(I can also tell you that 73% of all statistics are made up on the spot, so please don't ask for documentation of that statistic.). I think it is a bad idea. Thank you, Allison. Borrowing from a window construction concept, Suppose I use two 1 or 1.5 inch thick foamboards sandwiched with a small airgap in btwn, with sprayfoam around the perimeter, would that sandwiched airgap have any insulating value in itself assuming my perimeter is sealed perfectly? VERY cold winter. Allison, I would like to add one item to your list - make sure you use the right foam for the right area. Air Barrier - Leaks cost you a bundle. It's not foolproof to install, and its R-value per inch is pretty much the same as open cell spray foam - when it's installed correctly, which is almost never. It's supposed to be to be free of off gases after its cured. When spray foam goes bad … Spray foam isn't an inherently bad product, but it's pretty easy to botch if the hired company is inexperienced. Are there any considerations we should know about? Fiberglass may be foolproof to install, but then again it has a terrible R-Value compared to a good spray foam. Can cement block crawl space walls be sprayed with foam insulation? I did this partly because it's worthy of an article all by itself, but mainly I didn't include it because, despite all the warnings the two sides issue about the other, I've never personally seen a problem caused by using open cell where they should've used closed cell or vice versa. So spray foam is NOT the answer.. Nancy: I'm sorry to hear about your sister's home. He seems like a nice guy promising to do whatever it takes to fix any problems. Some people have the mistaken impression that if you get spray foam in your house, your home will outperform all others. What do you think? Contact a spray foam insulation lawyer for a free, no-obligation case … You can either change out the furnace to a sealed combustion unit or do your insulating and air-sealing at the flat-ceiling level. We have hired a contractor to enlarge our back door into a double French door. Brenda: Yes, you can spray foam on concrete block walls. How would you know? For example, when encapsulating an attic by foaming along roof rafters and decking, the entire attic must be sealed to bring the attic inside the thermal boundary. Several builders are cautious about using foam insulation and/or a closed attic. Service Experts Heating & Air Conditioning. Spray foam installers missed some of the air leakage sites. Flat or Lumpy - How Would You Like Your Insulation? I am mostly interested in the accoustc deading property of the foam I am considering as thick as three foot wall to wall spacing being filled with foam. I don't know what to do about the crawl space. Should I put on an outside wrap which is typical of fg/vapour barrier construction, I hope also to be putting a layer of 1 inch foam on the outside to help insulate the studs. They must be trained to do that as they spray. You may well have condensation problems. I inspected the entire crawl space of the house and noticed approximately (5) areas that were seperating and a couple areas where the foam didn't adhere to the block. Don't let him leave the vents open. The problem you saw with the closed cell foam pulling away like that is due to the heat of the foam was to hot. A little bit of uninsulated area like that adds up to a lot of heat loss/gain when the whole house has that problem, as it did here. If that's the case, you don't want spray foam on the roofline at all. This is in great contrast to my friend's experience. Has a measure of safety around high-pressure spray equipment. … Open cell foam usually fills the framing cavity completely, so it's easy to tell if the installer has sprayed enough. It's been an on going nightmare. “Homeowners who are exposed to isocyanates and other spray foam chemicals in vapours, aerosols, and dust during or after the installation process “run the risk of developing asthma, sensitization, lung damage, other respiratory and breathing problems, and skin and eye irritation.". Does my home qualify for Icynene Spray Foam Insulation? We would first like to state that not all insulation materials are the same; with Icynene being new to the market, it is regularly misunderstood and compared with other related materials like Polyurethane (which is where most of the spray insulation nightmares you’ve heard about come from). This method is proven to be Eco friendly, less expensive, keep your house out of danger! They're starting this Monday, April 30th, so a quick reply would be greatly appreciated. The spray foam industry should be controlled and regulated by the same standards, testing and inspections that framing ,electrical and plumbing are. It is sealed up inside the wall. My attached garage roof was sprayed also. I loved Tom's article! Steve: If your spray foam installer leaves the vents open, he will be committing the 2nd of the 4 problems I described above. Hey has anyone had problems with open cell spray foam insulation on the back side of garage doors. We live in the Northeast and having trouble finding out if spraying closed cell poly foam in the crawlspace under our bedroom floor is a health benefit or health hazard. On those super cold nights we heard "popping" sounds coming from the wall. Stayed in a hotel for 3 nites. Thanks Allison for your reply. The local foam installer that I used here in Hilton Head told me he looked for some peeling back of the foam. any thoughts? 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