In the Pacific Northwest, rain is abundant and unpredictable. Having a reliable weather-tight roof is a must worth its weight in gold. Over the past two decades, GSM has been called on by Western Washington’s best General Contractors to install countless metal roofing systems all over the Greater Puget Sound area. And whether installing basic corrugated metal roofing over a trash enclosure, or intricate standing seam roofing on a custom waterfront home, General Sheet Metal has you covered. With a full range of local vendors and suppliers, you can count on GSM to be your one stop shop for all your custom metal roofing components. We are certified and recommended AEP-Span / ASC profile fabricators & installers. From our estimating & design team, to our fabricators & installers, GSM utilizes modern technology, tools and fabrication methods that meet or exceed SMACNA requirements, giving you a metal roof system that is rich in durability, utility & visual appearance. And unlike distributors that only carry generic light gauge shelf-stocked flashings, GSM specializes in producing custom fabricated flashings made from architectural grade steel, which aid in each roofing systems specific aesthetic and utility requirements.