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20 ROOF COATINGS 2017 COATINGSPROMAG.COM Roof Coating Systems continued from page 18 and synthetic component, slate, and wood shake and wood shingle roof systems. Updated each year, the manual offers comprehensive information on roofing system design, materi- als, and installation. A lso within the past year, RCMA and standards organi- zation NSF International created the first product category rule (PCR) in North America for roof coating materials. ese PCRs, which define how to conduct a life-cycle assessment, were designed to enable a product's environmental informa- tion to be more transparent to the marketplace. Products covered in the roof coatings PCR include fluid-applied and adhered coatings used for roof maintenance or roof repair, or as a component of a roof covering system or roof assembly. "is rule provides our industry a much needed guideline for calculating and reporting the environmental attributes of roof coatings," the RCMA's former executive director said. "e subsequent life-cycle analysis developed by our members using the PCR can provide a basis for improvement to enable reductions in environmental impacts over time." e PCRs were developed from a panel of RCMA members, suppliers, regulatory agencies, environmental agencies, and end users. NSF International also offers valuable certifications, including NSF Protocol P151. is certification is based on the group's Rainwater Catchment System Components program, which establishes quality guidelines for products, such as roof coatings, that come in contact with rainwater poten- tially used for drinking. ese catchment systems, which collect rainwater for use as potable water, are commonly found in tropical areas. National Coatings' SRC 720 and Gaco Western's GacoFlex S20 Solvent-Free 100% Silicone are two examples of silicone roof coatings to have earned the NSF P151 certification within the past year. Meanwhile, standards group ASTM International issued a number of updated standards in 2017 related to roofing membrane systems, including ASTM D5636: Standard Test Method for Low Temperature Unrolling of Felt or Sheet Roofing and Waterproofing Materials, ASTM D5683: Standard Test Method for Flexibility of Roofing and Waterproofing Materials and Membranes, ASTM D6382: Standard Practice for Dynamic Mechanical Analysis and Thermogravimetr y of Roofing and Waterproofing Membrane Material, and ASTM D7120: Standard Guide for Evaluation and Preparation of Roof Membranes for Coating Application. Other 2017 updates of note include ASTM D1864 and ASTM D1865, which address test methods for moisture and hardness, respectively, in mineral aggregate used on built-up roofs. In general, a safety-first approach may include consid- eration for hatches, access, and skylights, and the use of anti-slip components and yellow safety warning walkways. Outlook and Conclusions e application of new roof coatings and SPF can be a more economical, sustainable, and efficient alternative to a full roof replacement project. As such, momentum for the sector should only continue to grow. "At one time, the coatings business may have been sending one contractor with one product to coat a roof and extend the service life of that roof for a small period of time," said Kemper System's Arnold. "But it has now evolved to installing systems of products that can function with equal performance as a complete reroof, but you get the benefit of applying a coating instead of reroofing. Reusing your exist- ing roof as a substrate makes for a more sustainable project. It doesn't create landfill, and there's also not a lot of disrup- tion at the owner's facility. It happens faster, too. Typically, a faster product application process is at least five times faster than reroofing." To capitalize on those market opportunities, new technologies and products are consistently being rolled out to address some of the unique roofing challenges. Contractors who are aware of their many options while also utilizing best safety and application practices should be in prime position in the years ahead to reap the rewards of this burgeoning industry. CP Roof Coating Systems New technologies are constantly being added to the roof coating industry, offering great potential for a new coating system to be more economical, sustainable, and efficient than a reroof.

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