SPRAYED POLYURETHANE FOAM (SPF): SPF starts out as two liquid components- an isocyanate, known as the "A" component, and the resin (or polyol), the "B" component. When the liquids are mixed a a one-to-one ratio, a chemical reaction occurs and the mixture expands 20 to 30 times forming a solid, monolitic, seamless, closed-cell, fully-adhered roof system that provides excellent water-resistance and thermal insulating abilities.
SPF adheres to just about everything so it can be installed over concrete, wood, steel, and most existing roof systems, which saves on the expense of roof removal and landfill fees. SPF mechanics can spray-applied a tapered roof system with the foam, which eleminates the need for costly tapered insulation systems. The cants and vertical wall terminations are also spray-applied making them an integral part of the roof system and minimizing additional components costs.
SPF is applied at a minimum of 1" thickness and must be protected with elastomeric coatings. Elastomeric means the coating must be able to strech with the foam and return to its original shape. Coatings are spray-applied and can be acrylic, silicone, buyl rubber, and differents urethanes. Granules can be embedded into the mid and top coat or only the top coat for added protection against UV and mechanical damage and to increase the system fire resistance.
Foam roofs are very durable and can handle foot trafic and construction trafic. They are csttill susceotible to damage from dropped tools just as any other roof, but the damage is more easily seen and can most often be repaired with some simple polyurethane caulking.
Most SPF roofs have densities ranging from about 2.5 pounds per cubic foot to 3.0 pounds per cubic foot. Three pound density foam has a compressive strenght of about 50 psi and an R-value of 7.14 installed and 6.86 aged. This R-value means that a foam roof pay for itself.? Absolutly! Texas A&M studies indicate that an SPF roof in Texas and other southern climates can pay for itself in approximatly four and a half years, just with the savings on air conditioner. And a properly maintained SPF roof could last 50 years or longer!!.
email: sales@foammates.com CA. Lic. # 936533 C-39