Interlock has completed 22 metal roofs in Mount Vernon, WA. Local projects span 5 roof profiles (Shingle, Tile, Slate, Cedar Shake, Cedar Shingle) and were installed between 1999 and 2016.
★★★★★— Tina H., Mount Vernon, WA · 2018 · Verified ↗
★★★★★Local roofing factors: Mount Vernon, WA has a moist, maritime climate with substantial seasonal rainfall and frequent rainy days—conditions that promote roof moisture retention and encourage moss/algae growth on shaded surfaces. Winters are generally mild with very low average sn
— Jim and Shanda M., Mount Vernon, WA · 2016 · Verified ↗
★★★☆☆Local roofing factors — consistent year‑round rainfall (~32 in/yr) increases wet exposure and corrosion risk for roofs. Maritime humidity and frequent cloud cover promote moss/lichen growth on shingles, which affects Metal Shingles maintenance in Mount Vernon, WA. Excerpt (singl
— Angela and Jeff H., Mount Vernon, WA · 2008 · 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 ↗






Join your neighbours with a lifetime Interlock aluminum roof — lightweight, fire-resistant and backed by a lifetime limited warranty.
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