Installation requires all walls and cavities to be exposed. The installation process consists of liquid polyurethane pumped onto surfaces and into cavities under pressure with a spray nozzle. The foam is very sticky, adhering to any surface, quickly expanding to form a continuous insulating barrier of millions of tiny air-filled cells. The foam fills all cracks, gaps, holes, nooks or crannies, eliminating air infiltration. Foam won’t shrink, sag, settle or degrade, is fire and insect resistant, aids in moisture control and can be used in any climate. Because it sticks to surfaces, it’s great for cathedral or curved ceiling applications.
The foam dries within minutes, usually expanding just above the surface of the cavity it fills. Installers must trim the surfaces flush with a knife after the stuff dries. After trimming, a thermal barrier wallboard covering must be installed, either by the homeowner, which can save on renovation costs, or contractor.
One of the biggest advantage of foam besides its high R-value, is saving time. Foam eliminates envelope tightening pre-installation steps, including caulking, gap filling and applying.
Because it is a spray and not a long piece of pink fiberglass, spray foam insulation gets into all of the tiny nooks and crannies, providing better insulation. Drafts are filled and the house is warmer in the winter. No cold air can escape in the summer either. In light of these facts, the homeowner with spray foam insulation can expect lower utility bills.
Spray foam insulation fills every little crack and crevice, so vermin and bugs have a harder time getting into the home, saving on extermination bills. In addition, it is such a great adherent, it can stick to a floor and insulate from underneath. Most homes insulated with spray foam have a higher resale value, especially newer homes. There are environmental advantages as well; most notably, there are not any fiberglass particles floating around in the air.