Metal Roofing in Walnut Hill, Wisconsin — Lifetime Interlock® Aluminum Shingles Installed Locally
Walnut Hill Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 2001
Metal Roofing Built for Walnut Hill's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing is the trusted metal roofing contractor and local installer for homeowners in Walnut Hill, Wisconsin (Milwaukee County). Founded May 17, 2001, we are the exclusive authorized installer of the Interlock® Lifetime Aluminum Roofing System—engineered for performance, beauty, and durability—and offer roof replacement and re-roofing throughout Walnut Hill. Our heavy-gauge, fire‑resistant, energy‑efficient cool roofs, protected by the Alunar® Coating System and backed by a Lifetime Warranty, are specifically designed for Wisconsin conditions—shedding heavy snow, resisting ice-dam and freeze–thaw damage, and standing up to seasonal storms and high winds. Choose the timeless look of slate, cedar shingle, shake, Mediterranean tile, or standing seam with the long-term protection and strength of metal installed by local Interlock experts in Walnut Hill.

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 ~79 freeze–thaw days a year
Rain & Moisture Proof
Repels ~822 mm of rain a year
- Authorized installer of Interlock® Lifetime Aluminum Roofing Systems serving Walnut Hill homeowners and nearby Milwaukee County residents
- Aluminum coated with the Alunar® Coating System (no visible aluminum surface) for long-term color retention and corrosion and moisture resistance
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Built to shed heavy Wisconsin snowfall — panel geometry and slip-resistant joints help reduce snow loads and limit ice-dam formation during freeze–thaw cycles
- Tested to withstand severe wind events (193+ km/h / 120+ mph) to protect Walnut Hill roofs from summer derecho gusts and tornadic microbursts
- Advanced waterproof installation methods preserve roof integrity through prolonged rain and spring melt periods common to the Great Lakes region
- UL 2218 Class 4 impact resistance for protection against hail, falling branches, and storm debris typical of seasonal Midwest storms
- Class A fire-rated available for homeowners who want enhanced fire performance and ember resistance
- Reflective cool-roof properties reduce attic heat gain during Milwaukee-area summer heat spikes and improve overall thermal comfort
- Solar-compatible roof platform engineered for bracket-mounted photovoltaic systems commonly installed on Walnut Hill residences
- Fully recyclable aluminum construction lowers lifecycle environmental impact and outlasts asphalt shingles in local wet–freeze conditions
- Low-maintenance, corrosion-resistant finish reduces routine repairs for Walnut Hill homeowners facing frequent moisture and freeze–thaw cycles
- Backed by a lifetime-limited transferable warranty to support long-term protection and resale value in Milwaukee County neighborhoods.
- Atmospheric rivers — while rare inland, Interlock’s precision seams and weatherproof installation resist prolonged, multi-day heavy-rain events when slow-moving storm systems occur
- Coastal salt air — not a primary factor for Walnut Hill’s inland location; still, the Alunar® Coating System provides robust corrosion resistance for properties closer to the Lake Michigan shoreline
- Moss and biological growth are minimized by the smooth Alunar finish and steep-shedding panel geometry, lowering cleaning needs after wet seasons
Metal roofing built for Walnut Hill's climate
Averages (10-yr): ~822 mm rain and 88 cm snow per year, ~3128 sunshine hours, mean 9.4°C, typical daily-max winds ~22 km/h with gusts to 96 km/h, and ~79 freeze–thaw days per year.
- 88 cmavg. snow / year
- 822 mmavg. rain / year
- 79freeze–thaw days / year
- 96 km/hpeak wind gusts
- 3128 hrsannual sunshine
- 9.4°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 Industries (Midwest) Inc.
- 2355 Fairview Ave N, Roseville, MN 55113, United States
- Phone 414-348-8870
- Local lines Minnesota 612-800-8686
- Sales & Marketing sales@minnesotametalroofing.com
- Toll-Free 1-866-733-5811
- Customer Service mwservice@interlockroofing.com
- www.WisconsinMetalRoofoing.com
- Also wisconsinmetalroofing.commidwestmetalroofing.com
- License WI #898136
- EPA Lead-Safe Certified Firm #NAT-F224594-2
- Serving Wisconsin since 2001 — 25 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 Wisconsin is a trusted metal roofing contractor proudly serving homeowners and businesses throughout the State of Wisconsin. Backed by decades of manufacturing and installation expertise, 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 Metal Roofing Wisconsin provides exclusive lifetime roofing products engineered to perform in Wisconsin’s demanding climate — from heavy snow loads and ice dams to hailstorms, high winds, freezing temperatures, and dramatic seasonal weather swings. Built on integrity, professionalism, and superior workmanship, Interlock Metal Roofing has completed thousands of successful roofing installations across North America, helping Wisconsin property owners invest in roofing systems that are both beautiful and built to endure. Our team is known for transparent communication, efficient project execution, and meticulous installation standards, supported by industry-leading materials and comprehensive warranty protection. Interlock’s commitment to excellence is reflected in its dedication to safety, ongoing installer training, and strong customer satisfaction throughout the region. With highly trained crews and strict adherence to best practices, we deliver durable, energy-efficient roofing solutions that enhance curb appeal, increase property value, and provide decades of dependable protection against Wisconsin’s harsh winters and severe storm conditions. Whether you need a residential metal roof replacement, a commercial roofing upgrade, or a custom architectural metal roofing system, Interlock Metal Roofing Wisconsin is the 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 Walnut Hill, Wisconsin
Interlock® Aluminum Roofing — all-climates performance specs for Walnut Hill, Wisconsin
| 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 Walnut Hill, Wisconsin:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Wisconsin
Completed Interlock® metal roofs near Walnut Hill, WI
Every marker is a real, anonymized Interlock® aluminum roof completed by a Certified Interlock Installer. Explore verified Interlock® installations near Walnut Hill, Wisconsin, 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 Walnut Hill on the interactive project map →Browse all Interlock® projects in Wisconsin →See more Interlock® projects →
What our customers are saying:
Hello Greg, I just had to drop you a line to tell you how pleased we are with the Interlock Roofing System that was installed last week. I have to admit that as good as I was hoping it would look, it turned out to be so much better than I had even hoped. We couldn’t be prouder of how our house looks now; the new roof is visually stunning. We can now breathe a huge sigh of relief, knowing that we’ll never again have to go out into the yard and pick up the pieces of asphalt shingles that would blow off of the roof after a storm or a high wind day. To boot, the very day after the roof was completed, we had someone who identified himself only as “your nosy neighbor from 10 miles down the road,” who stopped, knocked on our door and started asking questions about the roof. He was shocked to hear that it was a metal roof. He thought that we had installed a slate roof! He was very interested to hear all the facts about the roof, and suddenly I became Interlock Roofing’s most avid salesman. I brought out your business card so that he could take a picture of it with his cell phone, and he said he’d be contacting you soon. I’ve also been talking about the roof with some of the guys at work who had seen the before and after pictures that I brought in, and I’m sure that you will be hearing from some of them in the future too. Now, as much as I couldn’t be happier with contacting you and doing business with you, I have to tell you that even you will have to take a back seat to the super awesome job of your installers, Jesse and his team. To say we were blown away by these guys would be the understatement of the century. They came in like a whirlwind and started doing their thing and made astounding progress in such a short period of time, it blew us away. Jesse himself is such a great face to have attached to your company. He is professional, knowledgeable, and so personable that we knew in an instant that we were in good hands with him and his team. All of his team members were that way, and honestly, the hardest working group of guys that you will ever witness. We expected it to take anywhere from 5 days to a week to get our whole roof done. These guys had it done in 2 days and a couple of hours, and they left no stone unturned in doing the A-1 job that was promised. They even fixed a couple of cosmetic items on our existing siding to boot! What a great bunch of guys. And let me reiterate one more time,…Interlock, as a company, should feel confident and proud to have Jesse and his team representing them. I’m positive you will never find a better team to install your product than them. Again, thank you for the product and the work that you’ve done. You now have not only a very satisfied customer in us, but you also have a couple of very enthusiastic ambassadors for Interlock Roofing Systems.
I have made, and continuously still make, numerous recommendations to family & friends to install a Interlock roof. And, I have produced pictures on demand that I stored on my smart phone. If possible, I would be appreciative if I could get the drone footage that Jesse had taken after the finishing of the installation. I believe it would be a great selling point coming from a true customer to help propel the Interlock name. There are just a couple areas on the roof that the installation crew could have touched-on during the installation, but overall the roof looks simply amazing. Quality certainly displays the professionalism the installers had put into their work. Since the installation of our new roof, we have received numerous compliments from many of our neighbors that walk around our subdivision, plus a handful of neighbors in the adjoining subdivisions. Many questions have been asked with many answers given. We are definitely happy with our new Interlock roof. We have NOT once questioned or second guessed our decision to install an Interlock roof. It is one of the best decisions we have ever made for re-investing in our home...Thank you, Interlock!
I never really thought I could be thrilled about a roof, but I have to tell you; our new Interlock roof is beautiful! It adds true elegance to our home. We know it adds value as well, and the fact that we will never need to re-roof again is a definite advantage. Everyone within our organization, from the initial phone contact to the installation crew, was courteous and pleasant to work with. The install went smoothly and the crew kept the site clean from beginning to end. Everybody we have shown our Interlock roof to has seemed quite impressed also. We would (and in fact have already done so) recommend Interlock Roofing to others.
Excellent roof! Looks good! The installers were courteous and professional. Put the tarp all around the house and kept the site very clean. I was impressed with their super service. They bent over backward to please us. The A-Team of Roofing! When it rains, it is NOT any louder, and we are in a wind zone, and shingles have not blown off, and we have had the roof since 2008. The snow slides off, too! And the salesman knows his product and explains it well. It will add value to the house. Unlike asphalt, that's like tar and paper, and doesn't hold up. The Interlock Lifetime Roof is super durable!d Greg Weber the salesman, knows his product and explains it well. It will add value to the house. Unlike asphalt, that’s like tar and paper and doesn’t hold up. The Interlock Lifetime Roof is super durable!
We purchased our roof in 2009 and as you can see from the pictures taken in May of 2017, our roof looks as new as the day we bought it. Here are the things we have noticed most about our Interlock Lifetime Roof over the last 8 years. It keeps our house much cooler in the summer than the asphalt roof we used to have. It really sheds snow, and the snow guards work great. We never need to use a snow rake. We love the durability and the curb appeal. Greg Weber our representative, who we were enthused to learn, is still with the company. When we saw him in 2009 he laid out all the variables in a professional way and our Interlock Roof has lived up to all of our expectations and promises he made. All companies promise results, service, and quality. Interlock delivers.
The installation was super smooth. Every installer was courteous and professional. We get lots of compliments, and people stop by all the time to admire it. One of the biggest misconceptions about metal roofing is people think it’s loud. Our Interlock roof is very silent. The only way I know if it’s raining is if I look out a window. Also, the snow just slides off. We are also in a wind tunnel area, and we have never lost an Interlock shingle, and we have had the roof for many years. We were so pleased with our Interlock roof that we put the same roof on our lake home in northern Wisconsin. We get a lot more snow up there and the Interlock’s snow-shedding performance capabilities are second to none on that roof, too!
I love the roof! It looks great, and the squirrels that we’re crawling all over my old asphalt roof slide right off it. The snow slides off, too. I hope to get some $500 referrals. The crew was terrific, hardworking, courteous, polite, and clean.
Drip, drip, drip. This is not a sound you want to hear at 3:30 am… in bed… coming from your attic… in the dead of winter. A quick peek in the attic confirmed my worst fears, the ice dam on the roof was allowing melted water to seep through the crappy asphalt shingles and into the house. We called a local contractor and had the ice dam removed, but this didn’t fix the underlying problem that our current roof was cheap and damaged. My wife and I moved into a beautiful three-story brick Tudor on Madison’s near west side in the fall of 06′. It was perfect in that it had been beautifully remodeled with gorgeous woodwork, marble, and stunning attention to detail, with the exception of the roof. We had decided that, barring any unforeseen circumstances, this was the house we were going to stay in until retirement, so why not invest in a metal roof. After a couple of weeks of research and interviewing, we settled on Interlock. Part of the choice was made on the quality of the product, and part was made on the salesmanship of the rep, Chuck. Work started and except for some problems with the weather, things progressed smoothly. We were especially impressed with the steps the crew took in regard to safety, and our stay-at-home neighbor told us about how exciting the crew was, “you’re definitely getting your money's worth,” was her exact quote. At the end of the job, the crew even emptied all the trash we had pulled out of the attic for us. Now that’s service! After everything is said and done, we’ve been able to cap off our gorgeous house with an equally gorgeous roof.
I had Interlock put on a beautiful red slate roof 17 years ago.The roof still looks beautiful. 5 years ago, I had them also re-roof my garage with the same type of slate. The roofs look gorgeous and I have no maintenance whatsoever.I get complements all the time. The guy whom I contracted with was named "Tim' but has since died. He was a really nice guy. Back in 2009, the roof was much cheaper. ( I actually paid more for the garage 5 years ago!) I am extremely happy with the roofs. The guys did a wonderful job, replacing rotted boards where necessary. They also told me about very cheap gutters I could buy at Menards instead of those ridiculously - priced "special" gutter systems. I bought them and they placed them on my buildings.This home will go to my daughter one day; I do not want her to have to lift a finger. Note that I had an asphalt roof previously. It lasted only 12 years. The shingles curled up under the sun and cracked. They looked terrible. I can honestly say that these metals roofs by Interlock are very much worth what you pay for them. They will last a lifetime with almost no maintenance. Instead of replacing a roof every 15 years and paying lots for asphalt or fiberglass, their metal roofs last very long and you will never have to re- roof again.
Dear Interlock Lifetime Roofing Systems: We purchased our Interlock Lifetime Roof in June 2014. We are very happy with the look, durability of the material, and finish. After a snowfall, the heat of the sun will warm the roof and allow the snow to shed from the roof. We have a great sense of security, knowing it can withstand higher winds than conventional asphalt. In fact, our neighbors lost many shingles in the last major wind storm, and our Interlock roof proved to be the high wind resistance product it is with all shingles intact. We love the fact it’s more reliable and has peace of mind knowing it has lots of longevity and will look brand new not only now but down the road. We also received a discount on our homeowner’s insurance. Overall, we were very satisfied with our sales representative Greg Weber, the company, the service, and the product.
In March 2017 we had an Interlock Lifetime Roof installed. Greg Weber, the salesman, was not pushy. We were very impressed with his salesmanship and the product. He also offered to have the Interlock product put on our wishing well in the front yard. That was something we really appreciated. The clean-up was excellent! Many neighbors and people who " data-wpil-keyword-link="linked">walk by the house have noticed the roof and asked a lot of questions. We have gotten lots of compliments!
The Interlock crew was able to take some extra time to coordinate with another contractor for solar installation. As a result, the final the result looks great and very functional. The materials used are very high quality, and they worked efficiently and cleaned up when finished.
Nearby service areas in Milwaukee County
Interlock® metal roofing is also installed in these communities near Walnut Hill:
Interlock Industries (Midwest) Inc. also services nearby States
Beyond Walnut Hill, our team installs Interlock® metal roofing across:
Metal Roofing FAQs for Homeowners in Walnut Hill
The following metal roofing FAQs are designed specifically for homeowners in Walnut Hill, Wisconsin. 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 Walnut Hill.
How does a metal roof handle Walnut Hill's snow and ice buildup?
Interlock's four-way interlocking aluminum panels shed snow and ice efficiently because the smooth surface prevents adhesion that causes ice dams on asphalt roofs. With about 88 cm of snow falling annually in Milwaukee County and roughly 79 freeze-thaw cycles per year, this matters: your roof won't trap moisture that refreezes and backs up into the attic. The panels' light weight—the Slate profile at just 0.41 lb/sq ft—means no structural load concern even when snow sits temporarily. Optional snow guards can be installed if you prefer controlled release rather than complete shedding.
Will freeze-thaw cycles in Wisconsin crack or damage an aluminum metal roof?
No. Aluminum expands and contracts with temperature swings, but it does so uniformly and predictably—it won't crack, curl, or split like asphalt, wood, or concrete tile. Walnut Hill sits in a climate with about 79 annual freeze-thaw days and mean temperatures around 9.4°C, making material stability critical. Interlock's roofing-grade 3105-H24 aluminum alloy (ASTM B209) is engineered to handle this cycling indefinitely. The Guardian Warranty explicitly covers cracking and curling for the original owner's lifetime, then transfers 50 years to the next owner—proof the material stands up to Wisconsin's extremes.
Can aluminum metal roofing rust in a climate with Wisconsin's rainfall and humidity?
Aluminum cannot rust because it contains no iron; instead, it develops a microscopically thin, self-healing oxide layer that protects the metal underneath. When scratched or abraded—by branches, ladders, or hail—the oxide immediately reforms. Walnut Hill receives about 822 mm of annual rainfall and variable humidity, conditions that would accelerate rust on steel roofing within years. Add the Alunar 70% PVDF fluorocarbon finish (applied to both sides, warranted 30 years against chalking and fading per ASTM D4214) and you get a roof that resists corrosion longer than the house itself. The Guardian Warranty covers rusting for the original owner's lifetime.
Are metal roofing panels secure in Walnut Hill's wind gusts?
Completely. Interlock panels are warranted to resist wind speeds up to 120 mph when installed to specification—well above typical conditions here. Local data shows mean winds around 22 km/h with gusts to 96 km/h; the warranty covers you with a 56 mph safety margin. The four-way interlocking system locks each panel to its neighbors, distributing wind load across the entire roof rather than stressing individual fasteners. This is why the system holds an ICC-ES evaluation report (ESR-1790, reissued 2025) under IBC/IRC codes. If a major storm hits, you're protected by design, not luck.
Does Interlock metal roofing qualify for hail damage coverage or insurance discounts?
Yes. Interlock achieves UL 2218 Class 4 impact rating—the highest available—meaning it resists damage from hailstones up to 1.5 inches. Many insurers recognize this and offer premium reductions on homes with Class 4 roofing. Ask your agent for a quote; provide the UL listing number (Intertek 33876) and the Guardian Warranty details. In Walnut Hill's climate with variable spring weather and about 3,128 annual sunshine hours interspersed with storms, a roof that stops hail damage before it starts saves thousands in repairs and hassle. The warranty covers perforation from large hail as part of the lifetime limited material coverage.
Can my house handle a metal roof, or do I need to reinforce the structure?
No structural reinforcement needed. Interlock's lightweight aluminum—the Mediterranean Tile profile weighs about 0.59 lb/sq ft, roughly 96% lighter than concrete or clay tile—installs easily over most existing roofs without engineering work. For comparison, a typical asphalt roof weighs 2–3 lb/sq ft; Interlock's heavier profiles still stay under 0.6 lb/sq ft. This is especially valuable in Walnut Hill's climate where you might otherwise choose tile for durability but avoid it due to structural cost. Installing over your existing roof also eliminates the tear-off, labor, and landfill waste. Your home's framing, built to handle snow loads of about 88 cm annually, handles Interlock with no upgrades.
What maintenance does an Interlock metal roof require compared to asphalt or tile?
Virtually none. Asphalt roofs need annual inspection, moss/algae treatment (especially in damp climates), and seal-coating every few years. Concrete tile requires resealing, crack repair, and broken-piece replacement. Interlock needs only occasional gutter cleaning and debris removal—the same as any roof. The Alunar 70% PVDF finish resists chalking and fading for 30 years, so no repainting. In Walnut Hill's 822 mm annual rainfall and 79 freeze-thaw days, asphalt's granules wash away and it becomes brittle; Interlock's aluminum stays inert. The Guardian Warranty is non-prorated for the original owner's lifetime, meaning you're not paying for repairs—the material simply outlasts the maintenance schedule.
Does an aluminum metal roof help cool my home in summer?
Yes. Interlock's energy-efficient colors feature thermal emissivity up to 0.84 and initial solar reflectance up to 0.55 (Aged Copper Penny profile), meaning they bounce heat away rather than absorb it the way dark asphalt does. The Cool Roof Rating Council rates these finishes—they're engineered to reflect rather than trap solar energy. Over 3,128 annual sunshine hours in Walnut Hill, this difference compounds month to month. You won't eliminate air-conditioning costs, but modeling shows 5–15% cooling savings depending on color and your insulation. In summer, the reflective surface stays cooler to the touch, extending the coating's life and reducing thermal stress on fasteners.
Is metal roofing expensive compared to asphalt over the life of the roof?
Upfront, yes—metal costs 2–3 times more than asphalt installed. Over the roof's life, the economics flip. Asphalt typically lasts 15–25 years in climates like Walnut Hill's with 79 annual freeze-thaw cycles; you'll replace it twice while Interlock's Guardian Warranty covers the original owner for life. Factor in asphalt's maintenance (moss treatment, seal-coating, repairs), tear-off labor and landfill fees for two replacements, versus Interlock's zero maintenance and one installation, and metal becomes the cheaper option by year 30. Add the one-time 50-year transferable warranty to the next owner, and you're buying financial security. For a $300k house, this durability difference justifies the premium.
How long does installation take, and can Interlock install over my existing roof?
Installation typically takes 3–5 days depending on roof size and complexity—much faster than tear-off jobs. Yes, Interlock installs over most existing asphalt roofs without removal because the panels are so light (Slate at 0.41 lb/sq ft). Interlock Metal Roofing, serving this region since 2001, will inspect your deck during the estimate to confirm. Installing over the old roof saves weeks of labor, eliminates disposal costs and landfill waste, and lets you stay in your home without disruption. The existing roof becomes an extra insulation and sound layer—many homeowners are surprised metal roofs are quiet in rain when there's a solid deck and underlayment underneath. Get a site visit to confirm your specific roof is suitable.
Is a metal roof a good choice for Walnut Hill’s climate?
Yes. Walnut Hill averages about 88 cm of snow, 822 mm of rain, roughly 79 freeze–thaw days a year, with peak wind gusts near 96 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.













