Can TrueFoam Foundation Plus Type 2 rigid foam be used as a vapor barrier?
I am finishing the exterior basement walls in my new home. My plan is adhere rigid to the foundation walls, after that I'll be putting down dricore subfloor, then studding up 2X4 walls on top of the dricore. There will be an air gap between the rigid and the 2X4's as I am laying in R-20 "2X6" batts. Plastic vapor barrier will complete the system before the drywall.
My question is about the rigid foam. I've been told that as long as it's not type 1 EPS, it will act as a vapor barrier and protect against moisture. My local building supplier ensured me the Type 2 Foundation Plus by TrueFoam was the stuff I was looking for, and no vapor barrier between it and the foundation would be necessary.
I'm skeptical of this after looking further into the product. It claims "breathability" and the perfect rigid foam for EXTERIOR applications. However mentions nothing about its use in finishing interior basement walls.
Any help would be greatly appreciated. It's in my garage already purchased and I just have a feeling like it may not be what I need. Thanks for the help.
Posted Mon, 09/01/2014 - 17:49
Edited Tue, 09/02/2014 - 07:13
Other Questions in Green building techniques