b'Adopting Induction Welding more even wind load distribution "One of the major trends that we have seen over reduced flutter, regardless of sheet width the past few years is the adoption of induction faster dry-in welding as afor attaching thermoplastic methodControlling Labor Costs roofing membranes,"Everett, director said SamAnother trend is toward the use of retrofit roof of marketing, OMG Roofing Products. "Indrains, Ev said."Prior to the 1980s roofing 2011, approximately 100 million square feeterett of thermoplastic single-ply was installed usingcame contractors had two choices when itto the RhionBond System,doubling thehandling drains: They re-worked them or hired a essentiallyplumber to replace the drain altogether. Over the amount installed during the previous year. In fact, for the past 4 years,last 30 years and especially in recent years, the use induction welding as afor installing membrane has grown at a methodof retrofit roof drains have increased to aof rivaling re-working healthy pace."point This is being driven by many factors, Everett said. First, mostdrains." Everett notes thatworking with many roofing contractors, OMG roofing system manufacturers have adopted RhinoBond inductionin technology or are currently testing it. Besides achieving avariety oftakes has noticed large discrepancies in the time that itto re-work widedrains. "Reworking frequently involves repairing and re-tapping bolts factory-mutual approvals, many system manufacturers are promotingand can take more than 3for each drain," he explained. "When RhinoBond technology to their contractor base.hours "Moreover, as contractors have adopted the RhinoBond System,compared with installing an insert drain in 15 to 30 minutes, it is often many have seen rooftop productivity gains, and roof performancenot worth the labor to rework. "Most important, many contractors have realized that theybetbenefits associated with spreading the wind load across the entire deckcan ter control their labor costs by using insert drains,e versus traditional in-seam fastening," Everett said. "Beyond roof mem simply becaus they brane producers and contractors, roofing specifiers and some owners arenot eliminate the guess work ofreally knowing how much time will be beginning to understand the myriad of benefits that thistypeof systemrequired to rework the drains." Everett further noted thatof today\'sdrains have offers, includingsomeinsertno seam fasteners or penetrations ofmechanical seals that roofers trust and that meet current ASNI/SPRI the membraneRD-1 standards.Assuch, these products are less likely to fail ortheenhanceduplift resistanceflood windbuilding in case of a backup. Clllla NE&l\'lOKB 539,541 6:40 FRS-A BOOTH Midwest Roofer- www.mrca.org17'