CoatingsPro Magazine

JUL 2015

CoatingsPro offers an in-depth look at coatings based on case studies, successful business operation, new products, industry news, and the safe and profitable use of coatings and equipment.

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34 JULY 2015 COATINGSPROMAG.COM PHOTOS COURTESY ARKEMA INC., BRAZOS URETHANE, INC., AND QUEST CONSTRUCTION PRODUCTS LLC BY JACK INNIS, CONTRIBUTING EDITOR Clip In and Hang On! Superdome Roof Job he Mercedes-Benz Superdome (née Louisiana Superdome) was bui lt in 1975 as a venue for spor ts events, conventions, and other large-sca le attractions. It is home of the Nationa l Footba l l Leag ue's New Orleans Saints and has hosted seven Super Bowls. For New Orleans residents, the 273-foot-high (83.2 m) Superdome is more than just a venue. Te structure's 680-foot-diameter (207.3 m) dome is New Orleans' crown jewel. It symbolizes the successful revitalization of the city's central business district. Designed to withstand hurricane force winds, which occur all too often in New Orleans, the Superdome stands for strength and resiliency. In 2005, Hurricane Katrina tested that strength and resil- iency. W hile the main structure withstood the storm's 125 mph (201.2 km/h) winds, the dome lost approximately 20 percent of its ethylene propylene diene terpolymer (EPDM) rubber roof. As soon as the rubble cleared, Texas City, Texas-based Brazos Urethane installed a new spray polyurethane foam (SPF) roof and topped it with a 45-mil (1,143 microns) approximate dry flm thickness (DFT) polyurethane coating system. But in 2014, less than 10 years later, Superdome opera- tors hatched plans to install a new fuid-applied coating over the old coating system. Tis begs the question: Did something go wrong? Clip In and Hang On! Brazos' project manager Tom Keller clipped his safety harness lanyard to a rope grab, hung on, and lowered himself down the Superdome roof. Feeling a bit like a mountaineer, Keller rappelled up and down, traversing the dome until he inspected the entire 450,000-square-foot (41,806.4 m²) coating system. Te 10-year-old roof looked great for the most part. So why was his crew about to recoat a perfectly good roof? "Te roof was in excellent condition and has been that way since we put it on in 2006," said Keller. "Te polyurethane coating still had a lot of life left in it, but installing a new system actually made sense." Here's why! Wit h t he e x ist ing 10 -yea r wa r ra nt y about to e x pire, Superdome operators had t heir eyes on a 20 -yea r ROOF SPF

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