CoatingsPro Magazine

SEP 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 64 of 83

COATINGSPRO SEPTEMBER 2018 65 A Matter of Time As w ith any job, time was of the essence for the West Roofing team. It had taken months to finalize the roofing solution once a total roof replacement was deemed too costly, and the West Roofing crew was working against the clock, especially on the North Colonnade Office Tower. " We had approximately 35 working days in the w inter months to complete the North Colonnade Tower roof. New w indows were to be installed after that time, and the last thing we wanted to be doing was pressure washing the roof w ith the new w indows in the build- ing," said Moore. e water from the pressure-washing process was not only dirty from years of exposure to the elements, but it was also tinted red from the red chalking finish on the existing roof panels. Fortunately for the West Roofing crew, since the buildings were going through major renovations, a contain- ment system was already established. "e water from the pressure-washing process went into an existing overflow/ containment pond. is saved us a great deal of time, as we didn't have to construct the containment ourselves," said Moore. He is also quick to point out that while 35 working days may seem like a long time to complete this job, when you factor JOB AT A GLANCE PROJECT: Restore two landmark roofs of the Colonnade Office Towers with a red waterproofing system COATINGS CONTRACTOR: West Roofing Systems 4700 Commercial Dr. Huntsville, AL 35816 (800) 356-5748 SIZE OF CONTRACTOR: 100 employees between three locations SIZE OF CREW: 10 crew members PRIME CLIENT: Southern Company 30 Ivan Allen Jr. Blvd. NW Atlanta, GA 30308 (404) 506-5000 SUBSTRATE: 20-gauge metal roof panel CONDITION OF SUBSTRATE: Structurally sound, but with surface rust and failed washers SIZE OF JOB: 160,000 sq. ft. (14,864.5 m²) total DURATION: 35 days UNUSUAL FACTORS/CHALLENGES: » The extreme slope of the roofs required intricate fall protection system as well as a well-thought-out application strategy. » The crew dealt with time constraints to complete the washing and coating of the roof prior to the new window installation. MATERIALS/PROCESSES: » Power washed all roof surfaces » Replaced the missing fasteners with oversized fasteners » Treated all end-lap seams, fasteners, and transition details with ~40 mils (1,016.0 microns) of custom blended silicone sealant » Installed ~10-mil (254.0 microns) basecoat of Accella Poly-Sil 2200 Solvent Based Silicone Coating » Applied a topcoat of ~20 mils (508.0 microns) of Poly-Sil 2500 High Solids silicone coating in a custom terra cotta color SAFETY CONSIDERATIONS: » Used permanent anchor points engineered and installed around the base of the roofs at 10 feet (3.1 m) on-center » Used Granite Industries Coping Type Guardrail Systems, installed at 8 feet (2.4 m) on-center » Wore 3M's DBI Sala and Miller Tower harnesses » Wore rock climbing helmets and soft-sole mountain climbing boots, as well as magnetized boots when conditions were slippery » Wore Tyvek pants and shirts and 3M half-masks with cartridge respira- tors when coating To prep the 160,000-sq.-ft. (14,864.5 m²) job, they started by power washing the 20-guage metal roof panels. Missing fasteners were replaced, and seams, fasteners, and details were treated with a silicone sealant. The crew spray applied both the basecoat — Accella Poly-Sil 2200 Solvent Based Silicone Coating — and the topcoat — Poly-Sil 2500 High Solids silicone coating. That topcoat was in the custom terra cotta color.

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