Polyurethane foam strengthens your home or building. Higher-density, closed-cell spray foam insulation inside your stud walls fully adheres to both the exterior sheathing and the studs, reinforcing both. With this added rigidity, there will be less wall movement due to wind, vibration and occupant activity. Additionally, your walls have greater than code-required resistance to "racking events," such as hurricanes or other strong wind situations.
SPF can also add structural strength to buildings. NAHB Research demonstrated SPF-filled walls could add from 75 percent to 200 percent racking strength to walls of OSB, plywood, light-gauge metal, vinyl siding or gypsum board.
Closed- and Opened-Cell Foam
Both types of foam are commonly used in most building applications, and the choice for which to use can depend on many of the factors discussed above. Some foams are inappropriate in specific applications. For example, you typically would not use open-cell foam below grade or in flotation applications where it could absorb water; this would negate its thermal performance because water is a poor insulator compared to air. Closed-cell foam would be a good choice where small framing sizes need the greatest R-value per inch possible. Closed-cell foam would be used for roofing applications. Call today to learn more details about the differences between these types.