Metal Roofing in Lum, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Lum 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 Lum's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Lum, Washington’s trusted local metal roofing contractor, proudly serving homeowners since 1997. As the exclusive authorized installer of Interlock® lifetime aluminum roofing systems, we deliver unmatched performance, beauty, and durability tailored for the Pacific Northwest’s unique climate. Our heavy-gauge, fire-resistant, and energy-efficient cool roofs are engineered to withstand Lum’s wet winters, heavy snowfall, and seasonal storms, ensuring superior snow shedding and long-term protection. Whether you prefer the timeless look of slate, cedar shingles, shake, Mediterranean tile, or standing seam, our roofs combine classic style with the proven strength of metal. Every installation is protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty, making Interlock the best choice for roof replacement and re-roofing in Lum, Washington.
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
Freeze–Thaw Durable
Endures ~88 freeze–thaw days a year
Snow-Shedding
Built for ~102 cm of snow a year
- Authorized installer of Interlock® Lifetime Aluminum Roofing Systems serving homeowners in Lum and throughout Lewis County
- Aluminum panels coated with the Alunar® Coating System (no visible aluminum surface) for long-term colour retention and sacrificial-layer corrosion resistance
- Designed to withstand Lum’s atmospheric rivers and prolonged wet seasons, reducing leak risk during extended storm episodes
- Corrosion-resistant performance for properties in Lewis County that receive intermittent marine salt exposure from nearby waterways and estuarine breezes
- Smooth Alunar finish discourages moss adhesion and simplifies cleaning on damp Lum roofs prone to organic growth
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Tested to 193+ km/h (120+ mph) for severe windstorms common to southwest Washington, providing uplift resistance for Lum residences
- Snow-shedding panel geometry and load-capable design reduce accumulation and mitigate ice-dam risk during freeze–thaw cycles inland from the coast
- Engineered waterproof installation details maintain integrity through Lewis County’s rapid seasonal temperature swings and persistent moisture loads
- Class A fire-rated available for added resilience where local wildfire season or ember exposure is a concern in the region
- UL 2218 Class 4 impact resistance against hail, falling branches, and storm debris to protect Lum roofs during convective storm events
- High-reflectance cool-roof performance lowers roof-surface temperatures during summer heat episodes and improves attic thermal comfort in Lum homes
- Solar-compatible mounting surface engineered for modern bracket-mounted photovoltaic systems without compromising panel or roof performance
- Fully recyclable aluminum construction and low-maintenance finish support long service life and reduced lifetime material waste for Lewis County homeowners
- Backed by a Lifetime-Limited transferable warranty to preserve long-term protection and resale value for properties in Lum
Metal roofing built for Lum's climate
Averages (10-yr): ~406 mm rain and 102 cm snow per year, ~3309 sunshine hours, mean 9.5°C, typical daily-max winds ~20 km/h with gusts to 94 km/h, and ~88 freeze–thaw days per year.
- 102 cmavg. snow / year
- 406 mmavg. rain / year
- 88freeze–thaw days / year
- 94 km/hpeak wind gusts
- 3309 hrsannual sunshine
- 9.5°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 Lum, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Lum, 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 Lum, 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 Lum, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Lum, 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 Lum 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 Lewis County
Interlock® metal roofing is also installed in these communities near Lum:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Lum, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Lum
The following metal roofing FAQs are designed specifically for homeowners in Lum, 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 Lum.
How does a metal roof handle Lum's heavy snow and freeze-thaw cycles?
Aluminum sheds snow and ice far better than asphalt because its smooth, hard surface prevents ice dams—critical in a climate that averages 102 cm of snow and 88 freeze-thaw days yearly. The four-way interlocking panels create a unified surface that snow slides off before melt-refreeze damage occurs. Unlike wood shakes that absorb moisture and crack, or asphalt that becomes brittle in freeze cycles, aluminum's 3105-H24 alloy maintains flex and strength through repeated freezing. Standing Seam and Slate profiles channel water away most efficiently during the region's 406 mm annual rainfall mixed with snowmelt.
Why doesn't aluminum roofing rust like steel in wet Pacific Northwest weather?
Aluminum cannot rust because it contains no iron—the element that oxidizes. Instead, aluminum forms a protective oxide layer that self-heals when scratched, an advantage in regions with frequent moisture and wind gusts up to 94 km/h that might damage other metals. Interlock's Alunar 70% PVDF fluorocarbon finish is applied to both sides of each panel, offering a 30-year warranty against chalking and fading even in damp climates. This dual-sided coating is especially important in Pacific Northwest conditions where salt air and constant humidity accelerate degradation of single-coated metals.
Is a metal roof worth the upfront cost in Lum?
A metal roof is cheaper over 40–50 years because it's installed once, not replaced twice like asphalt. Interlock carries a lifetime limited, non-prorated warranty for the original owner—meaning no deductible claims and no coverage fade. Asphalt typically lasts 15–20 years; two replacements cost removal, disposal, labor, and reinstallation. With no maintenance (asphalt needs repairs and often moss removal in wet climates), and a one-time 50-year transferable term for the next owner, the math favors metal decisively. Current promotion: no payments and no interest until Spring 2027 or 10% off installation.
Can my existing roof structure support a metal roof, or do I need expensive reinforcement?
No reinforcement needed. Interlock's lightest profile, Cedar Shingle, installs at only 0.41 lb/sq ft—so light that the Mediterranean Tile, despite its authentic appearance, is about 96% lighter than real clay or concrete tile. Your existing roof framing can support this without modification, and Interlock installs directly over most existing shingles, saving tear-off costs. By contrast, real slate or tile roofing requires structural upgrades in many homes. This weight advantage means faster installation and zero hidden structural costs—a major savings in labor and engineering in a region where winter weather windows are narrow.
Will a metal roof keep my home cooler and reduce heating costs?
energy-efficient colors with thermal emissivity of 0.84 and solar reflectance up to 0.55 reflect heat rather than absorb it—important even in cooler climates like Lum, where about 3,309 sunshine hours per year add up. Cool roofs reduce attic temperature swings during the 88 freeze-thaw days, lowering HVAC cycling and extending equipment life. In summer, reflected heat keeps cooling loads lighter; in winter, the insulation layer beneath works uncompromised by absorbed solar gain. The Cool Roof Rating Council rating confirms performance—a measurable energy advantage over dark asphalt that absorbs the same sun.
What's the hail rating, and could it lower my insurance premiums?
Interlock achieves UL 2218 Class 4, the highest impact rating available—it withstands hail up to 1.5 inches and carries a warranty covering perforation from hail. Many insurers offer discounts for Class 4 roofs because claims are rare; contact your agent for specifics. In regions prone to severe weather, the combination of four-way interlocking panels and aluminum's inherent strength means you avoid the costly claim cycles asphalt roofs face after storms. The rating is verified and code-compliant under ICC-ES ESR-1790, giving underwriters confidence in durability data, not marketing claims.
How does a metal roof perform in Lum's winter wind gusts?
The four-way interlocking system is engineered to resist wind speeds up to 120 mph (193 km/h) when installed to specification—far exceeding the typical gusts of 94 km/h and mean daily winds of about 20 km/h in this region. The mechanical lock between panels distributes wind load across the entire roof rather than relying on fasteners or adhesive alone. In Pacific Northwest winter storms, this design prevents uplift, edge-failure, and blow-offs that plague lighter shingles. Warranty coverage applies to proper installation, and the local installer, Interlock Metal Roofing (PNW) Inc., has served the region since 1997, ensuring correct execution in local wind patterns.
How long does installation take, and can you install over my existing roof?
Installation typically takes 2–5 days depending on roof size and complexity. Yes, Interlock installs over most existing roofs—no tear-off required, saving time, labor, and disposal costs. The lightweight panels (Cedar Shingle at 0.41 lb/sq ft) don't stress the existing structure, and the new layer provides additional insulation. This method is especially practical in Lum's rainy climate: a faster install means less weather disruption. The local installer coordinates timing around regional weather windows. Tear-off is avoided unless structural damage is present, keeping your project on budget and your home protected during work.
How much maintenance does a metal roof really need compared to asphalt or wood?
Virtually none. Aluminum won't rot, curl, crack, or split—eliminating the moss treatment, shingle replacement, and gutter debris that plague asphalt and wood in wet climates averaging 406 mm rain and 102 cm snow yearly. The Alunar 70% PVDF coating resists staining and discoloration, so cleaning is optional, not required. Asphalt roofs in damp regions often need moss removal every few years; wood shakes absorb moisture and deteriorate. Interlock is CALGreen-verified for reduced maintenance, meaning you skip annual inspections, repairs, and weather-damage claims. Over 40 years, the maintenance savings rival the material savings.
Is aluminum roofing actually more sustainable than asphalt?
Yes. Aluminum is approximately 95% recyclable at end of life, so your roof becomes feedstock for new products rather than landfill waste. Asphalt shingles are tear-off debris; the cycle repeats every 15–20 years, multiplying disposal costs and environmental impact. Aluminum's durability—typically 50+ years—means far fewer replacements over a century. Manufacturing in Delta, BC since 1998, Interlock minimizes transportation and uses established supply chains. Choosing metal breaks the asphalt replacement treadmill, reducing your home's lifetime carbon footprint. CALGreen verification confirms reduced maintenance and disposal impacts—a measurable sustainability advantage for homeowners prioritizing environmental responsibility.
Is a metal roof a good choice for Lum’s climate?
Yes. Lum averages about 102 cm of snow, 406 mm of rain, roughly 88 freeze–thaw days a year, with peak wind gusts near 94 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.
