Insulation Against Concrete Walls Basement
Closed cell spray foam is the best way to insulate concrete basement walls.
Insulation against concrete walls basement. Or you can leave a 4 inch gap between the studs and concrete wall and probably get away with it. Closed cell spray polyurethane foam or either xps eps or polyisocyanurate rigid foam. Inside the drywall is nailed to studs fastened flat against the block. There is a 5 inch gap to the wooden studs.
Concrete stone concrete block and other masonry foundation materials have very little insulating value a foundation wall can account for approximately 20 of heat loss. The key to successfully insulating basement walls is selecting insulating materials that stop moisture movement and prevent mold growth. The best way to insulate the interior side of a basement wall is with foam insulation that is adhered to or sprayed directly on the concrete. Space your studs either 16 or 24 apart.
When insulating concrete basement walls a good idea because concrete basement walls are often cold use rigid foam board insulation if the insulation will come into direct contact with the. This will allow you to cut your batts to fit comfortably between them. It can fill in all the gaps and spaces thoroughly giving you the best protection against moisture and air infiltration. This was a typical basement wall assembly with a stud wall directly against the foundation followed by fiberglass insulation and a vapour barrier.
Build a standard wall frame using studs around your basement and place them against the concrete wall. Insulation materials are the key. David caruso springfield pa. Adding insulation will keep your basement warmer make the floors above warmer and more comfortable plus it will lower heating bills.
The vapour barrier did not protect the exterior wall from damage and mold growth. That is if the studs are going to touch the concrete wall. This is because it can achieve a higher r value along with excellent moisture resistance with less thickness required. Most jurisdictions require a 4 mil plastic sheet vapor barrier for basement walls against concrete.
So you must assume that your concrete is fully saturated and full of water in order to properly insulate your basement walls. Notice the difference between the studs against the foundation and the studs that formed an interior division wall. I am about to put in the insulation and my contractor has recommended pink fibreglass batts between the studs leaving an air gap between the pink and the vapour barrier on the concrete. Any of the following insulation materials are acceptable for this purpose.
I have framed my basement walls vapour barrier is installed against the poured concrete basement wall.