Metal Roofing in Millarville, Alberta — Lifetime Interlock® Aluminum Shingles Installed Locally

Millarville Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1999

Metal Roofing Built for Millarville's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection

Interlock Metal Roofing (Alberta) Ltd., founded February 5, 1999, is a trusted metal roofing contractor and local installer serving homeowners in Millarville, Alberta, and the surrounding foothills. As the exclusive authorized installer of Interlock® Lifetime Aluminum Roofing Systems, we provide roof replacement and re-roofing services that combine heavy-gauge, fire-resistant, energy-efficient cool-roof performance with long-term durability. Engineered to shed heavy prairie and foothills snow, withstand freeze–thaw cycles and hail, reflect summer heat to reduce cooling loads, and offer added protection during wildfire-prone seasons, the Interlock Lifetime Roofing System delivers proven performance for Alberta’s varied climate. Choose the timeless look of slate, cedar shingles, shake, Mediterranean tile, or standing seam with the strength of metal—each roof is protected by the Alunar® Coating System and backed by a Lifetime Warranty for Millarville homes.

Interlock metal roofing styles including slate, cedar, shake, tile, and standing seam in Millarville, Alberta

Performance you can measure (all climates)

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

Weather Resistant

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

Interlock® aluminum metal roof in Millarville, Alberta backed by a Lifetime-Limited, transferable warranty

Durable

Lifetime-Limited, transferable warranty

Energy-efficient cool-roof Interlock® aluminum metal roofing in Millarville, Alberta

Energy Efficient

Reflective cool-roof lowers cooling costs

Freeze–thaw durable Interlock® metal roof for Millarville, Alberta

Freeze–Thaw Durable

Endures ~126 freeze–thaw days a year

UL 2218 Class 4 impact- and hail-resistant Interlock® metal roof in Millarville, Alberta

Impact Resistant

UL 2218 Class 4 — top hail rating

Snow-shedding Interlock® metal roof built for Millarville, Alberta winters

Snow-Shedding

Built for ~113 cm of snow a year

  • Proudly manufactured in Canada by a family‑owned company and offered to homeowners in Millarville and the Metro Calgary area
  • Authorized Interlock® Lifetime Aluminum Roofing Systems installer serving Millarville properties and nearby communities
  • 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 coated with the Alunar® Coating System (no visible aluminum surface) for a uniform, corrosion‑resistant finish tailored to Alberta conditions
  • Engineered to withstand heavy snow loads and repeated freeze–thaw cycles typical of Millarville’s foothill climate
  • Snow‑shedding panel geometry reduces accumulation and lowers ice‑dam risk on Millarville roofs with steep and moderate slopes
  • Field‑tested to resist 193+ km/h wind forces, addressing Chinook gusts and windstorms that can impact Millarville and the Metro Calgary corridor
  • Interlocking seams and mechanical fastenings preserve seal integrity through rapid temperature swings and multiple freeze–thaw cycles
  • Class A fire‑rated available and specified for ember resistance where seasonal grassland or forest fire risk exists around Millarville properties
  • UL 2218 Class 4 impact resistance to protect against hail, falling branches and storm debris common to southern Alberta storms
  • Cool‑roof performance lowers attic heat gain during occasional Alberta heat waves and helps stabilise year‑round indoor conditions
  • Solar‑compatible profiles engineered for modern bracket‑mounted photovoltaic systems common in Metro Calgary‑area installations
  • Fully recyclable aluminum roofing contributes to sustainable building practices for Millarville homeowners
  • Low‑maintenance finish resists delamination, fading and biological growth in shaded valleys or north‑facing roof areas around Millarville
  • Lifetime‑Limited transferable warranty provides measurable long‑term protection and resale confidence for Millarville properties

Metal roofing built for Millarville's climate

Averages (10-yr): ~359 mm rain and 113 cm snow per year, ~3303 sunshine hours, mean 3.7°C, typical daily-max winds ~17 km/h with gusts to 98 km/h, and ~126 freeze–thaw days per year.

  • 113 cmavg. snow / year
  • 359 mmavg. rain / year
  • 126freeze–thaw days / year
  • 98 km/hpeak wind gusts
  • 3303 hrsannual sunshine
  • 3.7°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 (Alberta) Ltd.

Hours

  • Monday8:00 AM – 4:00 PM
  • Tuesday8:00 AM – 4:00 PM
  • Wednesday8:00 AM – 4:00 PM
  • Thursday8:00 AM – 4:00 PM
  • FridayClosed
  • SaturdayClosed
  • SundayClosed

Interlock Metal Roofing (Alberta) Ltd. has proudly served homeowners across Southern Alberta since 1999, providing durable and energy-efficient aluminum roofing systems designed for the Prairies’ wide range of weather conditions. From Red Deer to Calgary, Lethbridge, and Medicine Hat, our roofs are engineered to withstand hail, wind, and snow—while enhancing the look and long-term value of your home. As part of one of Canada’s leading metal roofing manufacturers and installers, we’re committed to sustainable craftsmanship, professional installation, and a lifetime of protection backed by an industry-leading warranty.

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Part of the Interlock® certified installer network →

Get a Free Metal Roof Estimate in Millarville, Alberta

Interlock® Aluminum Roofing — all-climates performance specs for Millarville, Alberta

Spec / RatingClimate / Risk Factor + What It Solves
Wind resistance: 120+ mph (193+ kph)Extreme wind, hurricanes, storm uplift: full interlocking attachment helps prevent blow-offs, edge lifting, and panel loss in high-gust events.
Fire rating: Class A (with proper assembly)Wildfire, embers, radiant heat, chimney sparks: non-combustible roof assembly provides the highest residential fire protection rating.
Hail resistance: UL 2218 Class 4Hail and impact debris: highest impact classification; resists cracking, splitting, and surface loss common with asphalt under hail strikes.
Snow & ice performance: interlocking, shedding profileHeavy snow, freeze-thaw, ice dams: smooth aluminum sheds snow efficiently and the interlocking design helps block water intrusion when melt-refreeze cycles occur. (Final snow-load capacity depends on roof structure and local code.)
Corrosion resistance: aluminum (won’t rust)Salt air, coastal humidity, wet climates: aluminum naturally resists rust and corrosion, reducing long-term failure risk in marine or high-moisture environments.
Heat / UV durability: baked-on coating systemHigh heat, intense sun, thermal cycling: coatings resist UV breakdown and temperature-swing fatigue, slowing fading and surface degradation.
Moss / algae resistance: smooth coated surfaceWet shade, organic growth: low-porosity metal surface gives moss/algae less to grip, reducing staining and maintenance.
Material: heavy-gauge aluminum roof profiles (Slate / Shake / Shingle / Tile / Standing Seam)All-season structural stability: lightweight, dent-resistant metal system stays stable through large hot-cold swings and severe weather.
Expected lifespan: 50+ yearsLong-term durability across climates: avoids re-roof cycles typical of shorter-life materials, even in high-stress environments.
Warranty: Lifetime-Limited, non-prorated + 50-year transferableLifetime protection + resale value: guarantees long-term material confidence and transfers to future owners.

Available Profiles in Millarville, Alberta:

Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.

7 completed Interlock® metal roofs in Millarville, AB

Interlock® has completed 7 metal roofs in Millarville, Alberta between 2002–2023, across 3 roof profiles (Slate, Shingle, Cedar Shake). Every marker is a real, anonymized installation completed by a Certified Interlock Installer — explore them on the interactive map and photo grid below, filterable by profile, colour and year of completion.

  • 7completed roofs
  • 3roof profiles
  • 2002–2023years

4.6 / 5 — from 1,448 verified customer reviews in Alberta

What our customers are saying:

★★★★★
Review: August 7, 2025Completion: August 11, 2025

Absolutely Outstanding Experience with InterLock Roofing From our very first consultation with InterLock Roofing, we were impressed by their professionalism, integrity, and clear commitment to safety and quality. They assured us upfront that they held themselves to the highest standards—both in workmanship and in health and safety—and they delivered on every promise. When the team arrived on site, every worker was focused, diligent, and clearly well-trained in safety protocols. It was incredibly reassuring to see a company not only take pride in their work, but also prioritize the well-being of their crew in what is undeniably a dangerous trade. The final product was absolutely superb—flawless installation, meticulous attention to detail, and no shortcuts taken. The project was completed on time, with a thorough final review and sign-off process that left us fully confident in the longevity and performance of our new roof.Many of our neighbors complimented us on how our home is looking now:) We’re proud to have worked with a Canadian company that upholds such exceptional standards. InterLock Roofing stands out not just for the unmatched quality of their work, but also for their ethical approach and genuine care for both customers and employees. A super, super company—highly recommended!

★★★★★
Review: January 21, 2019Completion: November 13, 2018

Our experience with Interlock Metal Roofing Systems can only be described as highly recommended. From the start, Matthew was very knowledgeable on the roofing product and was able to fully describe what was needed for our house. He was able to give us multiple examples of homes that had this system installed on it which allowed us to visualize and decide on the style that we wanted. Once this was completed, he went out of his way to ensure that all of our questions were answered and that we were educated on this product. After the roof was ordered, Shauna did an exceptional job communicating the status of our roof and when it was expected to be delivered as well as when the installation would begin. She was extremely thorough in what we were to expect and the timing of everything that would occur. Due to it being a custom roof, the materials had to be manufactured prior to the installation being done. She continued to update us as the materials were being manufactured and any changes that occurred with the scheduling. She is an absolutely extraordinary resource to have and made the total experience complete. Without her work coordinating and communicating the status of the job, our satisfaction would not be at the same level! Our installer, Oswaldo, and his crew can only be described as extraordinary! They are truly Master Craftsmen and are some of the best we have ever worked with on ANY project. Their thoroughness, attention to detail, communication and general demeanor were beyond anything that could have been expected. From the time they arrived in the morning to the time they left every evening they were a joy to work with. The worksite was cleaned up every evening and was always organized as the job proceeded. Oswaldo and his crew are truly what made this job perfection! His updates on the project were very detailed and his explanation of every step of the process made us feel like we truly were fully involved. We could not recommend him any higher and he looked after our home like it was his own! We could not be prouder of the way the job was completed and we are very happy with the Interlock Metal Roofing System that was installed. The finished product truly is a work of art that will enhance our home for years to come!

★★★★★
Review: September 9, 2006Completion: August 2, 2006

I am pleased to say that the installation went very smoothly and that it was a pleasant experience. The installers were always in time, courteous, fast and professional. The thorough cleaning of the garden and around the house was particularly appreciated. The changes on the house are beyond expectations and the general curb appeal, with the stone tiles, making it the best of the neighbourhood. The added value to the house is obvious and I will certainly recommend Interlock to anybody. It was overall a very positive experience.

★★★★★
Review: August 15, 2023Completion: September 22, 2023

We have smaller bi-level forever home with a detached garage and we wanted to upgrade our roofs for both after a horrific hail storm. My husband has always dreamed of metal roofing and Interlock made it possible. The entire experience was flawless and enjoyable. They really cared about our humble abode (we tired to get quotes elsewhere for metal roofing and three other companies didn't even send back a quote as it was obvious, our home was too small a project for them), but not Interlock, I found them online after my husband had a bout of bad luck and they were on it! We are so pleased for their courtesy and little extras we received when asked. They are really a top notch company in this day and age. We are excited to be able to enjoy our beautiful roof, and to never have to worry about replacing it is priceless to us. The picture does not do it justice. Thanks to the entire team. We are grateful. **Positive: **Responsiveness, Punctuality, Quality, Professionalism

★★★★★
Review: September 20, 2010Completion: September 13, 2010

I've had a few days to get used to the look of the new roof, and I can't believe how good it looks, nothing like the metal roofs of old. It looks like slate, exactly as you said it would. Arthur (the roofer) was a real pleasure, polite, friendly and very hard working. He took great efforts to clean up any debris at the end of each day. He swept the lawn with a magnet to pick up any dropped nails and screws. He even painted any scratched paint work. I have the satisfaction of knowing that the house will never need re-roofing, which means no more old roofing for the city dump, and that the new ">roof is made from recycled materials I couldn't be more pleased with the new roof and I would recommend it to everybody. Thank you to everybody at Interlock for making it happen.

★★★★★
Review: November 5, 2006Completion: September 27, 2006

We would like to thank you and Interlock Roofing for job well done in replacing our roof. When you visited to explain your product and what a great improvement it would be to our home, we couldn’t really imagine how true this would be. We had seen other homes in our area with your product and were very impressed by the look of the roof. From the time of placing our order and having the job completed it was all within the time frame that was quoted to us. We would like to share a special thank you to Jason and Darren, our two installers, who did the job in a very professional manner. Clean up of the yard, after install was completed was also exceptional. Also we certainly appreciated the extra attention that Brad gave in following the progress of the install and his personal contact with us after the job had been completed. We would recommend Interlock and Brad to family and friends. The thing we like most about the roofing system is that it is maintenance free and we feel this has added value to our home.

★★★★★
Review: July 14, 2006Completion: June 29, 2006

Mary & I are pleased to let you know that we are delighted with our new Interlock roof and we would recommend you and the product to anyone who inquires. We have had many compliments from neighbours and strangers. The ‘weathered gray’ colour was the perfect choice for our home and the roof looks great. It fits in well with the existing pine shake roofs in Valley Ridge. I expect that the roof will outlive both of us and add to the value of our house. The installation by Jason and Darren was executed professionally by these 2 very pleasant young men.

★★★★★
Review: May 20, 1999

As I promised, here is our very belated letter following the installation of our new Interlock Roof in mid April of this year. Mark and Martin, our installers, were terrific. They were courteous and friendly and Mark took the time to answer all my questions. They cleaned up those huge mounds of old shakes completely and they left the worksite neat and tidy at the end of each day. They did a great job! As Mark told me when I complimented them, he treats each job as if he were doing it at his own home. They take pride in their work. Ted, I think these guys deserve a raise!! We are very happy with the appearance of the roof and knowing that we are worry free for the rest of our lives is a good feeling. The neighbors watched the installation with great interest as most of them also need to re-roof their houses soon. When I saw how crumbly and dry those cedar shakes were, I would say sooner, rather than later. I’m glad we did it now rather than waiting until we had either water leaking in and staining our vaulted ceiling or shingles flying off in the wind. When you are back in Calgary feel free to stop by and take your pictures; now that spring is here the yard is looking quite lovely. Call me first so I can put the coffee pot on!

★★★★★
Review: December 15, 2019Completion: April 10, 2017

I did a lot of research prior to selecting Interlock roofing. There are an abundance of good roofing material on the market but I was looking for a very long term and maintenance free product. Interlock offered an excellent product and a great warranty. Their installers showed up on time, were very professional and courteous, and did the job within the estimated time schedule and price. Before the job was even started a few things were pointed out which required some slight roof modifications and venting changes. This was explained to me in a very professional and understanding way. Any sections of underlying plywood which were not up to standard were also replaced at the agreed upon price. Before any changes were made I was shown the reason why and I gave approval prior to proceeding. I am very happy with the installation and product and would definitely endorse an installation through Interlock. I waited 3 years before writing this review because I wanted to make sure everything worked properly without any call backs.

★★★★★
Review: April 7, 2025Completion: April 9, 2025

After 25 years in our home we realized it was time to replace our roof. Asphalt shingles were always the way to go ..however, we decided to investigate other products. We have always been very interested in a tin roof but were worried it may be too shiny for our home. After thorough research we saw the Interlock product at a home show & became immediately interested in the different styles & colour choices. We set up an appointment in our home with Tyler to have Interlock view our roof line to make sure the slate style look would work. The product is strong, lightweight, tough durable & comes with a 50 year transferable warranty. We were impressed to say the least. Now that our roof is complete (Wow) thanks to the professional installation by Alexis the neighbourhood is abuzz with questions & compliments. It’s beautiful!!! & the Interlock slate style compliments our home. Thank you Tyler for all the information & support in helping us make a rewarding decision. We couldn’t be happier!

★★★★★
Review: June 4, 2024Completion: May 16, 2024

We recently had a new roof installed in Calgary. We chose the interlock system as a long term replacement and upgrade to our pine shakes which although maintained a few years ago were showing signs of significant deterioration. Our experience with the interlock office and their installers was great with no significant issues. Work was completed as per the agreed schedule and the workmanship appears to be at a high standard and we are exceptionally happy with the appearance of the new roof. The higher cost may not work for everyone but for various reasons, this was the option we selected. We would recommend Interlock to anyone interested in having a great looking roof that greatly enhances the appearance of our home and promises to provide a long term worry free roofing solution for years to come.

★★★★★
Review: April 15, 2023Completion: April 27, 2023

Amazing product and very professional and helpful installation. The communication throughout the process was spot on. I would highly recommend inter lock. **Positive: **Quality **Services: **Roof installation

Read all Alberta metal roofing reviews →

Nearby service areas in Metro Calgary

Interlock® metal roofing is also installed in these communities near Millarville:

Metal Roofing FAQs for Homeowners in Millarville

The following metal roofing FAQs are designed specifically for homeowners in Millarville, Alberta. 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 Millarville.

How does a metal roof handle heavy snow in Millarville winters?

Interlock metal roofing sheds snow safely because its smooth, hard surface prevents ice dams that trap water behind dam-like ice buildup on asphalt roofs. Millarville receives about 113 cm of snow annually across roughly 126 freeze-thaw days, creating ideal conditions for ice dam formation—a leading cause of water damage. The four-way interlocking aluminum panels are warranted to 120 mph wind resistance, so snow load (typically lighter than slate or concrete tile) never stresses your structure. Snow guards are available if you prefer controlled melting. The lightweight design means no structural reinforcement needed, unlike heavy alternatives.

Will freeze-thaw cycles crack or degrade my metal roof over time?

No. Aluminum's crystalline structure and oxide layer actually improve under freeze-thaw stress—it experiences no expansion-contraction fatigue like asphalt, wood shakes, or concrete. Millarville endures about 126 freeze-thaw cycles yearly across mean temperatures of 3.7°C, plus roughly 113 cm of annual snow: conditions that split wood shakes and cause asphalt to crack and curl. Aluminum roofing-grade alloy (ASTM B209) and the Alunar 70% PVDF coating (30-year fade and chalk warranty) remain dimensionally stable through decades of temperature swings. This durability is why Interlock installations span from salt-air coastal homes to Antarctic research stations.

Can a metal roof rust in Alberta's wet climate?

Aluminum cannot rust because it contains no iron—the element that oxidizes into rust. Instead, aluminum forms a thin, self-healing oxide layer that blocks corrosion. Even if scratched, this oxide regenerates automatically. Millarville's annual rainfall of about 359 mm and regional moisture exposure cannot compromise the material itself. The Alunar 70% PVDF fluorocarbon coating, applied to both sides, adds extra protection and is warranted 30 years against chalking and fading (ASTM D4214 standards). The Guardian lifetime limited warranty explicitly covers rusting, giving you permanent peace of mind—a guarantee no steel or copper roof offers.

Does hail damage matter for a metal roof, and can I lower my insurance?

Interlock metal roofing earns UL 2218 Class 4 impact rating—the highest available—and the warranty covers hailstone perforation up to 1.5 inches. Alberta's hail season and Millarville's typical wind gusts of 17 km/h (with extremes near 98 km/h) mean impact resistance matters. Some insurers offer discounts for Class 4 roofing; contact your provider with the UL listing (Intertek 33876) for quotes. Unlike asphalt, which dents and loses granules, or wood, which splits, aluminum's hardness means you retain both appearance and protection. This durability translates to lower repair costs and potential premium reductions over the roof's lifetime.

Is a metal roof worth the upfront cost compared to asphalt shingles?

Yes, when you measure total cost over the roof's life. Asphalt typically needs replacement every 15–20 years; a metal roof lasts 50+ years and carries a lifetime limited warranty for the original owner—one-time transferable to the next owner for 50 years. Over four decades, you'll replace asphalt twice while your metal roof requires only occasional inspection. Millarville's 359 mm annual rainfall and 113 cm snow mean frequent weather stress; metal avoids costly asphalt repairs from ice dams, UV fade, and granule loss. Current regional promotions include interest-free payments for 3 months and at least $2499 in savings. The Guardian warranty's non-prorated coverage means no deductibles—a major financial edge.

How much maintenance does a metal roof actually need?

Interlock metal roofing requires significantly less maintenance than asphalt, wood, or tile. No granule replacement, no algae treatment, no seasonal cleaning of debris traps. Twice yearly, walk around and clear leaves from gutters and valleys—the same task any roof demands. Asphalt shingles in Millarville's climate (roughly 3303 sunshine hours yearly, plus 113 cm snow and 359 mm rain) degrade from UV exposure and moisture, requiring patching and eventual full replacement. Metal roofing resists both UV and moisture intrinsically. CALGreen verification documents its reduced-maintenance design. The Alunar 70% PVDF coating maintains color and finish with zero intervention, warranted for 30 years, making metal a genuine low-touch investment.

What style options exist if I want the look of slate, cedar shake, or tile on a metal roof?

Interlock offers five profiles to match your aesthetic: Slate, Cedar Shingle, Shake, Mediterranean Tile, and Standing Seam. Each uses the same roofing-grade 3105-H24 and 3003-H24 aluminum alloy and four-way interlocking system, so performance is identical while appearance shifts to suit your home's character. The Mediterranean Tile profile, for example, weighs just 0.59 lb/sq ft—about 96% lighter than actual clay or concrete tile—so it installs over most existing roofs without structural reinforcement. Each profile is available in multiple colors, including energy-efficient finishes. Millarville's diverse architectural styles mean there's a metal profile and color that complements your home while delivering 50+ years of protection.

How long does installation take, and can I install over my existing roof?

Most homes complete installation in 2–5 days depending on size and complexity. A major advantage: Interlock's lightweight design (Shingle profile at 0.41 lb/sq ft, Shake at 0.58, Tile at 0.59) installs directly over most existing asphalt roofs—no tear-off required unless structural damage exists. This saves labor, avoids debris, and keeps your home protected during the process. Interlock Metal Roofing (Alberta) Ltd. has served the region since 1999 and manages permitting, existing-roof assessment, and final inspection. The ICC-ES evaluation report (ESR-1790, reissued 2025) confirms installation over existing sheathing meets IBC and IRC codes. Your installer will confirm whether your specific roof deck qualifies before work begins.

Will a metal roof help with cooling costs in summer?

Yes. Interlock's energy-efficient colors reflect rather than absorb heat, with thermal emissivity up to 0.84 and initial solar reflectance up to 0.55 (Aged Copper Penny and other cool-rated finishes). Asphalt absorbs that same solar energy, raising attic temperature and forcing air conditioning to work harder. Across Millarville's roughly 3303 annual sunshine hours, reflective metal roofing reduces cooling loads measurably, especially in peak summer. The Cool Roof Rating Council rating quantifies this benefit for energy calculations. Combined with metal's durability, you're investing in long-term energy savings. Choose a cool color at installation, or switch profiles later if needed—the system's flexibility means future aesthetic changes don't sacrifice performance.

Is metal roofing actually better for the environment than asphalt?

Significantly. Interlock aluminum is approximately 95% recyclable at end of life, whereas asphalt shingles end up in landfills—a cycle that repeats every 15–20 years. Over 50 years, a home re-roofed twice with asphalt contributes multiple tear-offs to landfill waste. Aluminum roofing breaks that cycle: it can be melted and reformed indefinitely without loss of quality. Manufactured in Delta, BC since 1998, Interlock has installed roofing across thousands of homes—avoiding cumulative landfill burden. The material itself requires no chemical treatments or sealants, and the four-way interlocking system reduces scrap during installation. CALGreen verification confirms its reduced-maintenance, reduced-waste design. Choosing metal roofing is a practical way to lower your home's environmental footprint across decades.

Is a metal roof a good choice for Millarville’s climate?

Yes. Millarville averages about 113 cm of snow, 359 mm of rain, roughly 126 freeze–thaw days a year, with peak wind gusts near 98 km/h. Interlock® aluminum roofing is wind-rated to 193+ km/h (120 mph), UL 2218 Class 4 impact-rated and Class A fire-rated, and its four-way interlocking panels shed snow and resist ice dams and freeze–thaw cracking — all backed by a lifetime limited, transferable warranty.

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