ABOUT SPRAY FOAM INSULATION: Liquid foam insulation materials can be sprayed, foamed-in-place, or injected. Their ability to fill even the smallest cavities gives them twice the R-value per inch than traditional batt insulation.
Liquid foam insulation, combined with a foaming agent, can be applied using small spray containers or in large quantities as a pressure-sprayed, (foamed-in-place) product. Both types expand and harden as the mixture cures. They also conform to the shape of a cavity, filling and sealing it thoroughly. Because the foam will expand and stick to virtually anything. It can be applied onto roof tiles, concrete slabs. crawlspaces, into wall cavities, or through holes drilled in into a cavity of a finished wall. Various methods can be used for application. The two component high pressure method is generally used in new home construction. It is a quick expanding type of spray foam. The two component low pressure spray foam is another method that is primarily for remodel jobs where there are existing walls with drywall already in place. This is also known as a slow rise formula and often referred to as injection foam.
Spray foam insulation can be categorized into two different types: Open Cell and Closed Cell.
OPEN CELL SPRAY FOAM INSULATION: Open cell is a type of foam where the tiny cells are not comletely closed. Open cell is less expensive because it uses less chemicals. It is a very good air barrier but does not provide any type of water vapor barrier. It is much more sponge like in appearance. It is often used for interior walls because it provides an optimum sound barrier. It is not recommended for outdoor applications.
CLOSED CELL SPRAY FOAM INSULATION: Closed cell foam insulation is a much more dense type of foam than open cell. It has a smaller, more compact cell structure. It is a very good air barrier as well as a water vapor barrier. It is often used in roofing projects or other outdoor application, but can be also used anywhere in the home.
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, like fiberglass. In addition, insulation that is sprayed in buildings protects against moisture, which provides the benefit of reducing the chance of harmful mold and mildew.
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.
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