Foam-LOK is the brand name for Lapolla’s spray foam insulation and roofing systems. Foam-LOK locks in energy savings by adding an exceptionally high R-value insulation system to the building envelope and the roof deck. This advanced insulation and roofing system is spray applied to any shape and substrate. It seals the building envelope to stop heat transfer through the roof deck, minimizes conditioned air from escaping, and restricts unconditioned air from entering the building. Video
Closed vs. Open Cell Foam
There is a significant difference between closed cell & open cell foam. Open-cell foam, contains tiny cells of the foam that are not completely closed. They are broken and air fills all of the “open” space inside the material. This makes the foam weaker or softer feeling than closed-cell foam.
Closed-cell foam differs in that all of its tiny foam cells are closed and packed together. They are filled with a gas that helps the foam rise and expand and become a greater insulator. These cells can be formulated to obtain many characteristics, the most common being size and density.
Density is measured by weighing one solid cubic foot of foam material. Open cell foams typically weigh in at 0.4 to 0.5 lb./cu. ft. Closed cell foam for insulation applications range in density from 1.7 lb./cu. ft. to 2.0 lb./cu. ft. Roofing applications typically use a 2.8 to 3.0+ lb./cu. ft. to support traffic and loads better. The higher the density the foam, the heavier, or stronger it becomes.
The advantages of closed-cell foam compared to open-cell foam include its strength, higher R-value, and its greater resistance to the leakage of air or water vapor. Open-cell SPF has an R-value around 3.5 per inch and typically uses water as the blowing agent. Closed-cell SPF has an R-value of around 6.0+ per inch (aged R-value) and uses high R-value blowing agents.
Spray foam insulation saves on energy costs and lowers utility bills. Studies by the US Department of Energy show that 40% of a home's energy is lost as the result of air infiltration through walls, windows and doorways. Buildings treated with spray foam insulation typically insulate as much as 50% better than traditional insulation products.
In addition to building temperature and moisture control, spray foam insulation is often used to reduce noise. Foam insulation serves as a barrier to airborne sounds, and reduces airborne sound transfer through a building's roof, floor and walls
In the United States, homes treated with spray foam insulation often qualify for state and federal tax deductions.