We are building an addition ourselves (literally) and have researched foam vs fiberglass insulation. I would love to go with Foam insulation, but the price of it might put it out of our range. I know that foam insulates much better than fiberglass because it restricts air flow.
I was thinking, if I took the time to caulk every seam where the OSB panels meet, seal the top and bottom plates, pretty much caulk every gap – wouldn’t that eliminate all the air flow. I also have the exterior of the house tyveked.
Would this be a way we could use fiberglass and get close results to that of foam. In effect, If I do a perfect job sealing, there shouldn’t be any air flow – correct?