Spray Foam Insulation Crawl Space Ceiling
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Closed cell spray foam has a higher insulation value.
Spray foam insulation crawl space ceiling. This type of insulation allows for conditioned air to be introduced into the crawl space. If you prefer to have a vented crawl space or a crawl space with uninuslated walls you can insulate the crawl space ceiling. If the crawl space walls are insulated and there are no open vents then there is no need for any insulation in the crawl space ceiling.
Spray foam insulation does not lose its r value over time. This usually requires less spray foam the area of the walls is almost always less than the area of the ceiling since it s always best if your ducts are inside your home s conditioned envelope you really want to insulate your crawl space walls. It is water resistant mold resistant and can provide insulation for over ten years.
Spray foam insulation is a permanent installation that does not sag over time when installing the product correctly. About r 6 per in as compared to r 3 7 per in. If there aren t any mechanicals or ductwork in your crawl space then your insulation contractor may recommend insulating the ceiling.
This type of crawl space also allows insulation with an r value of 19 installed in the floor joist if the crawl space and has a permanently installed dehumidifier. Spray foam insulation is a great product. Even in conditions of extreme cold there is no difference in its performance.
If there is ductwork in the crawl space and the insulation is installed on the ceiling it won t perform the way it should. Homes insulated with it can be some of the most efficient and comfortable homes built. The insulation belongs on the crawl space walls not the crawl space ceiling.
Foam board insulation is attached directly to the exterior structure walls of the crawlspace. However in the long run the costs vs value over traditional insulation outweighs the costs with yearly savings. I can also tell you that 73 of all statistics are made up on the spot so please don t ask for.
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