Alternative Roofing Systems, Inc. is the number one installer of Duro-Last roofing in Washington. We have done large-scale installations in the Northwest for many companies you know and on buildings you've likely driven by. Alternative Roofing Systems is based in Snohomish, WA. This location has proven to be a superb point of dispatch to service and install roofing in Seattle, Bellevue, Kent, Tacoma and other areas throughout the Puget Sound.