1st: Is there any acceptable reason why a builder would put ThermoPly Green Non-Structural vapor barrier up on exterior walls without putting Plywood, OSB, or other structural sheathing underneath?
Reason for question: While inspecting a friends house, new construction (wood frame, monolithic slab on grade, brick veneer) framing stage with roofing starting to go up I noticed the use of Plywood sheathing with ThermoPly Green on about 50% of the wall space and only the ThermoPly Green with no plywood on the rest. I could determine no rhyme or reason to where Plywood sheathing was installed and where only ThermoPly was installed. Unless this is a temporary measure to keep water out until a later stage in framing I can’t see how this could be acceptable. If it is temporary, I’ll have to watch closely to make sure they pull it off and put proper structural sheathing underneath and put new ThermoPly up over the sheathing. I tried to upload a few pictures but the msgboard does not like my 7.2 megapixel pictures and my photo editing software seems to reduce the pictures to fuzzy useless blobs when I try to shrink the pictures down to somthing the site will accept.