CoatingsPro Magazine

JUL 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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intumescent coating within hours of application. DC 315 is a high-per for mance intumescent coating specia lly designed for application over SPF. It prov ides a fire protective barr ier to delay the involvement of the foam in a fire. T he mater ia l is tested to the cr iter ia of the National Fire Protection Agenc y (NFPA) 286, UL 1715, or C A N/Under w r iters' Laborator ies of Canada (ULC) 9705 for duration of 15‒20 minutes by an accredited fire testing facil- it y. DC 315 has also been tested as an ignition barr ier under Acceptance Cr iter ia (AC) 377 Appendi x X . DC 315 is fully AC456 compliant and satisfies the Inter nationa l Building Code (IBC), Inter nationa l Residentia l Code (IRC), Nationa l Building Code of Canada (NBCC), and many other inter na- tiona l model building codes. e Wedge team applied the DC 315 at a dry film thickness of 15‒16 mils (381.0‒406.4 microns) using Graco Magnum Pro X9 and a Graco 3G3 spray gun. e application of the DC 315 went off without a hitch, allowing for a full 96-hour "cure-out" prior to the application of the finish coat. "Because of the requirement for incidental food contact and its subsequent required cleaning, plus the possibility of a high humidity/surface condensation, we decided to install a white, high-solids silicone coating over the DC 315," said Harvey. e GE Enduris 3500 silicone was applied at an average of 14 dry mils (355.6 microns) using Graco's 933 7,250 psi (49.98 MPa) pumps and Graco XTR-7 high pressure guns. is durable coating provides protection from the surface condensation that occurs when the cold storage facility doors are opened and closed throughout each day; it also maintains the fire protection performance of the intumescent coating. "e NFPA 286 testing demonstrated that the silicone coating did not comprise the thermal barrier," said Harvey. A Toast to Success With the application of the finish coat, the Wedge Roofing team de-masked the building, removed the containment materials, and returned the facility to the owner before the beginning of the harvest. A ll in all, the job took 12 days from start to finish, including cure periods. A lthough Harvey is the first to admit that the finished project is not 100 percent perfect aesthetically, it is light years ahead of the original SPF application. "We rescued this botched install by thinking outside of the box. We wanted to save the client time and money by not removing the existing SPF system, as well as provide a highly functional and aesthetically pleasing final product. By consulting industry experts and conducting chemical analyses on the existing system, we were able to do just that," he said. anks to a comprehensive strategy on the part of the experienced Wedge Roofing application team, the Realm Cellars main cold storage facility was up and running right in time for the harvest season, and the company won first place in CoatingsPro's 2018 Contractor Awards Program for Specialty Project category to boot. Cheers to a job well done! CP COATINGSPRO JULY 2018 29 JOB AT A GLANCE PROJECT: Apply a new spray polyurethane foam (SPF) and intumescent coating system to a cold storage facility at a Napa winery COATINGS CONTRACTOR: Wedge Roofing 5 Casa Grande Rd. Petaluma, CA 94954 (707) 763-5475 www.wedgeroofing.com SIZE OF CONTRACTOR: 45 employees SIZE OF CREW: 9 crew members PRIME CLIENT: Realm Cellars 5795 Silverado Trail Napa, CA 94558 (707) 224-1910 www.realmcellars.com SUBSTRATE: Existing SPF layer on wood framing CONDITION OF SUBSTRATE: Poor; irregular and inconsistent foam thickness SIZE OF JOB: 7,000 sq. ft. (650.3 m²) DURATION: 12 days UNUSUAL FACTORS/CHALLENGES: » Due to the extremely tight time frame, the cure times had to be carefully and precisely calculated. » The crew had to work safely around the occupied office space. MATERIALS/PROCESSES: » Conducted tests to determine if the existing SPF system could accept the new system » Corrected areas of extreme surface deficiencies using orbital grinders, pneumatic shaving tools, and Sawzalls » Spray applied Sherwin-Williams Extreme Bond primer at a dry film thick- ness (DFT) of ~1 mil (25.4 microns) using a Graco Magnum Pro X9 and a Graco 3G3 spray gun » Spray applied Everest Systems' 2-lb (907.2 g) density, Evercell 2.0 SPF using a Graco E-30 reactor-based spray rig and Graco Fusion AP guns » Spray applied Sherwin-Williams DTM primer at 2.5–4 mils (63.5–101.6 microns) DFT using a Graco Magnum Pro X9 and a Graco 3G3 spray gun » Spray applied International Fireproof Technologies' DC 315 at 15–16 mils (381.0–406.4 microns) DFT using a Graco Magnum Pro X9 and a Graco 3G3 spray gun » Spray applied GE Enduris 3500 at 14 mils (355.6 microns) DFT using Graco's 933 7250 psi (49.98 MPa) pumps and Graco XTR-7 high pressure guns SAFETY CONSIDERATIONS: » Wore gloves, Tyvek suits, and 3M respirators at all times; wore supplied air during SPF application

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