Metal Roofing in Grand Mound, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Grand Mound Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
What do Interlock customers in Washington say?
Interlock has 734 published customer reviews from Washington, covering installations reviewed between 1999 and 2026. They average 4.7 out of 5, with 669 collected through independent GuildQuality surveys. Interlock® Slate is the most frequently installed system in the region, appearing in 287 of these projects. Across the surveys that scored individual categories, quality of materials rates highest at 4.9 out of 5.
Metal Roofing Built for Grand Mound's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Grand Mound, Washington’s trusted metal roofing contractor, proudly serving local homeowners since 1997. As the exclusive authorized installer of Interlock® lifetime aluminum roofing systems, we deliver unmatched performance, beauty, and durability tailored to the unique Pacific Northwest climate. Our heavy-gauge, fire-resistant roofs are engineered to withstand Grand Mound’s wet winters, frequent rain, and occasional snow, providing superior snow-shedding and long-term protection against moss, leaks, and wind. Choose from slate, cedar shingles, shake, Mediterranean tile, or standing seam styles—all featuring the advanced Alunar® Coating System for maximum energy efficiency and color retention. Every Interlock Lifetime Roofing System is backed by a Lifetime Warranty, making us the top choice for roof replacement and re-roofing in Grand Mound, WA. Experience the peace of mind and timeless curb appeal only Interlock Metal Roofing can provide.
Performance you can measure (all climates)
Weather Resistant
Tested to 193+ km/h (120 mph) winds
Durable
Lifetime-Limited, transferable warranty
Energy Efficient
Reflective cool-roof lowers cooling costs
Rain & Moisture Proof
Repels ~1370 mm of rain a year
Corrosion Resistant
Aluminum does not develop iron rust
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events in Grand Mound and surrounding Thurston County
- Coated with the Alunar® Coating System (no visible aluminum surface) for durable finish and corrosion resistance on Pacific Northwest roofs
- Tested to 193+ km/h (120+ mph) for severe windstorms common to the I‑5 corridor, providing proven uplift resistance for Grand Mound homes
- Designed for atmospheric rivers that bring intense, prolonged rainfall to Grand Mound and Thurston County — seals and flashings sized for extended wet periods
- Built to resist occasional marine air intrusions and salt‑laden storms from Puget Sound that can reach inland Thurston County neighborhoods
- Low‑profile, smooth panels reduce moss and algae retention in Grand Mound’s damp climate, simplifying seasonal cleaning and maintenance
- Snow‑shedding metal panels minimize buildup and reduce ice‑dam risk during infrequent heavy snow and freeze–thaw cycles
- Engineered connections and coatings limit corrosion and thermal movement from rapid seasonal temperature swings and freeze–thaw stress
- Class A fire-rated available to enhance ember resistance and roof survivability during regional dry spells and elevated wildfire danger
- UL 2218 Class 4 impact resistance for protection against hail, falling branches, and storm debris commonly encountered in western Washington storms
- Energy‑efficient cool‑roof performance lowers attic temperatures during summer heat waves and improves year‑round thermal comfort in Grand Mound homes
- Solar‑compatible design for bracket‑mounted photovoltaic systems, enabling rooftop PV integration without compromising weatherproofing
- Fully recyclable aluminum construction supports long service life and reduces landfill waste for environmentally conscious Thurston County homeowners
- Backed by a Lifetime‑Limited transferable warranty to protect long‑term value for Grand Mound properties and future owners
Metal roofing built for Grand Mound's climate
Averages (10-yr): ~1370 mm rain and 40 cm snow per year, ~2881 sunshine hours, mean 10.8°C, typical daily-max winds ~16 km/h with gusts to 99 km/h, and ~34 freeze–thaw days per year.
- 40 cmavg. snow / year
- 1370 mmavg. rain / year
- 34freeze–thaw days / year
- 99 km/hpeak wind gusts
- 2881 hrsannual sunshine
- 10.8°Cmean temperature
Roof performance depends on the selected profile, tested assembly, roof structure and installation details. Class A fire-rated assemblies are available. Confirm applicable ratings in the testing reports and review the limited warranty before selecting a system.
Interlock Metal Roofing (PNW) Inc.
- 5608 17th Ave NW suite 1574, Seattle, WA 98107, United States
- Phone 206-589-8423
- Local lines Bellevue 425-225-4805 · Bellingham 360-502-4018 · Tacoma 253-352-2725 · Stanwood 206-202-7814 · Vancouver 360-873-5878
- Sales & Marketing sales@washingtonmetalroofing.com
- Toll-Free 1-866-733-5811
- Customer Service pnwservice@interlockroofing.com
- www.WashingtonMetalRoofing.com
- License WA #INTERMR75406
- Serving Washington since 1997 — 28 years
Hours
- Monday9:00 AM – 5:00 PM
- Tuesday9:00 AM – 5:00 PM
- Wednesday9:00 AM – 5:00 PM
- Thursday9:00 AM – 5:00 PM
- Friday9:00 AM – 5:00 PM
- SaturdayBy appointment
- SundayBy appointment
Interlock Metal Roofing (PNW) Inc. – Washington is a trusted metal roofing contractor proudly serving homeowners and businesses throughout Washington State. With decades of experience in the roofing industry, Interlock has built a reputation for unmatched quality, reliability, and customer satisfaction. As a specialized installer of premium aluminum and standing seam metal roofs, Interlock is an exclusive authorized installer of top-tier roofing systems designed for performance, longevity, and weather resilience — specifically engineered for the Pacific Northwest climate. Founded on principles of craftsmanship and integrity, Interlock Metal Roofing (PNW) Inc. has completed thousands of roofing projects with precision and professionalism, earning the loyalty of customers from Seattle to Spokane. Our team is known for timely project delivery, transparent communication, and exceptional workmanship, backed by robust warranties and industry-leading materials. Interlock’s commitment to excellence has been recognized through local and regional industry awards for safety, quality, and customer service. We stand out for our rigorous training standards, OSHA-certified crews, and adherence to best practices in roofing performance and installation safety. Whether it’s a residential metal re-roof, commercial roof installation, or custom architectural metal roofing, Interlock Metal Roofing (PNW) Inc. brings trusted expertise, lasting product solutions, and an unwavering focus on client satisfaction. Homes and businesses throughout Washington choose Interlock as their go-to metal roofing specialist because we deliver durable, high-performance roofs that stand the test of time.
Recognition GuildQuality Guildmaster Award — verified customer satisfaction (GuildQuality)
Accredited BBB Accredited A+
Get a Free Metal Roof Estimate in Grand Mound, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Grand Mound, 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. |
| 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 Grand Mound, Washington:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Washington
Completed Interlock® metal roofs near Grand Mound, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by an Interlock Installer. Explore verified Interlock® installations near Grand Mound, Washington, United States on the interactive project map and photo grid — filter by roof profile (Slate, Cedar Shingle, Shake, Mediterranean Tile, Standing Seam, Solid Copper), colour and year of completion.
Open Grand Mound on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
Other then the materials not being delivered when they said they would be, they did a great job.
I have enjoyed the new roof you have installed for almost a year now, and I want to say I am so pleased with it. Best of all it was recognized in my taxes and that was especially nice. I have to admit, I have the best looking roof in my neighborhood and it is permanent.
Nearby service areas in Thurston County
Interlock® metal roofing is also installed in these communities near Grand Mound:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Grand Mound, our team installs Interlock® metal roofing across:
