Metal Roofing in Santiago, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally

Santiago Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997

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.

Interlock metal roofing styles including slate, cedar, shake, tile, and standing seam in Santiago, Washington

Performance you can measure (all climates)

Wind- and storm-resistant Interlock® metal roof rated to 193+ km/h for Santiago, Washington

Weather Resistant

Tested to 193+ km/h (120 mph) winds

Interlock® aluminum metal roof in Santiago, Washington backed by a Lifetime-Limited, transferable warranty

Durable

Lifetime-Limited, transferable warranty

Rain- and moisture-proof Interlock® metal roof for Santiago, Washington

Rain & Moisture Proof

Repels ~2771 mm of rain a year

Energy-efficient cool-roof Interlock® aluminum metal roofing in Santiago, Washington

Energy Efficient

Reflective cool-roof lowers cooling costs

UL 2218 Class 4 impact- and hail-resistant Interlock® metal roof in Santiago, Washington

Impact Resistant

UL 2218 Class 4 — top hail rating

Snow-shedding Interlock® metal roof built for Santiago, Washington winters

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.

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+

Part of the Interlock® certified installer network →

Get a Free Metal Roof Estimate in Santiago, Washington

Interlock® Aluminum Roofing — all-climates performance specs for Santiago, Washington

Spec / RatingClimate / 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 4Hail and impact debris: highest impact classification; resists cracking, splitting, and surface loss common with asphalt under hail strikes.
Snow & ice performance: interlocking, shedding profileHeavy 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 systemHigh heat, intense sun, thermal cycling: coatings resist UV breakdown and temperature-swing fatigue, slowing fading and surface degradation.
Moss / algae resistance: smooth coated surfaceWet 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+ yearsLong-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 transferableLifetime 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.

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.

4.6 / 5 — from 771 verified customer reviews in Washington

What our customers are saying:

★★★★★
Review: February 19, 2020Completion: February 19, 2020

It's been about 6 weeks since our new roof was completed, and we are thrilled with the result. The whole process from start to finish was seamless and very efficient. As a salesperson myself, I was impressed with the 'no pressure' approach to selling us the roof and the information that was provided to us to make an informed decision on the type of roof for our home. We chose the black slate and it looks very smart and has transformed the look of our home considerably. Since the roof was installed, we have had the usual mixed bag of Washington weather - heavy rain, hail, strong winds, and frost. Our roof has been put to the test and passed with flying colors. Frank observed the installation process and was impressed with the seamless flashing, custom-made on site, and state of the art vent coverings. Our roof looks beautiful and stands out from the others in our neighborhood. We were particularly impressed with the workmanship of Victor and Mark Lomakin, the two men who installed the roof. They were punctual, fast, courteous, respectful, efficient and very professional. Our neighbors also commented on how well they worked. When the roof was complete, they cleared away all debris and even removed the unwanted satellite dish from our roof. It couldn't have gone better. We received all the financial documentation in a timely manner and all of the employees we have dealt with have been very knowledgeable and helpful. Our only criticism is that it would be nice to have an online payment facility for overpayments. Currently the only way to do that is to mail a payment to Canada but we don't have checks so we would have to purchase money orders and mail them as we intend to make over-payments along the way. We would happily recommend Interlock to anyone looking for a new roof. Kind regards Jennifer and Frank Herboldsheimer Ocean Shores, WA

★★★★★
Review: July 23, 2015Completion: July 8, 2015

Of the five name brand roofing contractors I screened for this project I chose Interlock and I am very pleased with the roof. Coordination and communication was critical especially since Interlock was to perform the installation immediately following another contractor performing a siding replacement. Communication with the interlock team was great and they remained flexible. Interlock was able to adjust their installation timeline as issues popped up with the siding project. Interlock promptly scheduled and dispatched materials and crew as soon as the siding contractor cleared out. I was a bit concerned about introducing a ">metal roof to the neighborhood, but could not be happier with the end result. In an effort to help tie everything together I had the siding contractor match the fascia wrap and gutters to the interlock ">roof black slate finish. The installation team was courteous, professional, and they notified me of any issues they ran across with the structure during the tear-off phase. Clean-up performed by the installation team was better than that performed by other contractors that had worked at the site. Great attention to detail and they took extra measures to protect sensitive areas around the house. I am currently working with their finance department as I Refinance the house and they are by far the friendliest finance team I have ever worked with. Great communication and customer care standards! The roof looks amazing and definitely grabs the attention of people driving by. The most amusing reaction so far was while I was watering the plants in the front yard a vehicle drove by, stopped abruptly, turned around, and pulled up into the driveway. A salesman in corporate attire for another roofing company stepped out of the vehicle and started asking questions about the roof. I was very familiar with the brand he represented because their product is rated among the best asphalt roofing products in the country. I thought that was quite amusing because here I am giving him contact information for a competitor . He was interested in something similar for his home so we talked for a bit about the Interlock Roof and he was very impressed. Reminded me of those old Coke versus Pepsi commercials.

★★★★★
Review: July 27, 2007Completion: July 25, 2007

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!

★★★★★
Review: July 22, 2007Completion: March 13, 1999

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.

★★★★★
Review: July 19, 2025Completion: June 18, 2025

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:)

★★★★★
Review: April 2, 2024Completion: March 12, 2024

I installed a new metal interlock roof on my home in Anacortes. A big part of the cost was removing the existing concrete tiles from my roof which are a challenge. From the beginning working with sales, Paul and Ross was a pleasure...very responsive and professional. The installion crew and project managers, Tony and Patrick were terrific to work with. There were a few complications due to the existing roof but the Interlock team worked with me to resolve those issues. The crew were punctual and the installation proceeded on schedule. The cleanup was immaculate. My main goal was NOT to see any further leaking in my lifetime and hopefully that will be achieved. The roof looks great. If you are in the market for a metal roof, I would certainly recommend Interlock.

★★★★★
Review: June 10, 2022Completion: March 14, 2022

Positive: Professionalism, Punctuality, Quality, Responsiveness, Value Thank you Interlock for our beautiful new roof! Installation was great from start to finish. We have lots of neighbors walking by and saying “wow” and that it doesn’t look like a metal roof. We are so happy to have our “forever” roof and to never have to re-roof again! 😀 Only wish we had done it SOONER! ">" alt="After\_WAEV21051\_Woodinville-WA-98077\_Interlock-Metal-Roofing\_Deep-Charcoal-Aluminum-Roof-Shingles-Solar-Crystalline-Panels-2" width="300" height="225" /> ">" alt="After\_WAEV21051\_Woodinville-WA-98077\_Interlock-Metal-Roofing\_Deep-Charcoal-Aluminum-Roof-Shingles-Solar-Crystalline-Panels-1" width="300" height="225" />

★★★★★
Review: December 10, 2020Completion: December 31, 2020

Just a few days ago my husband and I were excited to see our new Interlock aluminum roof completed in the gorgeous eye popping finish of copper penny shake topping our newly purchased log home in Bellingham WA. We are so thankful for the signage that the company uses when completing new roofs because when we were first looking at our home and considering a purchase we happened to drive by a house just down the road that had the same " title="copper" data-wpil-keyword-link="linked">copper finish aluminum Interlock roof that we eventually decided on. Seeing this roof installed on another house was the impetus that we needed to call the company and begin our inquiry well before we even purchased our home. We did our homework and considered other roofing materials and companies, but Interlock stood out in our minds as our top choice. The Interlock salesmen, Ross and Paul also went out of their way to come and look at the home and the roofing and bring samples to put on the roof for us to see during our inspection period. They also met with us immediately after closing on a Sunday as we wanted to lock in on a date for installation as soon as we could. We have a very large square footage of roofing, as well as a roof line that is very prominent on the house and we wanted to do something to enhance the stately character for what is definitely a very magical house and property. We have only now owned our house for less than two months, and already have our beautiful new roof completely installed. As we closed on our house in mid-October and we live in the Pacific NW near the Canadian border, this is already a feat. The team of roofers who were sent by Interlock to do our installation were some of the hardest working, most focused, and skilled labor crew we have had the pleasure of coming across. They completed the job in 2.5 weeks, working weekdays and Saturdays, arriving at 7:30 AM and working until 6 PM into the darkness with headlamps on. They worked in rain, cold, and very windy conditions, removing 90,000 lbs. of clay " data-wpil-keyword-link="linked">tile roofing and replacing it with the Interlock 100 year warrantied high quality roofing. The team was extremely respectful, also replacing a skylight that we added to the job mid-way and reinforcing roofing around other skylights that appeared to be leaking. All members of the Interlock company that we have spoken with or had contact with otherwise have been friendly and personable, respectful, and quickly and effectively addressed any questions or issues that we have brought to their attention. We feel safe and secure under our beautiful and functional Interlock roof that is quiet when it rains and lets the water run off in rivulets into the eaves. We thank everyone at Interlock and hope to have a long and successful relationship with Interlock and our new roof.

★★★★★
Review: February 11, 2019Completion: January 13, 2019

We are very pleased with our new roof installed by Interlock Metal Roofing. The house looks beautiful, more than I imagined. You Paul Wright, as our salesman, are appreciated for all the information about the product and the no pressure approach you do. The installers were wonderful. They were great to work with—cleaned the area around the house each night. Our house was three days from start to finish …amazing to watch. We couldn’t be happier with the service and the product.

★★★★★
Review: April 10, 2018Completion: July 18, 2017

To Whom It May Concern: It is our pleasure to highly recommend Ross and Interlock Roofing for your next roofing project. Our roof was installed in August of 2017 it’s amazing the performance it provides to our home. The temperature indoors during the summer is cooler allowing energy savings, our Shake profile stands out with lasting beauty and durability. The installation crew is as great as the product they are polite and professional and went above our expectations they answered all our questions with no concerns. Our investment to have Interlock roof on our home gives us Peace of mind knowing for years to come we will never have to worry about our roof again. We would not hesitate to recommend Interlock Roofs and their awesome products to anyone looking for a new roof.

★★★★★
Review: August 1, 2006Completion: July 18, 2006

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.

★★★★★
Review: October 26, 1999Completion: October 6, 2018

What a substantial difference the Interlock aluminum roof has made to the appearance of my hundred year old house. The haunted house look changed instantly into desirable real estate. The people who sold me the house have said they wish they had asked more for it now! My previous roofer, who I have used for many years on five different roofs with excellent results; drove by and said he knew it was a good job. He also wanted to recommend Interlock roofing to another customer who wanted something better than composition roofing. The service was great, the sheet metal engineers were industrious, exacting workers, and there have been no problems with anything. It looks so solid and neat; I cannot describe it exactly, but I will never be happy with composition roofing again. The leaves slide right off so it is always clean, and shows off the gables and fancy lines of the house so well... I love it!

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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.

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