Tacoma Roofing and Waterproofing was chosen as the trusted commercial roofing contractor for the Shelton Apartments in Seattle. For this multifamily building, our expert technicians installed a 80 mil TPO single ply membrane roofing system. This new flat roofing system has a 20 year NDL (No Dollar Limit) warranty. An NDL warranty means that for 20 years this roofing system is guaranteed by the manufacturer and if anything goes wrong the manufacturer will cover all material, labor, and any other costs for repairs on the entire roof. In addition to the membrane roof our technicians installed R-38 rigid insulation, ¼” DenDeck and mechanically attached the TPO to provide the best security for the building.