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COATINGSPRO ROOF COATINGS 2017 7 selected to extend the life of existing roofs, this requires addressing the wear and tear of roofs that have been exposed to the elements for many years. "Roofing is a bit more sophisticated [than other coating jobs]," Rust-Oleum's Gibbons said. "e coatings themselves are a bit more complex, as well as the system. e steps you need to take throughout the process, you just have to be a little more careful throughout." "If you're focusing on something where weather and waterproofing is very important and you want to coat a roof, compare that to just painting a normal interior wall," Gibbons added. "Can you get away with not using a primer in that instance? Yeah, maybe you can. But when you get into roofing, you want to make sure you do all the patch and repair." Exposure to the elements must also be considered. "In a low-slope environment, if it does get wet, you're going to have problems with recently applied material," explained Jim Arnold, director of product development at Kemper System America, Inc. "Knowing the short-term and long-term weather forecasts is important. You definitely want to be aware of the substrate temperature, too. On a really hot day, when it's 90 °F [32.2 °C], the substrate has the potential to be over 150 °F [65.6 °C] or 160 °F [71.1 °C]. Can we adjust our application times so that the material is not flash curing on contact with the roof surface?" "You can try going to work in the morning, but then you may encounter issues with dew and the dew point, and you want to make sure you're applying your coating to a dry surface," Arnold added. "A lot of that goes into the time of year, too. e spring and fall, when you have your heaviest dews, might not be the best time to apply your coating. So it's a combination of weather factors that can dictate when is best for your application." Safety, Access Concerns Once a contractor understands the challenges of a roof coating/SPF assignment, the first part of a job usually involves developing a logistics plan to access the roof and keep crew members safe in the process. On many projects, this involves getting materials, equipment, and people to a jobsite that is several stories high! For workers themselves and lighter materials, contrac- tors can use elevators, stairways, or tall ladders to access the roof. But moving heavier materials and/or equipment can often be problematic. "One of the factors contractors speak to us about is getting materials up on the roof," said Rooftop's Burns. "at becomes a big deal, especially for a smaller contractor that may not have a crane for moving products up onto a roof." If a crane or specialized lift is not available, equipment Roof Coating Systems Several factors, such as weather, need to be considered when choosing a coating system. "Knowing the short-term and long-term weather forecasts is important," said Jim Arnold, Kemper System America's director of product development. "Roofing is a bit more sophisticated [than other coating jobs]," said Dan Gibbons, Rust-Oleum's brand manager. There are steps on a roof job (e.g., patch and repair) that may not be on another coating job.

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