Spray Foam Roofing Systems

Tech Bulletins

I NSPECTION , E VALUATION , AND R EPAIR OF SPF R OOFING S YSTEMS AFTER A W INDSTORM OR H AIL E VENT

SPF roofing systems have exceptional sus tainability characteristics. They save energy, are resistant to high winds, protect the sub strate against damage from hail and wind driven missiles, and are renewable. However, when a SPF roof sustains damage from wind driven missiles or hail, how does one deter mine what procedures are required to maintain the roof’s longterm performance? Under which conditions can the roof be renewed? When must it be scarified, recoated, or torn off? This presentation will discuss the type of damage likely to occur during wind storms and hail events, the effect on the SPF roofing system’s performance, and common sense guidelines for inspecting, evaluating, and recommending repairs.

Spray Polyurethane Foam(ccSPF) to Enhance the Structural Properties of Wall and Roof Assemblies

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 roof¬ ing 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.

Low Slope Roofs and Sustainability

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.