Closed cell polyurethane foam (ccSPF) is typically used in commercial installations and exterior residential installations due to its excellent water resistance and low vapor permeability, as well as its rigidity and its superb insulation capability. The average R-value of closed-cell spray foam insulation is around 6.5, making ccSPF among the very best insulators available.
The structural strength and water resistance of ccSPF makes it an excellent choice for low-slope commercial roofs. When paired with a UV resistant coating, the light-weight, rigid structure of the foam will provide dependable protection for decades through all kinds of Texas weather. Because it’s self-adhesive, spray foam roofs even eliminate the thermal bridging caused by roofing nails or adhesives used in other forms of exterior insulation.
In residential applications, closed-cell foam is equally effective in exterior installations due to its superior performance when in direct contact with water. It’s especially valuable used around exterior ducts, chimneys and flues, as well as under roof flashing and exposed soffits.
Exterior usage of closed cell spray foam insulation also increases the resiliency of your home against seasonally harsh weather conditions in Dallas, Texas.
Because ccSPF is such an effective air and moisture barrier, when it’s used to seal air gaps beneath eaves and roofing joints it reduces the ability of wind to uplift roof decks and shuts out driving rain from attic insulation and crawl spaces.
Though it is well-suited to exterior applications, ccSPF has advantages when used for interior installations as well. Unlike other kinds of insulation, closed cell spray polyurethane foam forms a monolithic, continuous material that increases the structural stability of interior walls and acts as a sound dampener.