Wall Foam non-expanding foam is the product of choice for the following applications:
Wall foam can be used as an insulating and air sealing product for residential wall and ceiling cavities. The insulation is sprayed, via special equipment, into wall cavities and expands to fill all the nooks and crannies in a wall cavity. Excess foam is scraped off the studs to form a uniform wall cavity. Wall foam insulation makes it easy to completely fill wall cavities with insulation and to perform air sealing in the same step.
The two types of spray foam Seal Tech uses are open-cell (isocyanurate) and closed cell (polyurethane). The closed cell foams typically have a higher R-value than open-cell foam. Wall foam insulation is applied as a liquid which contains a polymer (such as polyurethane or modified urethane) and a foaming agent. The liquid is sprayed through a nozzle into wall, ceiling, and floor cavities where it expands to fill every nook and cranny. Because it expands into tight areas, sprayed foam is ideal for insulating steel framing and around outlets. By acting as a wind and air barrier, it often eliminates the need for separate air-tightness detailing which can increase energy efficiency and allow downsizing of the heating and cooling system equipment. Wall foam insulation does not shrink, sag, settle, or biodegrade.
Wall foam materials cost more than traditional fiberglass batt insulation. However, since wall foam forms both an insulation and an air barrier, it can be cost competitive with batt insulation because it eliminates the steps for air-tightness detailing (such as caulking, applying house wrap and vapor barrier, and taping joints). As a result, it also reduces construction time and the number of specialized contractors.
Many wall foams are environmentally friendly. Most of them do not contain HCFCs that are harmful to Earth's ozone layer, or off gas formaldehyde—a potentially harmful volatile organic compound. Polyurethane foam insulation has about twice the R-value per inch of traditional batt insulation, making it more energy efficient in a smaller space.