CoatingsPro Magazine

MAY 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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Page 65 of 92

COATINGSPRO MAY 2018 65 Strong Bond To get to the point of the final coating systems, the crew had to prep all 179,181 square feet (16,646.5 m²) of surfaces. e exterior required little prep, but the concrete, for instance, needed to be ground first to flatten the surface. ey used diamond cup grinders from DeWalt to accomplish that task. And then they finished the installation of the EIFS, including the Backstop NT air/weather barrier, which was applied at 500‒600 square feet (46.5‒55.7 m²) per 5-gallon (18.9 L) pail. On top of the Backstop, the crew used a layer of Genesis DM to adhere the EPS to the buildings' exteriors. ey troweled on another layer of Genesis DM basecoat to the face of the EPS, but this time the layer was embedded with mesh. Once they were ready to move onto the toppings, the crew worked first to blow any debris off of the scaffolding. "e working platform must be dust free, no debris or anything," Laragan said. "ey have to clean the scaffold of all the dust so it won't go on the wall." e crew used a leaf blower from the top of the scaffold to the bottom before coating. "Every move you do, you have to keep the scaffold clean," he continued. Over the course of the year, Group Builders encountered challenges with all t ypes of weather, including wind, rain, and even sunshine. To avoid issues from the sun, they moved to shady spots and used shading. The system started with an air/weather barrier, expanded polystyrene (EPS), and Genesis DM with mesh. The crew also applied a primer called Color Prime for all three layers. Materials all came from Dryvit. JOB AT A GLANCE PROJECT: Apply the exterior architectural coatings to two six-story mixed-use build- ings in Hawaii COATINGS CONTRACTOR: Group Builders, Inc. 511 Mokauea St. Honolulu, HI 96819 (808) 832-0888 SIZE OF CONTRACTOR: 500 people SIZE OF CREW: 7-74+, depending on the task PRIME CLIENT: Keauhou Lane 502 Keawe St. Honolulu, HI 96813 (808) 542-6956 SUBSTRATE: Concrete and sheathing CONDITION OF SUBSTRATE: New SIZE OF JOB: 179,181 sq. ft. (16,646.5 m²) total DURATION: ~1 year UNUSUAL FACTORS/CHALLENGES: » This was the first time that the Reflectit product was used in the area, so application training was held. » Wind, rain, and sunshine caused separate concerns during coating appli- cation. » The crew had to coordinate with the general contractor, who released different parts of the building at various times. MATERIALS/PROCESSES: » Flattened concrete with diamond cup grinders » Applied Dryvit's Exterior Insulation and Finish System, starting with Backstop NT air/weather barrier, which was applied at 500-600 square feet (46.5-55.7 m²) per 5-gallon (18.9 L) pail » Attached expanded polystyrene (EPS) continuous insulation with Genesis DM » Troweled Genesis DM on top of the EPS, embedded with mesh » Troweled on SkimIt at 350 square feet (32.5 m²) per 60-lb. (27 kg) pail to any areas where the Reflectit would go » Rolled on Color Prime at 1,500 square feet (139.4 m²) per 50-lb. (23 kg) pail for all three finish layers » Spray applied Reflectit with a Binks 2001 spray gun to an average of 900 square feet (83.6 m²) per 42-lb. (19.1 kg) pail » Troweled TerraNeo to an average of 1 / 16 - 1 / 8 th inch (0.2-0.3 cm) thick » Troweled Sandpebble to an average of 1 / 16 th inch (0.2 cm) thick SAFETY CONSIDERATIONS: » Worked on scaffolding, which didn't require harnesses » Wore face shields when grinding the concrete » Wore hard hats, safety glasses, high-visibility clothing, and Red Wing steel-toed boots

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