CertainTeed Corp. (Valley Forge, Pa.) reports that its CertaSpray® closed-cell spray polyurethane foam (SPF) insulation has met the Florida Building Commission’s 2007 Florida Building Code Performance Standards for wind-uplift resistance.
The company said that, when applied directly as a three-inch fillet to the junction of the roof plywood deck and the roof rafter/truss top chords, the SPF was found to provide a resistance of 153 pounds per square foot (PSF)—roughly equivalent to the wind speed found in a Category 4 hurricane.
“The adhesion strength of CertaSpray can help reduce building damage during tropical storms and hurricanes,” the company said. “According to Applied Research Associates Inc., the roof deck attachment during a hurricane is critical to the survival of the building. Once a building loses one or more pieces of roof deck, the insurance losses increase exponentially due to the vast amount of water that enters the building.”
Lionel Rossignol, product manager, CertainTeed Insulation, said the SPF product’s role in creating an adhesive roofing assembly that is resistant to wind uplift is significant in homes and structures “susceptible to destructive storms.” The use of SPF in the roof assembly also provides “a significant boost to the energy efficiency and comfort of home,” he said.
The SPF product can be applied to the underside of roof decks, walls, cathedral ceilings, and attics to provide a tight thermal and air barrier, contributing to lower heating and cooling costs, the company says.
More information: www.certainteed.com.