It has been known for many years that an SPF roofing system can enhance the wind uplift resistance of a roof covering. Field observations of SPF performance after Hurricanes Hugo and Andrew led to the Spray Polyurethane Foam Alliance (SPFA) sponsoring wind uplift testing of SPF roofing systems by Underwriters Laboratories (UL) and Factory Mutual Global (FM Global). According to UL, SPF’s resistance exceeded the capacity of the equipment to measure wind uplift pressures.
As you may be aware, beginning January 1, 2010, the California Energy Commission adopted an update to California’s Building Energy Efficiency Standard, Title 24, which has significant new implications on the type of commercial building roofs. These updates are especially important for Southern California’s commercial buildings’ roofs, most which are typically 25 years old, an age when leaks and other maintenance issues begin occurring, and require attention. According to the Department of Energy (DOE), three-quarters of the roofing installed each year is reroofing on older buildings. Additionally, commercial and industrial buildings in California account for over half of the total electricity use in the state. 1 These statistics provide excellent reasons for installing more environmentally responsible and longer lasting products rather than simply replacing a failed roof with more of the same.