Concrete slab garage floors, driveways, and foundations are usually six inches thick and demand wire mesh or rebar reinforcement to be sure it's sturdy more than enough to face up to the burden of heavy motor vehicles or possibly a home. I had been prepared to insulate my attic flooring, https://docs.google.com/presentation/d/e/2PACX-1vRj8CFavC1m3vHrtNagKkK97kkv5pL3M6tFAAu9f9AbnCvROfUuLXzsF6fZf3uwM9p7eQ9PH7SY888i/pub?start=false&loop=false&delayms=3000