CoatingsPro Magazine

JAN 2019

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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COATINGSPRO JANUARY 2019 57 after they replaced the insulation board. In addition to removing the saturated insulation board, the Spray-Tec crew also cut back the perimeter edge on the roof to relieve membrane shrinkage. "e original edge detail on the roof was poorly designed and caused water collection and drain- age issues. We removed the old edge detail and installed new edge metal detail," said Heisler. Once the edge details were removed and the old polyurea and EPDM were peeled back, the crew got rid of all wet and leaking fiber board. "We took shovels to the wood fiber board because in most places, it was so saturated that the material was like saw dust. We used pick axes to remove any screws and fasteners," said Heisler. He credits Luke Berge, the foreman in charge of tear off, for quick and efficient work that kept the job on schedule. "Luke and Gustavo Garcia, the foreman in charge of repairing and spraying the silicone coatings, did a fantastic job of keeping the job moving, regardless of the challenges we faced," stated Heisler. e tear off and repair portion of the job took three weeks, while the priming and coating of the roof surface took approx- imately one week. ere were two four- to six-person crews working on the job, and both crews worked weekends to ensure that the job was finished before the big race. "It was really fortu- nate for us that we were able to get to the jobsite very early in the morning. e track maintenance team was already there so they were able to turn on the lights for us before the sun was up. is also helped keep us on schedule," said Heisler. Repairing the Roof With the old, failing materials removed, the crew used a Hotsy machine to power wash the roof area, and then they began the task of replacing the perimeter edge details and the insulation board. It was then time to pull the rubber and polyurea back over the roof area. According to Heisler, these materials were fastened down with metal termination bars that keep a good, firm hold to ensure a tight seal. e team also resealed the new edge detail using Karnak butyl tape and Dow Corning silicone caulk. Work on the perimeter edge included cutting back and installing a new edge metal. Edges were resealed with butyl tape, silicone caulk, and silicone sealant. JOB AT A GLANCE PROJECT: Rehabilitate and restore the roof of the Kentucky Speedway where the camera crews are stationed COATINGS CONTRACTOR: Spray-Tec Inc. 1132 Equity St. Shelbyville, KY 40065 (502) 633-5499 SIZE OF CONTRACTOR: 25–30 employees SIZE OF CREW: Two crews of 4–6 crew members PRIME CLIENT: Kentucky Speedway 1 Speedway Dr. Sparta, KY 41086 (859) 578-2300 SUBSTRATE: Wood fiber board CONDITION OF SUBSTRATE: Saturated and leaking SIZE OF JOB: 30,000 sq. ft. (2,787.1 m²) DURATION: 25 days UNUSUAL FACTORS/CHALLENGES: » The crew had to finish the project before the Quaker State 400 race. » Heat, high winds, and rain challenged the crew. » The roof needed to have zero reflectivity due to aerial coverage. MATERIALS/PROCESSES: » Performed an infrared scan to identify saturation areas » Cut EPDM and polyurea; removed and replaced insulation board » Cut back perimeter edge to relieve membrane shrinkage and installed new edge metal detail » Power washed roof with Hotsy machines » Resealed edge details using Karnak butyl tape, Dow Corning silicone caulk, and GacoFlex SF2022 silicone sealant » Applied silicone caulk and GacoFlex SF2022 silicone sealant to repaired areas, rooftop units, drains, and penetrations » Applied Gaco Western E5320 primer to roof to varying thicknesses » Applied two coats of GacoFlex S2029 at ~25 wet mils (635.0 microns) each with a Hennes/Johnson airless hybrid pump; broadcast granules SAFETY CONSIDERATIONS: » Used fall protection, including warning lines and lanyards » Wore face shields for debris, sombreros for sun protection, safety glasses, and gloves » Wore 3M respirators during spray applications » Took shade breaks and drank water with electrolyte supplements to stay hydrated in the extreme heat

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