Here is everything you need to know about DIY spray foam insulation. Closed cell spray foam density is measured by weight. For example, a 12-in. square box filled with 2-lb. density foam (fully ...

So if you are looking for a strong insulation, a closed-cell spray foam is what you want to grab. As for smaller fill-ins, an open-cell foam will do just fine. The post The Difference Between Open ...