Metal Roofing in Sullivan’s Gulch, Oregon — Lifetime Interlock® Aluminum Shingles Installed Locally
Sullivan’s Gulch Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1997
Metal Roofing Built for Sullivan’s Gulch's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (PNW) Inc. is the trusted local metal roofing contractor and exclusive authorized installer of Interlock® Lifetime Aluminum Roofing Systems in Sullivan’s Gulch, Oregon. Since 1997, we have helped homeowners in Sullivan’s Gulch protect their homes from the Pacific Northwest’s heavy rain, wind, and occasional snow with our industry-leading metal roofs. Our Interlock Lifetime Roofing System is engineered for the region’s unique climate—offering superior fire resistance, energy efficiency, and exceptional snow-shedding capabilities that traditional roofing materials can’t match. Whether you prefer the classic look of slate, cedar shingles, shake, Mediterranean tile, or modern standing seam, our heavy-gauge aluminum roofs deliver unmatched durability and curb appeal. Every installation is protected by the advanced Alunar® Coating System and backed by a Lifetime Warranty, ensuring your Sullivan’s Gulch home stays beautiful and secure for decades to come. Choose Interlock Metal Roofing (PNW) Inc. for reliable roof replacement and re-roofing services designed for lasting performance in Oregon’s challenging weather.

Performance you can measure (all climates)
Weather Resistant
Tested to 193+ km/h (120 mph) winds
Durable
Lifetime-Limited, transferable warranty
Energy Efficient
Reflective cool-roof lowers cooling costs
Rain & Moisture Proof
Repels ~1468 mm of rain a year
Corrosion Resistant
Aluminum won’t rust or corrode
- Authorized Interlock® installer serving Sullivan’s Gulch and Multnomah County homeowners for professional system design and local code familiarity
- Designed for Sullivan’s Gulch microclimate—long wet seasons, seasonal freeze–thaw cycles, occasional snow and wind events in Portland’s NE neighborhoods
- Atmospheric rivers: precision system details help manage intense, prolonged rainfall events that affect Sullivan’s Gulch drainage and roof run-off patterns
- 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 minimize corrosion and preserve finish in damp urban environments
- Coastal salt air: Sullivan’s Gulch is inland and not subject to marine salt exposure, yet Alunar® coating still resists corrosion from road salts, airborne pollutants, and moisture
- Moss-control performance: low-porosity Alunar® finish and smooth panel profiles reduce moss and lichen adhesion common on damp roofs in this part of Multnomah County
- Snow-shedding metal panels reduce buildup and help prevent ice dams during occasional freeze–thaw cycles on Sullivan’s Gulch roofs
- Tested to 193+ km/h (120+ mph) for severe wind performance to withstand Portland-area windstorms and gusts that channel through urban canyons
- Advanced waterproof installation methods provide long-term leak protection through Sullivan’s Gulch’s heavy-rain months and wind-driven storm events
- Class A fire-rated available for enhanced ember resistance and added peace of mind during regional wildfire smoke and ember-risk periods
- UL 2218 Class 4 impact resistance for protection against hail, falling branches, and storm debris common in mature-tree neighborhoods
- Energy-efficient cool-roof characteristics lower rooftop temperatures during summer heat waves and improve attic comfort in tight urban homes
- Solar-compatible roofing engineered for bracket-mounted photovoltaic systems to maximize roof-mounted array placement in Sullivan’s Gulch
- Fully recyclable aluminum construction supports sustainability goals and reduces long-term roof replacement waste in Multnomah County
- Backed by a Lifetime‑Limited transferable warranty to protect resale value and long-term ownership for Sullivan’s Gulch homeowners
Metal roofing built for Sullivan’s Gulch's climate
Averages (10-yr): ~1468 mm rain and 48 cm snow per year, ~2957 sunshine hours, mean 11.5°C, typical daily-max winds ~15 km/h with gusts to 116 km/h, and ~36 freeze–thaw days per year.
- 48 cmavg. snow / year
- 1468 mmavg. rain / year
- 36freeze–thaw days / year
- 116 km/hpeak wind gusts
- 2957 hrsannual sunshine
- 11.5°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.
- 1355 NW Everett St, Portland, OR 97209, United States
- Phone 503-966-2948
- Local lines Salem 971-232-4420 · Eugene 541-800-1863
- Sales & Marketing sales@oregonmetalroofing.com
- Toll-Free 1-866-733-5811
- Customer Service pnwservice@interlockroofing.com
- www.OregonMetalRoofing.com
- Also salemmetalroofing.comeugenemetalroofing.comoregoncoastroofing.com
- License OR #130826
- Serving Oregon 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
- SaturdayClosed
- SundayClosed
Interlock Metal Roofing (PNW) Inc. – Oregon is a trusted metal roofing contractor proudly serving homeowners and businesses across Oregon. With decades of proven roofing experience, Interlock has earned a reputation for exceptional craftsmanship, long-term reliability, and outstanding customer care. As a specialized installer of premium aluminum and standing seam metal roofing systems, Interlock is the exclusive authorized installer of Interlock® lifetime roofing products engineered to perform in Oregon’s diverse climate — from coastal rain and wind to mountain snow and high-desert heat. Built on integrity, professionalism, and superior workmanship, Interlock Metal Roofing (PNW) Inc. has completed thousands of successful roofing installations throughout the region, helping Oregon property owners invest in roofs that are both beautiful and built to last. Our team is known for transparent communication, efficient project execution, and meticulous installation standards, supported by industry-leading materials and strong warranty protection. Interlock’s commitment to excellence is reflected in its dedication to safety, ongoing installer training, and recognition through regional industry awards and customer satisfaction accolades. With highly trained crews and strict adherence to best practices, we deliver durable, energy-efficient roofing solutions that enhance home value and protect against the elements for decades. Whether you need a residential metal roof replacement, a commercial roofing upgrade, or a custom architectural metal roofing system, Interlock Metal Roofing (PNW) Inc. is Oregon’s trusted choice for premium lifetime metal roofing — combining proven expertise, exclusive products, and service you can count on.
Recognition GuildQuality Guildmaster Award — verified customer satisfaction (GuildQuality)
Accredited BBB Accredited A+
Get a Free Metal Roof Estimate in Sullivan’s Gulch, Oregon
Interlock® Aluminum Roofing — all-climates performance specs for Sullivan’s Gulch, Oregon
| 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 Sullivan’s Gulch, Oregon:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
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Completed Interlock® metal roofs near Sullivan’s Gulch, OR
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Sullivan’s Gulch, Oregon, 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 Sullivan’s Gulch on the interactive project map →Browse all Interlock® projects in Oregon →See more Interlock® projects →
What our customers are saying:
We had a gorgeous Red Shingle Interlock roof installed and it had completely changed the look of our house! This roof was a long time coming…we placed the order in September 2021 and knew there was a 6mo wait but we were determined to wait it out and it was so worth it!The crew worked so fast and efficiently and really did a fantastic job. They were also super clean and made a great effort to leave no mess behind and even took care not to crush my plants.This is an expensive roof, make no bones about it, but the quality and durability as well as the beautiful look all are worth it.My house has had so many complements since it was done and compared to my neighbor next door who had a roof put on a couple months ago with traditional shingles, it is clear my roof is the favorite of the block!! Positive Responsiveness, Punctuality, Quality, Professionalism, Value Services Attic venting, Attic venting repairs, Roof installation
Interlock roofing is a fantastic company and the representative, Damon, was incredible. Always there to answer questions in a quick timely manner. I couldn’t be happier. This Aluminum roof will never need to be replaced and it makes my simple home look like a million dollar home. It’s stunning. I chose black slate and it is so beautiful. Such peace of mind too. I would highly recommend this company and its employees. The installation crew were professional and careful and accommodating. Thank You Damon and Interlock Roofing. Positive Responsiveness, Punctuality, Quality, Professionalism, ValueServices, Attic venting, Roof installation
We had decided that we were ready to invest in a metal roof in our "forever home" for, among other reasons, its durability, eco-friendlly recyclable materials and light weight for seismic concerns. Damon was punctual and professional and an excellent salesperson. We had a very positive experience with May regarding scheduling; she was able to accommodate our timeframe and the crew showed up earlier than anticipated. The workmen were professional and very fast, and completed the tear-off and roof installation in 2.5 days. We were very impressed. The new roof is extremely attractive, and provided the whole house with the equivalent of a much needed "facelift!" We are delighted with our new roof and enjoy it every time we step away from the house to admire it. More thorough clean up, using magnetic tools to discover razors, nails and staples from tearoff. Better, more complete tarping to catch debris, not only on the slant side of the roof, but also the gable sides that are not slanted. They were not tarped, and that is where most of the debris and nails were found. An assessment for lead paint BEFORE working, which was promised, but not done. A smaller Interlock sign, in less garish (ie not fluorescent) colors, to display that would be acceptable for Washington County and the laws of other areas. I am not sure if the cardboard, water bottles and metal was separated and recycled off site, because it was all tossed into the same dumpster, but I would hope that since Interlock prides itself on eco-friendly recyclable materials, that it would follow through with recycling paper and metal as well. Roof, material, workmanship: 5 stars, Areas for improvement: Testing for lead pre-install, Tarping for Debris catch and Cleanup: Improvement needed, Communication re: Cleanup: Improvement needed, Information re: payment (cash, no credit card, upon completion): Improvement needed
We are very pleased with our new Interlock roof. While our house is nearly 100 years old, the new roof fits perfectly with the style and enhances the look of our home. We began receiving compliments from our neighbors almost immediately. Michael Laduke and his crew were professional and courteous, keeping the surrounding yard clean of debris and closing the gates each day to prevent our dog from escaping. Although the crew was slightly delayed due to an unfortunate encounter with a deer on the road, the work was completed just before the Thanksgiving holiday, adding the health and well-being of the crew and the beauty and protection of a new roof to our list of things to be thankful for. We greatly appreciate Mr. Laduke’s commitment to detail and his personal assurance that the project was completed before the holiday weekend. We would most certainly recommend Interlock Roofing Systems to anyone considering roof replacement.
Interlock Roofing installed an excellent metal roof on our house. It looks amazing and will last for years! The installer, Victor, was very professional and did a great job. He explained the work being done and even replaced a worn board on the garage. This product is definitely worth every penny! Positive Responsiveness, Punctuality, Quality, Professionalism, Value Services Attic venting, Roof inspection, Roof installation
Beautiful roof, replaced 44-year-old concrete tile. Installers showed up when scheduled, were conscientious and knowledgeable. They were hardworking, even in difficult cold weather. Communication was challenging while waiting our turn, but this was addressed. Ten stars for all of you!PositiveResponsiveness, Punctuality, Quality, Professionalism, ValueServicesRoof installation
Interlock Roofing installed a metal roof on our family home and it looks amazing. It has held up to extremely high rainfall so far. The crew that installed my roof was very professional and polite. I would recommend Interlock Roofing if you are in the market for a new roof.PositiveResponsiveness, Punctuality, Quality, Professionalism
It has now been nearly six months since our Interlock roof installation, and we couldn't be happier with it. We debated getting a metal roof due to the greater upfront costs relative to a standard composite roof, but we're not planning on going anywhere anytime soon, so the peace-of-mind of a lifetime roof -- knowing we won't have to do this again, and that the company stands behind the product the way they do -- makes it worthwhile. The installation crew was professional, and their customer service has been responsive when needed. Neighbors have commented too on how good our roof looks! Recommended! Positive Responsiveness, Quality, Professionalism Services Roof installation
At the recommendation of a neighbor, we chose Interlock Roofing and we couldn’t be happier. We’ve been homeowners for 40+ years and fortunately have never had to worry about a roof, as our houses were new, and we moved somewhat frequently. Then two years ago we bought a second home on the Oregon Coast and knew we would have to replace the roof within a few years. Until finding out about Interlock, I fretted about having it replaced. So, after having our second home’s roof replaced, I asked Damon to inspect our main, 16-year old house in Portland. He thought it had anywhere from 2 to 5 years life in it, but we opted to have it replaced for three reasons. First, why wait for a leak, second, because the warranty is going to outlive me and finally…it will never be cheaper. The roof is absolutely beautiful and is the envy of the neighborhood. Dealing with Interlock has been such a pleasure on ALL fronts. The communication throughout the process was flawless. They did everything and more that was promised. Very few products and services have ever impressed me more. ">" alt="Interlock Aluminum Shake Roof - Portland, Oregon USA" width="1500" height="1124" />
We are thrilled with the quality and look of the roof! The installers are true craftsmen of their trade and were so polite and courteous. Nothing negative to say. The sales rep that came to our home was sure a top notch sales rep for your company. Mike Rasmussen was very impressive with his knowledge and ability to make you understand. We had four estimates prior to Interlock roofing and had pretty much made a decision prior to Mike coming to our home. I was going to cancel the appoitment with Mike but felt it would be rude to do so on the same day so we kept the appoitment. So glad we did !!! Mike did an amazing job at showing all the advantages of Interlock roofing compared to ordinary roofing. Best decision we could have made for our home and ourselves! Now comes the only part we were not pleased with and feel you could greatly improve. We were promised a start date of absolutely no later then Sept. 14th. No materials had been delivered or no communication from Interlock had occured and it was Sept. 12th. I made a phone call and was informed the roofing material had not been delivered yet and the new start date would be Sept. 21st. Why we had not been kept in the loop on that I am not sure. The morning of the 21st I receive a phone call from Roland Stark saying an employee called in sick and they would be starting the next day on Tuesday the 22nd. Tuesday the 22nd I receive a phone call from Roland Stark that the employee called in sick again and they will begin the next day Wed. the 23rd. I questioned why you could not begin the tear off without him and was told he was the lead guy. During the sales process we were informed that all of your installers have been with you for many years. I believe Mike said at least 14 years. But I could be wrong on that. Maybe he said 13 years. I was confused why tear off could not begin with that kind of experience. Roland said at the latest they would start Friday and his crew promised they would work Sat. and Sunday both to complete the job. We were promised job completion Sunday the 27th at the latest. Sat. the 26th is the actual day the men showed up to begin on the roof. The men showed up prompt and begun work immediately. Very professional and hard working. I was impressed. As they wrapped up for the evening to leave I said, " See you tomorrow." They looked a little confused and replied, " We will be back on Monday as we have worked all week and are going home to see our wives and kids." Completely understandable except Roland told us they had been home sick all week. Official finish date was Sept. 30th. Roland needs to be more honest and upfront about the scheduling. It was very frustrating and was the only negative thing about the whole experience. We had Leaf Filter gutters and also Lifetime Exteriors(new siding) both scheduled to begin work the day following the roof project. Each time Roland promised a new date these two businesses had to be contacted and they would re-schedule their crews. Very frustrating for both us and them.You requested where Interlock could have improved, therefore I gave you an honest answer. But I am keeping that between your company and us. The negative scheduling part that is. When asked how we like our new roof we respond with," Best decision we ever made for our home. We love it and could not be happier!!!! If we had it to do over again we would certainly choose Interlock Roofing." Have NO REGRETS. LOVE the roof.
We’ve had our roof for about 7 years and have been very pleased with it. Recently, I scheduled gutter cleaning which was complicated by a run of wet weather which makes the roof very slippery. The gutter contractor asked if we had ever considered installing safety anchors. I didn’t know there was such a thing. I called Interlock and Ivan came by to take a look. He quickly determined appropriate locations for the anchors that the gutter cleaners could clip their safety harnesses to and showed me an example of the anchor itself. He also offered to paint them black to make them more inconspicuous on our dark roof. He returned about a week later for the install and afterwards showed us pictures of the anchors from the roof and pointed them out from the ground. Overall very professional, prompt, excellent service.
We love our roof! Interlock was wonderful to work with. Very knowledgable and helpful throughout the whole process. The team that installed were amazing and did amazing work. They cleaned up everything in a timely manner. One feedback I would have is giving more updates on when the project was slated to be started, originally was schedule during our vacation and we didn't know til a few days before we left. Overall we are very please and cant wait to never change our roof again!
Nearby service areas in Multnomah County
Interlock® metal roofing is also installed in these communities near Sullivan’s Gulch:
Interlock Metal Roofing (PNW) Inc. also services nearby States
Beyond Sullivan’s Gulch, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Sullivan’s Gulch
The following metal roofing FAQs are designed specifically for homeowners in Sullivan’s Gulch, Oregon. 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 Sullivan’s Gulch.
Does a metal roof handle Sullivan's Gulch snow and ice buildup?
Yes — aluminum's smooth surface sheds snow and ice far better than asphalt, and the four-way interlocking panels lock together so no seams separate under freeze-thaw stress. Sullivan's Gulch averages about 48 cm of snow annually and roughly 36 freeze-thaw cycles per year, which cause traditional roofing to crack and curl. Interlock's non-porous aluminum oxide layer won't absorb moisture that expands when frozen, so ice dams form less readily and your roof survives the winter-spring cycle unchanged. Panels can be fitted with snow guards if you prefer controlled shedding.
With 1,500 mm of rain per year, will a metal roof leak in Sullivan's Gulch?
Metal roofs are actually superior in heavy rainfall when installed correctly. Sullivan's Gulch receives about 1,468 mm annually — well above the national average — and the four-way interlocking design means water is mechanically directed downslope with no exposed fasteners. The panels overlap in all directions, so water cannot bypass the seams even during the region's occasional winddriven storms. Installation over a solid deck with underlayment creates a secondary water barrier. Proper pitch and profile selection (our Slate, Cedar Shingle, and Shake profiles all shed water aggressively) ensure long-term leak protection.
Why does aluminum roofing outperform steel in wet Oregon climates?
Aluminum cannot rust because it contains no iron — the element that oxidizes and creates rust stains on steel roofing. Instead, aluminum naturally forms a protective oxide layer that self-heals when scratched or exposed. Interlock uses roofing-grade 3105-H24 and 3003-H24 aluminum alloy (ASTM B209) coated on both sides with Alunar 70% PVDF fluorocarbon finish, warranted 30 years against chalking and fading. In Sullivan's Gulch's coastal-influenced Multnomah County climate with high rainfall and occasional freeze cycles, this dual-sided coating protects against moisture exposure far more effectively than single-coated steel or uncoated aluminum.
Does hail damage metal roofing, and can I save money on insurance?
Interlock metal roofing carries a UL 2218 Class 4 impact rating — the highest available — and the Guardian Warranty even covers perforation from hailstones up to 1.5 inches. This extreme durability often qualifies homeowners for insurance discounts; contact your carrier with the UL listing and warranty details. While Sullivan's Gulch isn't a high-hail zone, the region's occasional severe weather and wind gusts reaching 116 km/h mean impact resistance directly protects your investment. Unlike asphalt shingles, which crack and bruise easily, aluminum's hardness and flex prevent damage that typically leads to claims and premium increases.
Is metal roofing safe in Sullivan's Gulch's wind conditions?
Yes — Interlock's four-way interlocking panels are warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. Sullivan's Gulch experiences typical daily-max winds around 15 km/h with occasional gusts to 116 km/h, well within this warranty range. The interlocking design means each panel is mechanically secured to its neighbors in four directions, so individual panels cannot lift or separate even in extreme conditions. This is fundamentally different from overlapped shingles, which rely on nails and adhesive alone. The ICC-ES ESR-1790 evaluation confirms compliance with IBC/IRC wind requirements.
Does a metal roof shaped like tile or slate need roof reinforcement?
No structural reinforcement is needed because Interlock's aluminum is extraordinarily light. The Mediterranean Tile profile weighs about 0.59 lb/sq ft — roughly 96% lighter than concrete or clay tile — and installs directly over your existing roof without additional framing or bracing. The Slate profile is even lighter at about 0.41 lb/sq ft. This weight advantage matters in Sullivan's Gulch because it means you avoid expensive structural upgrades and can often re-roof without tearing off existing shingles. Compare this to real slate or tile, which demand engineering review and sometimes costly reinforcement — Interlock delivers the aesthetic without the construction burden.
Is metal roofing worth the upfront cost compared to asphalt over 30 years?
Metal roofing is the last roof you buy, which makes the per-year cost lower than asphalt despite higher upfront expense. Asphalt typically lasts 15–20 years in Sullivan's Gulch's rainy, freeze-thaw climate and requires professional replacement twice in a 30-year period. Interlock's Guardian Warranty is lifetime limited, non-prorated for the original owner, then transferable to the next owner for 50 years total — meaning no replacement, no tear-off labor, no landfill fees. Factor in energy savings from energy-efficient colors (up to 0.55 initial solar reflectance), zero maintenance, and the resale value boost, and the math strongly favors metal. Current financing offers 10% off or no payments and no interest until Spring 2027.
Can an aluminum roof keep my house cooler in summer?
energy-efficient Interlock colors are engineered to reflect heat rather than absorb it. The thermal emissivity rating of 0.84 and initial solar reflectance up to 0.55 (Aged Copper Penny color) mean less solar heat reaches your attic — directly lowering cooling costs during Sullivan's Gulch's approximately 2,957 annual sunshine hours. The Cool Roof Rating Council rating confirms this performance. While Sullivan's Gulch is not a hot-climate zone, the city's substantial sunshine combined with cool nights means a reflective metal roof reduces spring and early-fall cooling loads without sacrificing aesthetics. Darker profiles are available if you prefer traditional appearance, with reflectance data provided for each color.
What upkeep does a metal roof need in Oregon?
Virtually none compared to asphalt, wood, or tile. Asphalt requires regular inspection for granule loss and algae, wood shakes demand preventive treatment and nail replacement, and clay tile needs regrouting and broken-piece repairs. Interlock aluminum requires no preventive maintenance, sealant reapplication, or tear-off when it ages. The ICC-ES ESR-1790 evaluation verifies CALGreen-compliance for reduced maintenance, and the non-porous Alunar 70% PVDF coating (warranted 30 years) resists salt air and rain exposure without degradation. In Sullivan's Gulch's 1,468 mm annual rainfall environment, this low-maintenance durability is especially valuable — your roof works for decades without drains on your time or budget.
How long does installation take, and can you roof over my existing shingles?
Installation typically takes 3–7 days depending on roof size and complexity, handled by Interlock Metal Roofing (PNW) Inc., serving Sullivan's Gulch and the region since 1997. One of metal roofing's key advantages is that Interlock panels install directly over existing asphalt, wood, or tile — no tear-off required. This saves weeks of labor, eliminates disposal costs, and gets you under protection faster. A solid deck and underlayment ensure proper water shedding; our installers assess your current roof and make recommendations during the free consultation. The lightweight aluminum (Slate at ~0.41 lb/sq ft) means no structural stress, so re-roofing becomes a straightforward application rather than a major construction project.
Is a metal roof a good choice for Sullivan’s Gulch’s climate?
Yes. Sullivan’s Gulch averages about 48 cm of snow, 1468 mm of rain, roughly 36 freeze–thaw days a year, with peak wind gusts near 116 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.





