Seattle, WAHead office
5608 17th Ave NW, Suite 1574Seattle, WA 98107-5232
Counties served
Washington · Offices
Our Washington Offices
Interlock Metal Roofing (PNW) Inc. installs metal roofing across Washington from three offices — Seattle, Bellingham and Stanwood — as Washington's authorized installer of the Interlock® Lifetime Roofing System under contractor licence #INTERMR75406. Between them the offices cover King, Pierce, Kitsap, Whatcom, Skagit, Snohomish and Island counties, with the phone answered weekdays from 9:00 AM to 5:00 PM Pacific.
Technically reviewed by Scott Plumptree, Director of Marketing · Updated 2026-08-17
3,223 completed Washington installations since 1997Washington licence #INTERMR75406
Monday–Friday, 9:00 AM – 5:00 PM Pacific · Saturday and Sunday, closed
Where we work from
Each office has its own address, its own direct line, and its own corner of the state.
Seattle, WA 98107-5232
Bellingham, WA
2219 Rimland Dr, Suite 301Bellingham, WA 98226-8660
Counties served
Stanwood, WA
26910 92nd Ave NW, Suite 425Stanwood, WA 98292
Counties served
Why three offices, and what it changes for you
Washington is wide, and a roof is not a job you do from a phone. Someone has to stand on it, measure it, and come back when the panels land. Working from Seattle, Bellingham and Stanwood means the crew that quotes your roof is starting the day nearer to it: a Whatcom County estimate is a local drive from Bellingham rather than a run up I-5 from Seattle, and Camano and Whidbey are a short hop from Stanwood instead of a ferry plan.
Crews who know their own corner of the state
The three offices also split the state along the lines the weather already draws. Around Puget Sound the problem is volume — a wet season from October to June, and the moss it feeds on asphalt and cedar. On the Salish Sea and the Strait the problem is chemistry: salt air attacks steel at every cut edge, scratch and fastener hole, and aluminum has no iron in it to oxidize. In the Cascade foothills it is snow load. A crew that works one of those conditions week in and week out reads a roof faster than one that sees it twice a year.
One company, one warranty, one licence
All three offices are Interlock Metal Roofing (PNW) Inc., working under Washington contractor licence #INTERMR75406 and installing the same system: four-way interlocking aluminum panels with concealed fasteners, a warranted 120 mph wind rating, UL 2218 Class 4 impact resistance, and wind uplift documented to 177.5 psf under ICC-ES ESR-1790. The Guardian lifetime limited warranty covers the original owner for as long as they own the home and transfers once — the second owner is covered to 50 years from substantial completion. Product engineering belongs to the manufacturer, Interlock Roofing Ltd.; Washington installation, service and proof belong to us.
Counties covered from these offices
King, Pierce, Kitsap, Whatcom, Skagit, Snohomish and Island counties are dispatched from Seattle, Bellingham and Stanwood. We install across the rest of Washington as well — the full list is on the Washington service areas page.
Talk to the office nearest you
A 30–90 minute visit — including an attic ventilation check and a look at moss, drainage and flashing history — and a written number to decide with. Call the office that covers your county, or send one request and we will route it.
Interlock Metal Roofing (PNW) Inc. · Washington contractor licence #INTERMR75406, verifiable with the Washington State Department of Labor & Industries.
