Open-Cell Spray Foam
Open-cell spray foam insulation is a spray-applied, half pound density, non-structural, thermal insulation material used in wall cavities, floor assemblies, ceiling assemblies and in attic applications. Open-cell foam insulation is a performance upgrade over conventional insulation that leads to energy efficiency, improved occupant comfort, a cleaner indoor environment and greater noise reduction for building/home owners.
Building envelopes with increased insulation levels are becoming standard practice. Consumers are increasingly involved in the selection of green building products due to rising energy costs and the recent availability of tax credits and energy rebates. Open-cell spray foam technology is a cost-effective solution to improve the energy efficiency of a building. The material expands 120 times its initial volume and fills cavities of any shape providing a continuous, protective air barrier that helps to minimize air leakage and air intrusion. Open cell spray foam insulation is the primary type of spray foam insulation we apply in attic applications. When applying open cell spray foam to the wall cavities there are two methods of applying this spray foam. Ideally, in a 2×6 wall cavity the preferred method is to apply the open cell spray foam to approximately 5″ while “leaving the skin on” which allows for the best air sealing qualities. Another common method is apply open cell spray foam insulation to expand outside of the wall cavity then shave off the excess foam to allow for the wall cavity and foam to be flush with the studs. This method is significantly more labor intensive and takes extra time to clean the excess foam shavings created by shaving the foam off. In either case, open cell spray foam is an upgrade from conventional fiberglass insulation.
For customers, viewing the choice of insulation is a good/better/best scenario. The use of fiberglass or cellulose is a good option, the use of open cell spray foam insulation is a better option, and the use of 2lb closed cell spray foam insulation is typically the best option for insulation.