My house has very small rim joists spaces in the basement.
I have noticed that the floors are cold, as are the walls. So I want to take action and this is where I thought to start.
My problem is that the space is maybe only 2" and quite deep, which is going to be very difficult to do the traditional way (using foam board and spray foam).
Should I buy some insulating spray foam and just seal the cavities? As far I know this is fine as long as it is air tight to prevent mold and such.
Any information would be super helpful! I included a picture, although it is not easy to see what's going on.
Best Answer
Yep, spray foam is the ticket. The conventional stuff expands greatly, so go easy until you get a feel for final volume. You'll end up using way too much and having a mess otherwise. You can certainly do it in layers.
Be aware that open cans can't be stored for longer than a few hours or so. They cure up and quit working. Don't start a can unless you'll finish it, or at least most of it.
Also note that urethane does not come off skin, clothing, and other objects. Protect yourself and your property before starting to spray.