I don’t recommend spray foam for a number of reasons, a few being that it offgasses VOCs after installation and can obscure or make future access to repairing surfaces impossible. If, for instance, water in your bathroom seeps into your subfloor, that repair becomes suddenly infinitely more complex if you have to fight through spray foam.
I highly recommend mineral wool batts, even if you do thin ones. They can be cut with a thrift store bread knife/any serrated knife and friction fit between the joists. Very easy install for an amateur, very forgiving. Save the spray foam for those tricky gaps next to doors and windows.
We bought ours from a local contractor supply store, and it was cheaper than Orange or Blue store and they delivered
for free. Not sure where you’re at but search around.
I don’t recommend spray foam for a number of reasons, a few being that it offgasses VOCs after installation and can obscure or make future access to repairing surfaces impossible. If, for instance, water in your bathroom seeps into your subfloor, that repair becomes suddenly infinitely more complex if you have to fight through spray foam.
I highly recommend mineral wool batts, even if you do thin ones. They can be cut with a thrift store bread knife/any serrated knife and friction fit between the joists. Very easy install for an amateur, very forgiving. Save the spray foam for those tricky gaps next to doors and windows.
We bought ours from a local contractor supply store, and it was cheaper than Orange or Blue store and they delivered for free. Not sure where you’re at but search around.
Yeah the spray foam is not the answer for large areas. It’s for touch up after the fact. You may want a can of it at the end.
Use a wool insulation like this dude said