Ok, now i have a few questions on sub floor. This is my sprayfoam insulated floor
I was going to just do a reg plywood subfloor with nice birch ply(i think it has less glue, which means less off gassing, i think
But then thought, hmmm.... what if i used soft wood boards instead? No glue, no chemicals, no dangerous off gassing, since even small amounts can be dangerous in such a small space. It way more expensive but worth it to me. Well i went to home depot with the bus and fitted half the bus with boards and realized it was gonna cost $375 to fit the whole floor with this stuff.
. F*#k! Well then i went back to get more and came upon the aisle with foam boards and realized hmm what if i throw 1'' foam board insulation on top of the spray foam instead of ply or wood board, then just ad a floating finished floor over it, itll be a 60% saving. No wood means i dont need to coat it with any sealant which means less off gassing, i have a thing with off gassing u see. Less worry on mold and water damage, plus extra insulation, its a win win. heres the thing, if it were up to me id put the thinnest plywood i could over the spray foam and call it a day. I'm 5'11'', i dont have much head space left and adding yet another inch of subfloor, plus another inch for the finshed floor leaves me with one inch of head room. Not good. So i was wondering if i used 1/4 or 1/8(does tht exist?) plywood over 1 inch of spray foam insolation, then finished with 1 inch cork flooring, will that be enough to spread the weight around and avoid breaking down the insulation over time?
Here are my options. I dont think i will use 3/4 ply since it uses to much glue. Ill either use 1/4 ply or thinner, or foam board, pref the ply. SO my question is will the really thin ply hold or should i just go with foam boards instead