Warning: A building inspector in Phoenix told me my vapor barrier seams were 'just for show' last month.

Honestly, after he pointed out the lack of proper tape and sealant on a 15,000 sq ft slab, I switched to a 6-inch overlap with double-sided seam tape and now I check every single joint myself.

2 comments

2 Comments

umac7115d ago

Good on you for fixing it, but a 6-inch overlap is overkill for most vapor barriers. The standard is usually a 4-inch overlap with proper tape. Double-sided tape is solid, but you gotta make sure it's the right kind for the plastic you're using.

diana15514d ago

Guess my vapor barrier is just built different, like a luxury sedan with extra seams. Gotta have that six-inch safety net for when the house decides to start sweating. At least the tape bill will keep me humble.