metal roof depends greatly on the ventilation between the two.
What about installing it on the inside of the attic? Of course that's because we do not need to change roof at this time.
www.atticfoil.com/index.php/products/48-wide-double-sided-atticfoil-radiant-barrier-foil-perforated/ Attics? YES, check out www.AtticFoil.com
so if you have a shingle roof, can you place the radiant barrier over the shingle or do the shingles need to be removed?
Usually you can go directly over a shingle roof without a tear off. Assuming the existing roof is structurally sound. atticfoil.com/index.php/applications/under-metal-tile-roofs/
I am not putting metal roof on house ,I am putting it on a carport .Which would be best .It is an A frame 24 x30 carport all wood with shingles that keep blowing off on 1 side .The guy wants to put down 1x4's over the existing roof and then attach the metal to that .This is an open carport
Putting foil below the 1x4's will reduce radiant heat from going through the carport.
What type of metal system is that at 0:27
Call us www.AtticFoil.com
Wish I knew this a few years ago.... my room is half above th garage and my floor, room just swelters to unbearable levels.
Kelly Crane you can still fix your problem from inside the attic space by installing a radiant barrier directly to your roof joists ,the most common type looks like bubble wrap but silver and you staple it directly to the roof joists ,the best from the roof travels up the barrier and out the ridge cap on the house ,I installed an internal radiant barrier inside my attic and it lowered temps from 147 degrees to 95 degrees .
www.atticfoil.com/index.php/products/48-wide-double-sided-atticfoil-radiant-barrier-foil-perforated/ This has been our main product for over 10 years.
can you use Reynolds wrap? also when installed should I put the shiny side up?
You could...in theory. However, AtticFoil is tearproof. Typical kitchen foil tears easy and would be very difficult to install. Plus, when you look at the Per Sq. Ft cost, I think AtticFoil may actually be cheaper.
Don't do it. Wrong product or the job.
How does foil reflect in the dark.
Radiant barrier reflects HEAT, not necessarily the light. Infrared Radiation is the INVISIBLE part of the light spectrum.
Thanks for the info. Will this work for siding
Yes - Siding Info Here: www.atticfoil.com/index.php/applications/house-wrap-behind-siding/
Can i use both on my tile roof : radiant barrier plywood + radiant barrier on top of underlayment. If just one is enough then which one to choose?
You can definitely use both no problem. If you have to choose one, then the www.RoofingFoil.com is the way to go. It will help keep the roof deck from ever getting as hot. With radiant heat, the further to the outside for the radiant barrier, the better. It's kinda like choosing to put a solar screen in the window of your car or parking under a tree. The tree would keep the inside of the car cooler.
I'm from tropical Sri Lanka. My question is whether there should be any ventilation in that air gap. Thank you.
Normally you want to combine radiant barrier with a ventilated airspace if possible.
Hi Janitha,
I am a builder, and just recently returned from a project there in Sri Lanka.
Two things I would add to the ventilation of a roof in Sri Lanka.
1) use a continuous screen at the bottom of your battens under your roofing, whether it is metal, tiles or asbestos concrete sheets. this will allow for any water to get out and for air to flow up, and to keep any crawly things out, and help keep the driving rain out.
2) Run a continuous ridge vent open and screened across the top of the roof, again with a screen for the same reasons.
3) I would also tape the joints in the foil to help with the water proofing.
Good luck.
Patrick
Dose this help with RF/ WiFi radiation?
This can be a little tricky. Generally, installing radiant barrier does not effect your cell signal unless the signal is really weak to begin with. However, although we don't promote the product as RF/Faraday Cage type product, we have had many customer buy a lot of product for this purpose. (whole buildings on interior walls, etc.) Because needs are specific, we recommend getting a sample or single roll and testing to see if it meets your requirements. Generally speaking, any pure aluminum product would reduce or eliminate RF signals.
Alex N Yes aluminum foil will block radio frequencies. As long as there are no gaps. In your house rf will enter through windows and walls unless there is aluminum foil there as well.
I used to install this in South Florida. we would cook in the summer in the attic. big difference once we finished the job. one attic went from 140 to 97 degrees on a 90 degree summer day. so I put it in our shed and our lawn equipment is in a much cooler environment.
Thanks for the feedback! We sell a lot of radiant barrier in FL. It's really a no-brainer where the sun shines all the time! If possible, can you send us some install pics? www.atticfoil.com/index.php/contact-us/
hi thanks for the video. do you have an email i can contact you with as i want to discuss lots of things.
thanks
www.atticfoil.com/index.php/contact-us/