Originally Posted by PavementPounder
How would I foam the entire area? All of the foams I've seen are only for small cracks. And it has to be able to stick to a vertical surface (insulating the floor under the family room).
I just stopped by Lowe's and priced out the materials. I only need 1 package of 6" batting (unfaced for crawl spaces) and 1 box of insulation retainers. $50 total. I doubt I can beat that price with any other material, and regardless of what I use, I can't get back there anyway.