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Spray foam on Stone foundation

4K views 4 replies 4 participants last post by  Windows on Wash 
#1 · (Edited)
I live in Ontario, and building code states that spray foam insulation must be covered by a fire barrier. We plan on only insulation 1/2 way down the wall due to moisture and allowing the foundation to dry. We don't want to attach a a stud wall to our concrete floor because of the moisture. What is the best way to cover our foam.
 
#2 ·
I have a stone foundation as well and have looked into this quite a bit. I am not a fan of the method you described because it has a large potential for problems due to the moisture. I will be waterproofing and insulating my stone foundation walls from the outside to stop the moisture and keep the wall on the warm side to avoid freeze/thaw issues.
 
#5 ·
There are some foams that are "fire rated" but whether that is acceptable per code for that area is up to question.

I would check with the code in your area and for you application.

Most foams that are left exposed in accessible locations require some sort of protection barrier.
 
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