Metal Roofing in Granger, Washington — Lifetime Interlock® Aluminum Shingles Installed Locally
Granger 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 Granger's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is Granger, 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 unique weather challenges of the Pacific Northwest. Our heavy-gauge, fire-resistant, and energy-efficient cool roofs are engineered to withstand Granger’s seasonal snow, heavy rains, and summer heat, 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 Granger, WA.
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 ~72 freeze–thaw days a year
Corrosion Resistant
Aluminum won’t rust or corrode
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Aluminum panels are coated with the Alunar® Coating System (no visible aluminum surface) to maximize paint adhesion, UV stability, and corrosion resistance
- Interlocking panel geometry and tested high-wind performance resist uplift from valley gusts and windstorms that affect Granger rooftops
- Designed to shed snow and minimize ice-dam formation during Yakima County freeze–thaw cycles and occasional winter storms
- Class A fire-rated available; engineered for ember resistance and added protection during regional wildfire periods
- UL 2218 Class 4 impact resistance protects against hail, falling orchard branches, and debris common to Central Washington storm events
- Reflective Alunar finish reduces solar heat gain and lowers attic temperatures during Granger’s summer heat waves
- Standing-seam mechanical fastening uses concealed clips to accommodate thermal movement across large daily temperature swings
- Durable coating and non-porous surface resist degradation from agricultural dust and mineral deposits found in the Yakima Valley
- Low-maintenance finish minimizes staining and biological growth—moss growth is uncommon in Granger’s semi-arid conditions
- Solar-ready panel profiles accept bracket-mounted photovoltaic systems without compromising the coated surface
- Engineered flashing details and interlocks provide robust leak-control at valleys, penetrations, and roof transitions typical of residential designs
- Fully recyclable aluminum construction and long service life reduce lifecycle environmental impact for sustainability-minded Granger homeowners
- Backed by a Lifetime-Limited transferable warranty tailored for long-term protection and resale value in the Granger/Yakima County market
Metal roofing built for Granger's climate
Averages (10-yr): ~222 mm rain and 30 cm snow per year, ~3524 sunshine hours, mean 13.3°C, typical daily-max winds ~15 km/h with gusts to 84 km/h, and ~72 freeze–thaw days per year.
- 30 cmavg. snow / year
- 222 mmavg. rain / year
- 72freeze–thaw days / year
- 84 km/hpeak wind gusts
- 3524 hrsannual sunshine
- 13.3°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 Granger, Washington
Interlock® Aluminum Roofing — all-climates performance specs for Granger, 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 Granger, 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 Granger, WA
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Granger, 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 Granger 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 Yakima County
Interlock® metal roofing is also installed in these communities near Granger:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Granger, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Granger
The following metal roofing FAQs are designed specifically for homeowners in Granger, 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 Granger.
Will a metal roof handle Granger's freeze-thaw cycles without cracking or warping?
Yes — aluminum expands and contracts with temperature swings, but it doesn't crack, rot, or absorb moisture the way wood and asphalt do. With about 72 freeze-thaw days per year in Yakima County, your roof faces real stress, but the 3105-H24 aluminum alloy is engineered for exactly this. It won't split or curl like shingles. The Alunar coating on both sides prevents corrosion during those wet-freeze transitions, so you get material stability through the whole winter cycle.
How does a metal roof perform with Granger's snow load and ice dam risk?
Metal's smooth, interlocking surface sheds snow and ice faster than asphalt, reducing ice dam buildup. Granger averages about 30 cm of snow annually across the Yakima County region. Because Interlock panels weigh just 0.41 lb/sq ft for the Slate profile — roughly 96% lighter than concrete tile — your home's frame carries the load with zero structural reinforcement needed. Snow slides off cleanly instead of sitting, and the low weight means even accumulated snow won't overstress your structure the way traditional tile would.
Does aluminum roofing rust like steel, or will I have corrosion problems?
Aluminum cannot rust because it contains no iron. When scratched or exposed, it forms a self-healing oxide layer that protects the metal underneath — the same process that keeps aircraft safe in flight. Steel roofing rusts from the inside out; aluminum doesn't. The Alunar 70% PVDF fluorocarbon finish is applied to both sides of every panel (upper and underside), giving you extra corrosion defense during Granger's wetter months when you get about 222 mm of annual rainfall. That dual-coat protection is warranted 30 years against fading and chalking.
Can a metal roof reduce cooling costs in our area's sunny climate?
Absolutely. Granger receives about 3524 hours of sunshine annually, and Interlock's energy-efficient colors have thermal emissivity of 0.84 and initial solar reflectance up to 0.55 — meaning they bounce heat away instead of absorbing it like asphalt. Dark asphalt shingles turn your attic into an oven; reflective metal stays cool. You'll notice the difference on hot days when outdoor temperatures climb. The Cool Roof Rating Council certification confirms measurable energy savings, and that translates to lower summer air-conditioning demand without sacrificing the look you want.
Does Granger get enough hail to matter, and will my insurance company care?
Yakima County wind gusts reach 84 km/h, and hail is always a risk in spring. Interlock panels carry a UL 2218 Class 4 impact rating — the highest available — and the warranty explicitly covers perforation from hailstones up to 1.5 inches. That's the spec insurers recognize. Many carriers offer premium discounts for Class 4 roofs because the claims data shows they hold up. Steel dents; aluminum with this impact rating doesn't perforate. Talk to your agent about that discount — it often offsets or beats the install cost over a few years.
What warranty comes with Interlock metal roofing, and what does it actually cover?
The Guardian is a lifetime limited material warranty for you as the original owner, non-prorated — meaning full coverage, not a declining schedule. It covers rusting, rotting, splitting, cracking, curling, and loss of impact resistance. If you sell, the warranty transfers once to the next owner for 50 years from completion date. That's real protection, not marketing language. You're buying the last roof you'll install; your buyers get decades of peace of mind. The 30-year coating warranty (Alunar PVDF, tested to ASTM D4214 and D2244 standards) runs separately and covers fade and chalk.
How much maintenance does a metal roof need compared to asphalt or wood?
Metal requires almost no maintenance — no annual inspections for curling, no moss treatments, no wood decay. Asphalt shingles need regular checks and break down in UV; wood shakes rot and split from moisture and freeze cycles. Interlock aluminum doesn't absorb water, doesn't decay, and the interlocking design sheds debris. Twice a year, a quick visual scan from the ground and you're done. The CALGreen-verified low-maintenance rating reflects that simplicity. You save the cost and time of repairs while your roof performs year after year through Granger's 72 annual freeze-thaw days without degradation.
Can you install a metal roof over my existing asphalt shingles, or do I need a tear-off?
Most of the time, yes — you can install directly over existing asphalt. Because Interlock profiles weigh 0.41 to 0.59 lb/sq ft depending on style, no structural reinforcement is required, and the panels sit flat over old shingles without risk of compression or failure. Interlock Metal Roofing (PNW) Inc. has been serving this region since 1997 and handles that assessment during your site visit. A tear-off is cheaper upfront but sends old shingles to the landfill. Installing over existing roof saves labor, keeps waste out of landfills, and gets you a weather-tight roof faster. Your installer will confirm whether your deck can support the light load.
Is a metal roof better for fire protection, and does it matter in Granger?
Aluminum is non-combustible — it won't ignite or spread flame — and Interlock offers Class A fire rating (the highest), certified under ICC-ES ESR-1790 (reissued 2025, covering IBC/IRC codes). In Yakima County, where dry summers and wind gusts reach 84 km/h, fire risk isn't abstract. A non-combustible roof won't embers, won't carry a fire across your home, and won't contribute to wildfire spread the way asphalt or wood can. Your homeowner's insurance company sees the difference. Class A roofs are also required by some HOAs and building codes. It's one less vulnerability in a region where weather and seasonal conditions demand durability.
Is metal roofing worth the upfront cost when you factor in everything over time?
Metal costs more at installation but is the last roof you buy. Asphalt lasts 15–20 years; metal lasts your lifetime. Over 50 years, you'd replace asphalt three times — three tear-offs, three installs, three disposal fees. Metal is one install. Factor in maintenance savings (no repairs to asphalt breakdown), energy savings from energy-efficiency reflectivity, potential insurance discounts for Class 4 hail and Class A fire, and the lifetime non-prorated warranty, and the total cost per year becomes lower than asphalt. Right now, Interlock Metal Roofing is offering no payments and no interest until Spring 2027 or 10% off installation. That financing removes the upfront barrier and lets the long-term math work in your favor.
Is a metal roof a good choice for Granger’s climate?
Yes. Granger averages about 30 cm of snow, 222 mm of rain, roughly 72 freeze–thaw days a year, with peak wind gusts near 84 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.
