CASE STUDY
Polyurea & Urethane Coating System
Over Structural Concrete Deck Case Study
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Northwestern University in Natchitoches, LA was looking for a durable deck coating system that could withstand hundreds of students walking across the system daily, plus it needed to be flexible enough to waterproof sections of the deck that were causing leaks in the adjacent Student Union. Steve Loga with Roofing Solutions in Prairieville, LA worked closely with the engineering firm to design the best system for the project. The 23,000 sq. ft. walk path and deck had over 15 years of service life and was well past its prime. Steve manages Roofing Solutions’ coating division and worked closely with their owner, Tupcac De La Cruz, in order to design the best approach to getting the job completed within 30 days, a contract requirement. Roofing Solutions’ Commercial Roofing Division handled the tear-off of the gravel surface to bring the substrate to a point suitable for coating. After tearing off the first layer they found several areas where a 24 hour curing structural concrete was needed to repair the existing deck. The American WeatherStar deck coating system includes a polyurea base coat manufactured by Versa Flex, Inc. based in Kansas City, KS, plus a base and top coat of a single component deck coating manufactured by Neogard of Dallas, TX. After the complete tear-off and repairs of the existing system, aggressive power-washing and shot blasting was done to make sure the surface was clean. A water-block was then used in several areas to ensure ground moisture would not affect the new coating system. After caulking joints with Versa Flex Polyurea Joint Filler, 80 mils of polyurea were applied to all seams, cracks, and transition areas. To complete the polyurea application, 50 mils of the two component coating were applied to the entire surface with a sand aggregate, broadcast over the polyurea within seconds before the coating dried. Within 12-24 hours, a base coat of the Neogard Urethane Coating was applied over the polyurea with another layer of aggregate broadcast into the wet urethane. To complete the project, a top coat of the polyurethane was sprayed over the entire deck. In all, the deck has approximately 80-90 dry mils of combined polyurea and single component polyurethane that gives Northwestern University a uniform, seamless, water-tight deck coating system. The complete Deck Coating Photo Gallery is located here. For more information, see the application specifications on this system or call American WeatherStar at 800-771-6643. |
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