King County Westpoint WWTP Digester #3

Project: Westpoint Treatment Plant Digester #3 Roof Rehabilitation
Location: Seattle, Washington
General Contractor: Axiom Division 7
Owner: King County Waste Water
Year Completed: 2015
Square Feet: 10,000 SF
System Type: Soprema Alsan RS 230 Fully Reinforced PMMA Waterproofing System

Project Description: Reroofing project involved a complete coating of existing BUR roof of digester tank. Work included removal and disposal of bottom 8’ of roof, infill with new insulation and new Soprema 2 ply membrane all set in Soprema Colply Adhesive. After pressure washing of remaining system, Axiom installed a fully reinforced, medium trafficable Soprema Alsan RS 230 PMMA waterproofing over entire roof, including 8” down the inside of the tank lid. After installing a 230 Resin/ Fleece/ Resin system, Axiom applied an additional layer of Alsan RS 230 and broadcast Quartz into wet set PMMA to create a granular surface.