When the San Francisco-area community of Daly City, Calif., was looking to reroof its corporate maintenance facility, it was obvious that ordinary products would not do. City officials requested environmentally responsible roofing, made from a significant share of recycled materials. Just as important, they wanted a roof that would boost the facility’s energy efficiency.
Even without the city’s eco-responsible mandate, site conditions precluded the use of traditional hot-asphalt roofing adhesives. The maintenance facility’s 40-year-old, 3,000-square-foot, flat roof had been leaking for some time, and there was the risk that liquid asphalt could invade the underlying insulation. Furthermore, because of the public nature of the facility, and the existence of a fueling station on the property, only odor-free, nonflammable materials and processes could be used.
“The facility includes offices that would be occupied during the reroof, and there is an on-site fueling station,” explained Jay Mulligan, a California-based representative of The Garland Company Inc., the manufacturer providing the roofing solutions for this project. “Vehicles are continually refueled on the property, so open flames are prohibited, meaning hot kettles could not be used.”
The city chose Garland’s ecologically responsible Green-Lock multi-purpose membrane and flashing adhesives to resolve its roofing concerns. These 100-percent solids, VOC-free, odorless, single-component adhesives provide an exceptional bonding agent for a wide range of materials throughout the building envelope, including modified bitumen roofing.
A local roofing contractor used Green-Lock Membrane Adhesive to secure Garland’s double-belted styrene-butadiene-styrene (SBS) modified bitumen waterproofing membrane. Over that, they layered Garland’s StressPly Plus FR Mineral, a mineral-surfaced, high