CoatingsPro Magazine

MAR 2018

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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Throughout the seven weeks that they were on the project, the crew wore personal protective equipment (PPE), such as gloves, face masks, coveralls, long sleeved shirts, eyewear, knee pads, and hats, as necessary. COATINGSPRO MARCH 2018 37 Overload Problem Since a horseshoe-shaped parking lot surrounded the building, jobsite access was simply a matter of shifting resident parking from one side to the other while the crew worked, one roof at a time, on the complex's six buildings. Nobody wants to give up their pet parking space, but tell that to owners on the top floor dealing with leaks! Rather than have the men wear safety harnesses, Duarte installed a safety barrier 5 feet (1.5 m) from the roof 's edge. "In a case like this with no parapet walls, the yellow warning flags let workers know where the edge of the roofing was," said Duarte. "e trade-off was that we had to have a safety monitor up there whenever workers went outside of the barrier. His only job was to watch the workers, and he was the most important person on the jobsite when men were outside the flags. He had authority over ever yone on the roof, including the supervisor, including me." W hile part of the crew scraped and shoveled gravel, others, using a moisture-sur vey map produced by Roof Surveys, Inc., cut out rotten ply wood, mostly around the perimeter. ey also pried up the perimeter gravel-stop edge metal. A subtle vertical on the lip of this style of edge metal helps keep gravel on the roof, but it promotes wood rot over time by encourag - ing puddling near the perimeter. Henr y's silicone roof system doesn't need gravel to combat deterioration caused by sunlight, thus no vertical lip to trap water. In the meantime, the spud-and-shovel team hit a snag. e debris chute that funneled gravel into a dump truck waiting below couldn't handle the weight of the gravel at the angle needed. Duarte had to find a quick fix, so he sent a runner to Home Depot to grab a pickup truck full of lumber. In no time flat, the FQR crew fashioned a ply wood slide, which solved the chute overload problem and put this project back on track. Rotten roof ply wood was replaced by fresh ⅝-inch (1.6 cm) sheets, and it was brought level with layers of nailed and self-adhered fiberglass reinforced mats coated with a modified bitumen compound. e crew installed new 90-degree perim - eter edge metal, and the crew then used 3-inch-round (7.6 cm) washers and screws to cover the entire roof with 4- by 8-foot (1.2 m x 2.4 m) Securock panels. e pre-primed (Securock comes unprimed, too), ½-inch (1.3 cm) gypsum-fiber board creates a solid, smooth surface upon which rolls of self-adher - ing modified bitumen membrane could be laid out. Pity the underachieving roofing crew that forgoes cover board on a project like this! "Securock conforms to the bumpy substrate," says Duarte. "It cushions, levels, and makes things nice and smooth. If a roofer tried to install bitumen membrane directly over a scraped gravel roof, it simply wouldn't work. It wouldn't pass code, it would leak like the dickens, and it would be the most unprofessional job ever!" Waterproofing in Florida

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