Basement vapour barrier
Brand new to the site and first want to say “ what a goldmine of building knowledge”! My question is about a recent article I read regarding insulating basement walls. On a current build of mine, I’m trying to adopt some of the teachings here by installing 2” eps rigid foam to the foundation walls sealed at every joint and seam. 2 pound closed cell will fill my joists spaces and tie into the rigid foam. Then 2×4 frost walls in front of the eps with R15 batts. Next, we are expected to apply a 6mil polyethylene vb fully taped and sealed with acoustical sealant as per code. With that said, an article I read by Martin Holladay simply says the poly is a bad idea. He explains it well and I understand but the City inspectors will not pass inspection without it. I’m thinking of using Certainteed Membrain? Any suggestions would be greatly appreciated.
Paul (Freezing in Climate Zone 8 – Northwest Canada)
GBA Detail Library
A collection of one thousand construction details organized by climate and house part