Metal Roofing in Santiago, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Santiago Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
What do Interlock customers in Washington say?
Interlock has 732 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 285 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 Santiago's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Santiago, Washington’s trusted metal roofing contractor and exclusive authorized installer of the Interlock® Lifetime Roofing System. Since 1997, we have provided homeowners with premium roof replacement and re-roofing services designed specifically for the unique Pacific Northwest climate. Our heavy-gauge, fire-resistant aluminum roofs are engineered to withstand Santiago’s wet winters, heavy snowfall, and seasonal storms, offering superior snow shedding and long-term protection. With energy-efficient cool roof technology, our roofs help reduce energy costs during hot summers and insulate against winter cold. Choose from the timeless beauty of slate, cedar shingles, shake, Mediterranean tile, or standing seam profiles—all protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty. Trust Interlock Metal Roofing (PNW) Inc. for a roof that delivers unmatched durability, performance, and curb appeal for your Santiago, Washington home.
Performance you can measure (all climates)
Weather Resistant
Tested to 193+ km/h (120 mph) winds
Durable
Lifetime-Limited, transferable warranty
Rain & Moisture Proof
Repels ~2771 mm of rain a year
Energy Efficient
Reflective cool-roof lowers cooling costs
Snow-Shedding
Built for ~104 cm of snow a year
- Authorized Interlock® installers serving Santiago and homeowners across Grays Harbor County
- Aluminum is coated with the Alunar® Coating System (no visible aluminum surface)
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Interlocking panel system tested to 193+ km/h (120+ mph) for resistance to severe Pacific windstorms affecting Santiago’s coastline
- Advanced waterproof installation provides durable leak protection through Grays Harbor County’s prolonged wet seasons
- Corrosion-resistant finish engineered for coastal salt air and marine exposure along Santiago’s shorelines
- Built to shed concentrated runoff during atmospheric river events that drive extreme rainfall across Santiago and nearby beaches
- Surface finish and tight joints reduce moisture retention and inhibit moss and algae growth common on damp Santiago roofs
- Class A fire-rated available for homeowners seeking enhanced ember resistance where vegetation and structures create fire risk
- UL 2218 Class 4 impact resistance helps protect roofs from hail, falling branches, and storm debris
- Cool-roof performance lowers heat gain during occasional Pacific Northwest heat waves and improves attic comfort in Santiago homes
- Designed for direct compatibility with bracket-mounted photovoltaic systems on Santiago properties
- Fully recyclable aluminum supports long-term sustainability goals for Grays Harbor County homeowners
- Low-maintenance panels outlast asphalt shingles in persistent coastal moisture and salt‑air conditions
- Multiple architectural profiles replicate slate, cedar shake, and tile while offering standing-seam options for high-wind mechanical fastening
- Backed by a Lifetime-Limited transferable warranty to protect long-term value for Santiago residences
Metal roofing built for Santiago's climate
Averages (10-yr): ~2771 mm rain and 104 cm snow per year, ~2728 sunshine hours, mean 10.3°C, typical daily-max winds ~14 km/h with gusts to 117 km/h, and ~42 freeze–thaw days per year.
- 104 cmavg. snow / year
- 2771 mmavg. rain / year
- 42freeze–thaw days / year
- 117 km/hpeak wind gusts
- 2728 hrsannual sunshine
- 10.3°Cmean temperature
Interlock® aluminum roofing is engineered for these conditions — wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated, Class A fire-rated, and built to shed snow and resist ice dams and freeze–thaw cracking, backed by a lifetime limited warranty.
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 [email protected]
- Toll-Free 1-866-733-5811
- Customer Service [email protected]
- 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 Santiago, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Santiago, 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 Santiago, 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 Santiago, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Santiago, 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 Santiago on the interactive project map →Browse all Interlock® projects in Washington →See more Interlock® projects →
What our customers are saying:
Thanks for a very positive roofing experience! Our new roof is so beautiful we’re thinking of charging a fee to all the gawking neighbors that stop by to admire it!!! This was fun, positive experience from start to finish. Our sales rep spent three hours at our home going over every possible detail with us. He was knowledgeable, friendly and answered all our questions. As you can see by the pictures we have a pretty basic roof. There was no tear off to do; still, our three installers were 80% done on the very first day! Everything was done and cleaned up to our satisfaction by the end of day two. Our installers were friendly, courteous and hard working. I watched them for a few minutes as they all worked like a finely tuned machine installing our roof in perfect rhythm. For us, Interlock meant that the third time was the charm. We’d tried to do business with two other companies. The first took a large amount of money as a down payment and gave absolutely no customer service for two months. We got our money back and started over. The second company gave an inaccurate bid. Needless to say, we entered into this contract with some trepidation. interlock is a fabulous company and we’d recommend them to anyone in the market for a new roof!
We are writing this letter to show our appreciation for the wonderful job that was done on our roof. From the date your company representative met with us in our home to the date of completion, words cannot express how completely satisfied we are with your company. We definitely wanted a quality roof and were very impressed by the representation that was given to us. The product you provide was enough for us to make our decision, however it was a huge plus not to have to deal with a pushy salesman and to have such polite, friendly and hard working men providing the service. It was a pleasure to have them around our home. The quality, craftsmanship and lifetime warranty of this roof far outweighs the increased costs over other roof systems. However, other roof systems don't come with lifetime warranties and many only last for 8 to 10 years. We may have paid a little more initially, but how wonderful it is to know we will never have to re-roof our home again. And in addition to all of the above, it looks so beautiful and has added so much style to our home. I never dreamed a roof could make such a difference. Again, Thank you so much and be sure to know we will highly recommend your company to all of our family and friends.
I am very pleased with the entire experience with Interlock Roofing. Ross did a fantastic job of showing me all of the options available, and explaining how Interlock is different from other roofing. This was not a hard sales pitch. I was pleasantly surprised by how affordable a metal roof was. I had five other estimates for a traditional composite roof, and the price difference for a forever roof was negligible considering all the benefits. Next, the installation. These guys were amazing! Only two guys doing the demo and reroof, but very hard workers and did a fantastic job. It seems rare these days to find skilled tradesmen that take pride in their work, and these guys exceeded my expectations. I also took advantage of Interlock’s financing. Drew was very helpful and accommodating. The whole process was taken care of through Interlock, making it super convenient and great communication throughout. I will highly recommend:)
We just wanted to let you know how thoroughly-pleased we are with our new Interlock Roof. It is absolutely beautiful and we have had a lot of people stopping as they walk or drive by to admire how nice it looks. Everything progressed on the job exactly as you had shared with us when we signed the contract. There were no surprises. From the beginning when we got the call to set up a start date, to the final clean up and retrieval of the waste bin everything was handled so professionally. Viktor and Alex were a dream to work with-so-pleasant and each day everything was left so tidy that it would have been hard for guests to tell that we were in the middle of a re-roofing job. We will highly recommend your product and doing business with such a professional and obviously well run company.
I have already recommended them. Those guys were amazing. Peter, Victor, and the other installation guys were just unbelievable. It is a great company, and they did a great job with my roof. I get compliments all the time. It was a wonderful experience. They did a wonderful job on the house. It looks fantastic.
Interlock Roofing is amazing. From the first day I met their salesman to the day they started work on our barn and house. They were very easy to talk to and express our concern about how important it was to keep our hay safe from rain and the ground around the barn safe for the animals. They were fast exceptionally clean and so much fun to get to know. I definitely would recommend this company to anyone who wants to have a roof that will last a life time. Thank you for an amazing job and two beautiful roofs!
My wife and I want to express our complete satisfaction with the "Aged Copper" roof your firm installed on our "Barn-house" and gazebo. The two roofs have a high quality appearance and they enhance the looks of the property. We are looking forward to many years of satisfaction. We are now planning to re-paint the house with a color to better blend with the roof. The work performed by your installers was outstanding. They were friendly and very professional. They worked efficiently and energetically, and it was obvious they had the skills to do the job. Thank you for being such an excellent firm.
My husband and I would like to thank you for coming to our residence and explaining your product and all of its advantages. We were very impressed at this time and excited to start the beautification process of our home, which has been in my husband’s family for 5 generations now. It has undergone many remodels, upgrades, and changes throughout the years with a lot of help from friends and family. We will be celebrating its 100th birthday this year. The new roof is definitely a wonderful way to do so! The whole Interlock family was friendly and extremely easy to work with from the beginning of this process to the end. The job was started on time and finished when promised. We are very pleased with how smoothly the project went and very thankful that we were not the ones on top of the house!
HELLO! I am Gerry from Olympia, Washington. A few years ago, I had my re-roofing done by INTERLOCK ROOFING SYSTEM for my house here in Olympia. I would like to thank the INTERLOCK ROOFING SYSTEM for the best, beautiful metal roof I ever had; the color choice never changed in spite of the weather condition here in Washington. So, if you want your home to deserving a thorough, keen, professional touch, quality, and professionalism, I would highly recommend INTERLOCK LIFETIME ROOFING SYSTEMS for your COMPLETE METAL ROOFING.
We both work for Nordstrom and have come to expect a certain level of customer service. Both Paul and Ross were exceptional in this regard. They were knowledgeable friendly and very thorough! I would highly recommend interlock for anyone looking into metal roof options.
The roof is absolutely beautiful and compliments our home. The work was fast and professional. Communication about scheduling. Clean up of job site. We absolutely love the roof.
We were extremely pleased with Interlock Roofing as our selection to install an aluminum roof on our house and two outbuildings. The installation team were extremely hard workers and were always courteous and conscientious and left our project very clean. We would highly recommend all of them to anyone interested in a new roof including Paul Wright and the administration staff. Ron and Joanne Quiring nothing
Nearby service areas in Grays Harbor County
Interlock® metal roofing is also installed in these communities near Santiago:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Santiago, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Santiago
The following metal roofing FAQs are designed specifically for homeowners in Santiago, 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 Santiago.
Does metal roofing handle heavy snow and ice buildup in Santiago winters?
Yes. Interlock's four-way interlocking aluminum panels shed snow and ice effectively because the smooth, sloped profiles don't trap moisture the way asphalt does. Santiago averages about 104 cm of snow annually with roughly 42 freeze-thaw cycles per year—conditions that crack and curl asphalt shingles but have no effect on aluminum. The panels' light weight (the Shingle profile weighs ~0.41 lb/sq ft) allows snow to slide cleanly without stressing your structure, and optional snow guards prevent unsafe slides. Aluminum's oxide layer never deteriorates from salt and moisture exposure, so your roof stays intact through every winter cycle.
Why does freeze-thaw damage asphalt but not an aluminum metal roof?
Asphalt absorbs water; when it freezes and thaws 42 times per year as Santiago experiences, the trapped moisture expands and contracts, causing cracking, curling, and premature failure. Aluminum doesn't absorb water. Interlock's roofing-grade 3105-H24 / 3003-H24 aluminum alloy (ASTM B209) is naturally non-porous, so freeze-thaw cycles cannot damage it. The Alunar® 70% PVDF fluorocarbon finish on both panel sides adds another barrier against moisture penetration. Over a typical 50-year roof life, this means your aluminum roof survives hundreds of freeze-thaw events while asphalt replacements crumble around you.
With 2,771 mm of rain yearly, how does metal roofing keep water out?
Your roof must handle 2,771 mm of annual rainfall in Santiago, and the four-way interlocking design ensures water flows off rather than pooling. The male and female interlocks along panel edges and ends create a labyrinth seal that sheds water sideways and downward, even in wind-driven rain. When installed to ICC-ES ESR-1790 specification over solid decking with underlayment, no water penetrates to the substrate. The interlocking geometry also handles the region's typical gusts up to 117 km/h without lifting or separating. Aluminum panels themselves cannot rot or swell from moisture, so even if water did breach the interlocks (extremely rare when installed correctly), it causes no decay.
Can aluminum roofing rust or corrode in Santiago's wet climate?
No. Aluminum contains no iron, so it cannot rust chemically. When aluminum is exposed to air, it forms a thin oxide layer that prevents further oxidation and self-heals when scratched—a process called passivation. Interlock coats both sides of every panel with Alunar® 70% PVDF fluorocarbon finish (30-year warranty against chalking and fading per ASTM D4214), adding maximum protection in wet, salt-influenced climates. Over a roof's 50+ year life in Santiago's 2,771 mm annual rainfall, aluminum remains structurally sound while steel roofs oxidize and asphalt deteriorates. This is why Interlock panels are installed from Pacific coastal homes to Antarctic research stations.
Does hail damage metal roofing, and can it lower my insurance costs?
Interlock metal roofing is rated UL 2218 Class 4 for impact resistance—the highest classification available—and the Guardian Warranty covers perforation from hailstones up to 1.5 inches. Most hail in the Pacific Northwest falls below that threshold. The non-combustible aluminum construction and superior durability often qualify metal roofs for insurance discounts (check with your carrier). Compared to asphalt shingles, which dent easily and lose granules in hail, metal panels restore their shape and retain structural integrity. In regions with frequent hail, metal roofing has become the preferred choice precisely because the impact resistance eliminates repeat claims and keeps your premiums low.
Will a metal roof blow off in Santiago's wind gusts?
No. Interlock metal roofing is warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. Santiago's typical gusts reach 117 km/h, well within the warranty limit. The four-way interlocking system locks panels together mechanically—not just fastened—so each panel braces the ones around it. Wind pressure lifts the entire assembly together, not individual panels. This distributed-load design is far superior to overlapped shingle systems, where wind peels back exposed edges. Proper installation by Interlock Metal Roofing (PNW) Inc., your local installer since 1997, ensures fasteners and interlocks are engaged to spec, keeping your roof secure through any storm the region can produce.
Can my home's structure handle a metal roof, or will I need reinforcement?
Most homes need no structural reinforcement. Interlock's Slate profile weighs ~0.41 lb/sq ft, Cedar Shingle ~0.41, Shake ~0.58, and Mediterranean Tile ~0.59 lb/sq ft—about 96% lighter than concrete or clay tile. For comparison, asphalt shingles weigh ~2.5–3 lb/sq ft, so metal roofing is actually lighter than what many older homes were built to carry. The Tile profile, despite its authentic appearance, imposes negligible load. Even if your current roof is asphalt, Interlock panels typically install directly over the existing layer without structural upgrades. A local engineer can verify your home's capacity (usually a formality), but weight is rarely a barrier. This advantage saves tens of thousands in reinforcement costs.
What metal roofing styles are available, and do they look like real slate or tile?
Interlock offers five profiles: Slate, Cedar Shingle, Shake, Standing Seam, and Mediterranean Tile. Each replicates traditional materials through authentic panel geometry—dimensional texturing, shadow lines, and dimensional relief—manufactured from roofing-grade 3105-H24 / 3003-H24 aluminum. The Slate profile mimics slate's clean, staggered planes; Cedar Shingle and Shake replicate wood's varied grain and thickness; Tile features curved, overlapping segments. All profiles are available in multiple colors and finishes. Since the panels are aluminum, they maintain color and texture for decades (Alunar® 70% PVDF finish carries a 30-year warranty against fading and chalking). You get the aesthetic of premium materials without the weight, fragility, or maintenance burden.
What is the lifetime warranty on metal roofing, and does it transfer if I sell?
The Guardian Warranty is a lifetime limited, non-prorated material warranty for the original homeowner—covering rusting, rotting, splitting, cracking, curling, and loss of impact resistance. It's one-time transferable, providing the next owner 50 years of coverage from project completion. This dual-owner term recognizes that aluminum roofing outlasts typical ownership periods. No other roofing material offers this combination: a lifetime promise for you, backed by Interlock's manufacturing since 1998 in Delta, BC, plus explicit coverage extending into your home's next chapter of ownership. When you sell, the warranty becomes a significant value-add that buyers recognize and pay for.
Is aluminum roofing recyclable and better for the environment than asphalt?
Yes. Aluminum is approximately 95% recyclable and retains its properties through infinite recycling cycles. When an Interlock roof eventually reaches end-of-life (likely after 50+ years in Santiago's climate), it enters the aluminum scrap stream rather than a landfill. Asphalt shingles, by contrast, generate roughly 11 million tons of landfill waste annually in North America—and must be replaced every 15–20 years due to UV damage and freeze-thaw cracking (42 cycles annually in Santiago). Over a century, a building might require five asphalt replacements versus one metal roof. Aluminum eliminates the tear-off-to-landfill cycle entirely. The manufacturing process, centered in Delta, BC, keeps transportation emissions minimal for the Pacific Northwest region, making Interlock a genuinely responsible choice for homeowners concerned with long-term environmental impact.
Is a metal roof a good choice for Santiago’s climate?
Yes. Santiago averages about 104 cm of snow, 2771 mm of rain, roughly 42 freeze–thaw days a year, with peak wind gusts near 117 km/h. Interlock® aluminum roofing is wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated and Class A fire-rated, and its four-way interlocking panels shed snow and resist ice dams and freeze–thaw cracking — all backed by a lifetime limited, transferable warranty.
