Originally Posted by JewBrew
why not spray in insulation, You could spray in foam or cellulose. This way you wouldnt have to rip open the walls.
The cellulose stuff I saw is not designed to "stick". It's more for attics.
I just need to do the floor from underneath so i need a way to attach it. I could use a spray foam, but I believe this is pretty costly and would probably have to pay someone to come in with the machine.