Foam insulation is an alternative to traditional building insulation. It is a two-part liquid compound that when mixed and applied it will expand, dry, and become inert. Just like traditional insulation, it can be used in attics, walls and crawlspaces.
It provides an air-tight seal that acts as a moisture barrier and deters mold. It can also reduce noise. Since it seals small crevices and cracks, it can provide better insulation against air flow and will stay in place once installed. It also provides zero sources of food for pests, so no need to worry about critters crawling in your walls.