can you put radiant barrier over insulation

The results have been spectacular. For any climate that is installing radiant barrier on the attic floor over insulation, we recommend our SuperPerf product which is designed for maximum breathability and performance. Yes, you can put radiant barrier foil under metal roofs. Learn more: https://youtu.be/IJM8f-eazrsShop for SuperPerf Radiant Barrier for Cold Climates here: https://atticfoil.com/index.php/superperf-radiant-barrier-foil-cold-mixed-climates/ In areas of cold weather, this can not be emphasized enough. The radiant barrier can reduce the amount of heat transferred to the attic from the roofing, which increases the efficiency of the HVAC equipment and can result in small to modest cost savings, depending on many construction and enclosure variables. The SuperPerf foil helps minimize the convective looping within the insulation. Because radiant barriers are made of metal foil, they will conduct electricity. If you have batt insulation, try purchasing an extra batt and tearing it into golf ball sized chunks and sprinkle them over the batts to create peaks and valleys. Because then there is no air gap above the foil. If youd like to see some examples of successful attic installations where the foil was laid on top of the insulation, check out our customer DIY Project Gallery. If you recall, I did a full foam encapsulated attic with a double-deck / radiant barrier skin. The best thing you can do to make sure you have an optimally performing attic is to air seal! Off to D.O.E. You can follow him on Twitter at @EnergyVanguard. This method can be used in any climate, though it historically has been most popular in colder climates. Sample Reports. He has a doctorate in physics and writes the Energy Vanguard Blog. Cut pieces outside the attic. They work by reducing the radiant heat that comes into an attic or other . Radiant barrier foil does not cause moisture. For the same performance improvement, radiant barriers always cost more than insulation. Find real estate questions & answers. Radiant barrier is best suited to attics. https://atticfoil.com/index.php/installation/over-the-insulation-install/Ed discusses the biggest energy efficiency mistake in residential homes and how to e. Share insights and experience. Remember, you do not have to tape the foil together; the pieces of foil will usually overlap one another by a couple of inches. Installing a radiant barrier is not a difficult process, but it can be a time-consuming and messy one. Do not press it into the insulation. Check with them about warranty issues. In his case, they didnt do it to have more options. Lay the radiant barrier foil loosely over the attic insulation. Emails are serviced by Constant Contact, 2021, Energy Vanguard | 533 West Howard Avenue, Suite E, Decatur, GA 30030. Paul, Allison, I wanted to send youAllison, I wanted to send you a follow up on the emails we exchanged last year. Are you sure you want to report this blog entry as spam? Why, HomeKeepr, of course! Ideally you want about 10-20% surface contact with the foil. (The ONLY way to go on high performance construction) The air quality has been great! RadiantGUARD radiant barrier foil insulation installed in an attics can reduce attic temperatures by up to 30 degrees when stapled with a staple gun to the underside of roof rafters by REFLECTING up to 97% of the radiant heat that strikes its surface thereby reducing heat transfer from the attic to living spaces resulting in lower utility bills. Also, please take time to read the warnings at the bottom of this page regarding installing foil directly over attic insulation in cold climates. Before laying the plywood I was considering a radiant barrier over the built up truss/insulation and then placing plywood directly on top. Make it a great day! If anyone wants more information on what I did, feel free to contact me at AtticFoil.com. Tip: Use a pole with a nail taped on either end to push the foil out the the edges that are beyond your reach. Just log in and ask for a recommendation for the best insulation installer in your area, and before you know it, youll be reaping the benefits of an attic with excellent protection against radiant heat. Ideally you want about 10-20% surface contact with the foil. You can easily stab the foil and move it far back into hard to reach areas. Yes, you can install the foil directly over your existing attic floor decking*, it can handle light to moderate traffic. Where will you find such a person? Then, start at the furthest point (from the attic entry) and work towards the exit. For more information about having radiant barrier installed in your home please call 602-499-2922. The truth is that theres another step in the process that many homeowners are overlooking, and its both easy to install and inexpensive: a special kind of foil called a radiant barrier. His intention was to put the Techshield up there, and then that would give him the option to go either way: an unconditioned attic with a radiant barrier or a conditioned attic with spray foam insulation at the roofline. They work by reducing the radiant heat that comes into an attic or other space. Instead of the wanted effect of cooling the attic, in these homes, the radiant barrier instead interferes with the insulations ability to work properly. Barrier Insulation offers Radiant Barrier installation anywhere in the Phoenix Valley. Its an either/or choice. Nov 03, 2022. Here is the page for this with a video and pictures: . Yes, you can install drywall over a radiant barrier . Does the foil, despite looking high tech, add to, or perhaps even detract from, the insulation value of the product? This will form one large piece of foil that will cover more area, more quickly. Is Wind Washing Reducing Your Insulation R-Value? When you install a radiant barrier, its really important to not only pay attention to which side is up on the barrier material, so the proper side faces the roof, but that you install it in such a way that it wont be contaminated with things like dust and other debris. Used alone or in combination with traditional insulation options, radiant barriers can help control the temperature inside your home or other structure and reduce energy bills. That doesnt mean you cant add one, though. Great information. Equal Housing Opportunity Disclaimer: All information on this site is subject to change and should be independently verified. Yes, you can install drywall over a radiant barrier . Professional installers typically charge $30 to $80 per hour for this job. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); HVAC Design Installing a radiant barrier is not a difficult process, but it can be a time-consuming and messy one. Why? System Replacement Subscribe to the Energy Vanguard Newsletter. Remember, dont cover up or block your soffit vents when youre laying the foil down. Pumpkin Spice: Its Not Just for Lattes Anymore, Ionizer Company Sues Indoor Air Quality Expert, The What, Why, and How of the Corsi-Rosenthal Box, A Continuous Air Barrier Between Garage and House. 1000 streams on apple music. If youre not sure youre ready to install a radiant barrier yourself, or youre concerned about getting it just right, it might be better to hire a professional to get the job done. The more dust and material that collects on a radiant barrier, the less effective it will be. Great information to share with us here in the Rain. Radiant Barrier Under Metal and Tile Roofs The radiant barrier acts as your first line of defense against radiant heat and the foam closed attic acts as the second line of defense against conductive heat flow. I wrote about how radiant barriers work not long ago, and when you put a radiant barrier in contact with other materials on both sides, heat just conducts right through it. You can also choose insulation with a radiant barrier built-in, called reflective insulation, where the barrier acts as the facing material. In the past, some people have installed radiant barriers on top of their insulation, but this has proven to be a poor way of installing the material. Just roll the foil up like a big rug, take it into the attic and roll it out. This would then include all those foil coated polyisocyanurate foam boards and such. Good attic ventilation is important because air moving through an attic helps keeps the air temperatures cooler and helps to remove moisture. Another option is to pull the foil into the corner. You dont have to cover every square inch of the attic for the foil to work. A perfect home would be built like a well-insulated refrigerator and be wrapped with radiant barrier foil insulation. When roofing materials get hot from sun exposure, that heat eventually transfers into the attic via radiation. Specials; Thermo King. If youre not sure youre ready to install a radiant barrier yourself, or youre concerned about getting it just right, it might be better to hire a professional to get the job done. Radiant barrier spray costs $250 to $400 for materials to cover 500 to 2,000 square feet. Tip: Worried about dust accumulation on the top side of the foil layer? How long will it take to pay off my credit card? For more info on managing moisture in your attic read our page on Moisture & Radiant Barrier Foil. Do not push the foil down into the attic insulation. YOUR Rock-Solid Choice Realtor for Making Home Sellers a Profit & Home Buyers Equity. Since they also tend to act as a moisture barrier, radiant barriers can also trap moisture inside attic insulation, causing all kinds of other problems. When installing a radiant barrier . So, to slow or even stop this process, a barrier thats designed to reflect that radiant heat back out of the attic is necessary. These leaks should be sealed up before installing foil. Common sense says that a refrigerator in the shade will use less energy than one in the direct sun. We have a pretty good passive solar design too. You can use these pieces to work sections. This will reduce the drying potential for the insulation, and reduce its overall effectiveness. Some studies show that radiant barriers can reduce cooling costs 5% to 10% when used in a warm, sunny climate. Attic flooring/decking. If you are installing the foil over a standard sheetrock ceiling with no holes/penetrations, then the foil will handle any residual moisture vapor passing through. Allison A. Bailes III, PhD is a speaker, writer, building science consultant, and the founder of Energy Vanguard in Decatur, Georgia. Or so weve been told. The material is sold in rolls, and is quite easy to install. In many areas of the country, you can get R-38 of cellulose installed on your attic floor for $1 a square foot, and R-38 of blown-in fiberglass can be as inexpensive as $0.60 a square foot. Overlap the foil sheets about 1-2 inches and use small pieces of foil tape to attach the pieces together. Will this work? So, to slow or even stop this process, a barrier thats designed to reflect that radiant heat back out of the attic is necessary. The Emotional and Non-financial Benefits of Homeow, Millennials Are Still a Driving Force of Todays Bu, If You Think the Housing Market Will Slow This Win. If you are an HAR Account subscriber or a member of HAR, please click, -------------------------------------------------. You can super-perforate this roll on your own. Radiant barriers arent much to look at. Use a 1/8 drill bit and drill lots of holes from the outside through the core of the roll. They just didnt know. After all, youll need to be in your attic for prolonged periods, working with a sort of heavy foil material that can be cumbersome for a single person to manage. Are Radiant Barriers Cost Effective in New Homes? Recently, with temperatures at 100 I have had a max temperature between the top deck and the foam at about 185 and the temperature between the bottom deck and foam at about 125. When roofing materials get hot from sun exposure, that heat eventually transfers into the attic via radiation. The problem with this product is that it only works to prevent radiant heat transfer; it does nothing to prevent convective heat transfer, conductive heat transfer, or air leakage in attics. Then, use a pole with a nail to push it around until it covers the area intended. Leave an anonymous comment or Log on to ActiveRain to comment as a member. Here is some good information on how you CAN get radiant barrier to the outside of a foam closed attic. The more dust and material that collects on a radiant barrier, the less effective it will be. How much will I need to save for a major purchase. Does foil in the attic work? Just log in and ask for a recommendation for the best insulation installer in your area, and before you know it, youll be reaping the benefits of an attic with excellent protection against radiant heat. Just tape a couple of pieces of foil together and let it roll down into the hard area to reach. Many homeowners dont consider this when installing them and may overlook serious hazards like contact with bare wire or old wire with failing insulation. Once youve finished the large open areas, go back and attempt to cover any smaller or hard-to-reach places in the attic that you skipped over. The truth is that theres another step in the process that many homeowners are overlooking, and its both easy to install and inexpensive: a special kind of foil called a radiant barrier. When you install a radiant barrier, its really important to not only pay attention to which side is up on the barrier material, so the proper side faces the roof, but that you install it in such a way that it wont be contaminated with things like dust and other debris. When installing a radiant barrier, hanging it along the contours of the attic roof or rafters is your best bet, but youll need to let the material droop slightly between attachment points to create a 1-inch air gap between the material and the bottom of the roof. Im teaching a HERS rater class this week, and on Monday we went out to look at a couple of houses and do a Blower Door test. Radiant barriers can be used in attics, walls and floors following specific instructions to increase their efficiency. When installing a radiant barrier, hanging it along the contours of the attic roof or rafters is your best bet, but youll need to let the material droop slightly between attachment points to create a 1-inch air gap between the material and the bottom of the roof. 26 advanced framing, exterior foam board to reduce thermal bridging and aRadiant Barrier House Wrap. But they make up for looks in performance. For stapling foil up, you need the flat square footage of the attic space (length x width) and then you will need to multiply that number by one of the following pitch factors: LOW: Roofs under 8 ft tall from inside the attic = Sq Footage x 1.2. The attic stays at about 78. SUBSCRIBE TO THE ENERGY VANGUARD NEWSLETTER! Radiant barriers are more effective in hot climates than in cool climates, especially when cooling air ducts are located in the attic. According to Energy.gov, a website produced by the US Department of Energy, radiant barriers can reduce cooling costs by up to 10% in sunny climates, and may even allow a homeowner to install a smaller air conditioning system, saving additional money over the longer term. After you cut several pieces, have your helper bring the pieces of foil up into the attic. What's the reason you're reporting this blog entry? If you've ever been told that foil works if you put it under shingles, this video is for you.Ed finally debunks the myth that radiant barrier works directly . https://atticfoil.com/index.php/installation/over-the-insulation-install/Ed discusses the biggest energy efficiency mistake in residential homes and how to easily fix it so your home is more comfortable and energy efficient all year long.For customers who live in COLD CLIMATES and are considering this installation method but have moisture concerns, please check out our SuperPerf radiant barrier that was developed to lay on top of attic insulation but is guaranteed not to trap moisture! Data Collection If you have large, open areas in your attic consider this trick: cut the foil on your driveway (or yard) and then tape 2 or 3 pieces side by side to make either an 8 or 12 wide piece. Radiant barriers are essentially bubble wrap covered with foil on both sides. Many houses lack radiant barriers, either because it wasnt invented when they were built and no one thought to add it later, or because the climate where they were built was once considerably cooler than it is now. Then pre-cut the pieces to fit this length. Building Americas mtg in Denver 8/9-8/11. SuperPerf compared to Original AtticFoil: https://youtu.be/IDtodOepWPQWhy You Need SuperPerf Radiant Barrier: https://youtu.be/SItSdXMx_HUHow to Install SuperPerf Super Breathable Radiant Barrier: https://youtu.be/NxlwyKSwMfkWorried About Dust Accumulation? No. But its definitely possible as an advanced DIY project. This is easy to do and makes a truss install go much faster. Tip: Foil radiant barrier does not cause moisture. Yes, right on top of the radiant barrier. The reduced heat gain may even allow for a smaller air conditioning system. . Count your rafters in the attic. It is not necessary to attach the pieces, but many people will do this to hold the foil together. Or so weve been told. Filling all the gaps and keeping all the climate-controlled air where it should be is a huge part of creating a home thats not only comfortable, but efficient. Hello Shayne and Happy Birthday to start with. That doesnt mean you cant add one, though. In the past, some people have installed radiant barriers on top of their insulation, but this has proven to be a poor way of installing the material. Although we have super-perforated radiant barrier foil, there is a potential for moisture to condensate if too much warm moist air is leaking out through the ceiling of the home. Most popular method for HOT attics with a/c ducting. 48" Wide Perforated Double Sided Radiant Barrier Foil - Best Selling, 26" Wide Perforated Double Sided Radiant Barrier Foil - For Trusses, 60" Wide Perforated Double Sided Radiant Barrier Foil Super Wide, 45" Wide Perforated Double Sided Radiant Barrier Foil - SuperPerf, 48" Wide Radiant Barrier Foil + White Vinyl Perforated, Perforated House Wrap Radiant Barrier Foil 48" Wide, Perforated House Wrap Radiant Barrier Foil 60" Wide, Solid Double Sided Radiant Barrier Foil 48" Wide, Solid Single Sided Radiant Barrier Foil 48" Wide, Radiant Heat Flooring Over Non-Conditioned Spaces, Radiant Heat Flooring Over Conditioned Spaces, Dust Accumulation and Double-Sided Radiant Barrier, eliminate the air gap, the foil is useless to block radiant heat, warm moist air is leaking out through the ceiling of the home, SuperPerf AtticFoil is punch-perforated and extra permeable, download printable install instructions for this method. This includes another sheet of plywood, insulation, storage, etc. The cost to install radiant barrier insulation runs from $740 to $2,840 or $1,700 on average. You might have an area with a ceiling that tapers down and is very hard to reach. Mixed & cold climates with no ducts or storage in the attic. Get answers, ask questions and more. Where will you find such a person? I had radiant barrier paintI had radiant barrier paint applied several years ago probably about 7 years am thinking of adding foam to the entire decking and attic walls.The radiant barrier from what Ive heard does deteriorate with age.Is there a problem with doing that?

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