Interlock has completed 2 metal roofs in Friday Harbor, WA. Local projects span 2 roof profiles (Standing Seam, Shingle) and were installed between 1999 and 2001.
★★★★★Coastal moisture/high humidity (promotes moss/algae growth and increases corrosion risk for roofing materials). Moderate but frequent rainfall (~25 in/year) with minimal snow—roofs see regular wetting but limited freeze–thaw stress. Excellent experience and top-quality Metal Shi
— Bob and Susan J., Friday Harbor, WA · Verified ↗
★★★★★Interlock Metal Roofing (PNW) Inc. — Seattle, WA: Two sales reps answered every question, showed deep knowledge of Metal Shingles and roofing in general, and did an excellent job; they also addressed Seattle’s wet, moss-prone conditions—frequent rain and coastal moisture that inc
— Lance T., Seattle, WA · 2026 · Verified ↗
★★★★★— Mustaqim M. and Misba M., Redmond, WA · 2026 · Verified ↗
★★★★★— Darris and Joleen B., Rainier, WA · 2026 · Verified ↗






Join your neighbours with a lifetime Interlock aluminum roof — lightweight, fire-resistant and backed by a lifetime limited warranty.
Call 1-866-780-8247 for a free quote