Hello, Framing is done (knee walls, etc) for my attic. We are ready for insulation (closed cell sprayfoam is the only option because the rafters are shallow). Contractor is asking a lot for plastering, then I need to paint, etc etc. So what about 1/2 plywood to cover the sloped ceiling? The code required min 1/2", so it is ok, the ceiling is not longer than 8' and the rafter are about 16' a part (+ or -...it is a old house). It looks like full 4x8 sheet can do the job. I can cat in correct wide panels and attached on the rafters but...what about the seam? would it warp? Which Ply should I go for? Anybody who has done it upthere? If this is not the right place for my post please let me know and I will move it.
Thanks