Spray foam insulation is made up of a number of different chemicals that react when combined together. The material starts off as a semi-wet cellulose material and the mixture is compiled on site and sprayed onto the area of application with a number of high-spec hoses. When the material hits the surface, a chemical reaction occurs that causes the material to expand rapidly. And we mean rapidly! This thing blows up faster than a balloon! This expansion can reach up to 100 times in size and happens in a blink of an eye.
Once enlarged the foam beings to harden almost immediately, creating a solid blanket of insulation that covers the entire surface. This material is completely safe to use around plumbing equipment and electrical appliances too, so there is no need to have these removed throughout installation. Just spray into the material into place and let it work its magic! So now you know the secret to how does spray foam insulation work!?