Spray Foam

[Biggd]

Originally Posted by Sundancer320

Anyone have experience using the spray foam insulation under the cottage in the crawl space? We have about a 3’ crawl under our place built on post and pier and it has standard insulation batting that is falling out and looks like the rodents enjoy it. It’s coming out this week and think the spray foam is better suited.

I had the floor of a 12 x 22 room on piers sprayed with 3" of foam along with the basement walls of my house about 3 years ago. It was the best money I ever spent. No issues with critters, and I have many. If you're worried about critters you could get some metal screen/fence material and staple it to the floor joists after.
I'm going to do my garage next, walls and ceiling. I have the same issue, fiberglass insulation getting damp and falling down. Critters getting into it and making a mess.

[whkhawks]

Use closed cell spray foam. The animals can't get through it. A little more money but a much better product for crawlspaces. The product is also a great vapor barrier. Good Luck!!

[Lil' Barndoor Guy]

I recently put an addition on my island house and the Town of Alton insisted that I insulate the entire add-on including the floor joists