Metal Roofing Built for Sequim's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection

Performance you can measure (all climates):
• Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
• Aluminum panels are coated with the Alunar® Coating System (no visible aluminum surface) for durable color and corrosion resistance
• Tested to 120+ mph for severe coastal windstorms common to Sequim and surrounding Clallam County shorelines
• Built to resist prolonged, driving rain from atmospheric rivers that affect Sequim and the Olympic Peninsula
• Corrosion-resistant aluminum formulated for constant marine exposure and salt air along Sequim Bay and the Strait of Juan de Fuca
• Profile geometry and the Alunar® finish limit moss and organic growth in Sequim’s damp, shaded microclimates, simplifying maintenance
• Snow-shedding metal panels reduce buildup and help prevent ice dams during occasional freeze–thaw cycles and Sequim snow events
• Class A fire-rated available for added protection during regional dry spells and ember exposure concerns
• UL 2218 Class 4 impact resistance helps protect roofs from hail, falling branches, and storm debris in coastal windstorms
• Reflective, energy-efficient surface reduces summer heat gain and improves attic comfort during warm spells
• Engineered to accept bracket-mounted photovoltaic arrays for straightforward solar installs on Sequim homes
• Fully recyclable aluminum supports sustainable choices for homeowners across Sequim and Clallam County
• Low-maintenance design resists corrosion, staining, and biological growth common to coastal Washington, extending service life versus asphalt shingles
• Backed by a Lifetime-Limited transferable warranty to protect resale value and provide long-term performance assurance
Interlock Metal Roofing (PNW) Inc.
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Interlock® Aluminum Roofing — all-climates performance specs for Sequim, Washington
| Spec / Rating | Climate / Risk Factor + What It Solves |
|---|---|
| Wind resistance: 120+ mph (193+ kph) | Extreme wind, hurricanes, storm uplift: full interlocking attachment helps prevent blow-offs, edge lifting, and panel loss in high-gust events. |
| Fire rating: Class A (with proper assembly) | Wildfire, embers, radiant heat, chimney sparks: non-combustible roof assembly provides the highest residential fire protection rating. |
| Hail resistance: UL 2218 Class 4 | Hail and impact debris: highest impact classification; resists cracking, splitting, and surface loss common with asphalt under hail strikes. |
| Snow & ice performance: interlocking, shedding profile | Heavy snow, freeze-thaw, ice dams: smooth aluminum sheds snow efficiently and the interlocking design helps block water intrusion when melt-refreeze cycles occur. (Final snow-load capacity depends on roof structure and local code.) |
| Corrosion resistance: aluminum (won’t rust) | Salt air, coastal humidity, wet climates: aluminum naturally resists rust and corrosion, reducing long-term failure risk in marine or high-moisture environments. |
| Heat / UV durability: baked-on coating system | High heat, intense sun, thermal cycling: coatings resist UV breakdown and temperature-swing fatigue, slowing fading and surface degradation. |
| Moss / algae resistance: smooth coated surface | Wet shade, organic growth: low-porosity metal surface gives moss/algae less to grip, reducing staining and maintenance. |
| Material: heavy-gauge aluminum roof profiles (Slate / Shake / Shingle / Tile / Standing Seam) | All-season structural stability: lightweight, dent-resistant metal system stays stable through large hot-cold swings and severe weather. (Add exact alloy + thickness for maximum spec proof.) |
| Expected lifespan: 50+ years | Long-term durability across climates: avoids re-roof cycles typical of shorter-life materials, even in high-stress environments. |
| Warranty: Lifetime-Limited, non-prorated + 50-year transferable | Lifetime protection + resale value: guarantees long-term material confidence and transfers to future owners. |
Available Profiles in Sequim, Washington:
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Metal Roofing FAQs for Homeowners in Sequim
The following metal roofing FAQs are designed specifically for homeowners in Sequim, Washington. Whether you are building a new home or replacing an existing roof, understanding how roofing materials perform in local weather conditions is essential. From wind and storm protection to fire resistance, hail impact, snow loads, and coastal moisture exposure, Interlock’s Lifetime Aluminum Roofing System is engineered to provide long-term durability, energy efficiency, and peace of mind in Sequim.
