What is Spray Polyurethane Foam?

Spray Polyurethane Foam (SPF) is an insulation product that is spray-applied in situ at a building site or residence. Two liquid components, MDI (A) and polyol blend (B) are mixed under pressure and sprayed onto a roof or wall cavity. The reacting liquids expand and solidify into a foam matrix creating a seamless seal. SPF adheres well to the area it is applied to, providing an air barrier that prevents thermal leaks.

The Two Types of SPF

Closed-cell foam (sometimes known as two-pound or medium density foam) has a high R-value of around 6 per inch. It acts as an air and vapor barrier. It also provides structural enhancement.

Open-cell foam (sometimes known as half-pound or low density foam) has an R-value of 3.6 per inch, and may act as an air barrier. It also acts as a noise absorber.

SPF: The Right Choice for Commercial Buildings

SPF provides insulation, air and moisture protection for many different commercial building roof and wall configurations. SPF use allows for flexibility of building design, reducing overall maintenance costs, and can extend the lifespan of the building.

SPF: The Right Choice for Residential Buildings

SPF seals wall and roof cavities to save the homeowner money on heating and cooling expenses. Not only does it provide thermal protection, it provides moisture and air barriers mitigating dangerous mold and wood rot of the structure.