Metal Roofing in Lethbridge, Alberta — Lifetime Interlock® Aluminum Shingles Installed Locally
Lethbridge Metal Roofing Experts Installing Lifetime Interlock® Aluminum Shingles Since 1999
Metal Roofing Built for Lethbridge's Heavy Rain, Snow Loads, Windstorms & Lifetime Protection
Interlock Metal Roofing (Alberta) Ltd., founded February 5, 1999, is your trusted Lethbridge metal roofing contractor and exclusive authorized installer of the Interlock® Lifetime Roofing System in Alberta, providing expert roof replacement and re‑roofing across Lethbridge and surrounding communities. Engineered for performance, beauty, and durability, the Interlock Lifetime system pairs heavy‑gauge, fire‑resistant aluminum with the Alunar® Coating System and a Lifetime Warranty to deliver energy‑efficient cool roofs built for Alberta’s conditions — from heavy snow and freeze‑thaw cycles to hail, strong prairie winds, and intense UV exposure. Choose the timeless look of slate, cedar shingles, shake, Mediterranean tile, or standing seam with superior snow‑shedding, long‑term protection, and the proven performance homeowners in Lethbridge rely on.
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 ~100 freeze–thaw days a year
Corrosion Resistant
Aluminum won’t rust or corrode
- Proudly manufactured in Canada by a family-owned company, serving homeowners across Lethbridge and Southern Alberta
- Exclusive authorized installer of Interlock® Lifetime Aluminium Roofing Systems for Lethbridge residences
- Designed for Lethbridge’s prairie climate — frequent Chinook wind events, cold winters and rapid freeze–thaw cycles across Southern Alberta
- Alunar® Coating System (no visible aluminium surface) provides a durable, fade-resistant finish that tolerates regional UV, dust and seasonal abrasion
- Precision weatherproof seams (profiles: slate, cedar, shake, tile) and mechanical fastening (profile: standing seam) deliver long-term leak protection during wind-driven rain events
- Engineered and tested to withstand severe prairie windstorms — rated to 193+ km/h to help protect roofs from Lethbridge gust events
- Snow-shedding panel geometry reduces heavy snow buildup and helps manage structural snow loads during Lethbridge winters
- Smooth aluminium surfaces and secure underlayment interfaces reduce ice-dam risk during local freeze–thaw cycles
- Class A fire-rated available to address wildfire ember exposure and dry-season fire risk in Southern Alberta near Lethbridge
- UL 2218 Class 4 impact resistance for protection against hail, falling branches and storm debris common on the prairies
- Reflective cool-roof performance lowers attic heat gain during summer heat waves and improves year‑round energy efficiency for Lethbridge homes
- Solar-compatible design engineered for modern bracket-mounted photovoltaic systems on Lethbridge rooftops
- Fully recyclable aluminium construction minimises life-cycle waste and suits environmentally conscious Southern Alberta homeowners
- Architectural profiles replicate slate, cedar shake, tile and standing seam to match Lethbridge neighbourhood aesthetics
- Low-maintenance roofing backed by a Lifetime‑Limited transferable warranty for long-term protection and resale value in Lethbridge
Metal roofing built for Lethbridge's climate
Averages (10-yr): ~271 mm rain and 96 cm snow per year, ~3410 sunshine hours, mean 6.8°C, typical daily-max winds ~20 km/h with gusts to 111 km/h, and ~100 freeze–thaw days per year.
- 96 cmavg. snow / year
- 271 mmavg. rain / year
- 100freeze–thaw days / year
- 111 km/hpeak wind gusts
- 3410 hrsannual sunshine
- 6.8°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.
- 210, 3750 46 Ave SE Calgary, AB T2B 0L1 Canada
- Phone 587-317-6517
- Sales & Marketing sales@albertametalroofing.com
- Toll-Free 1-866-733-5811
- Customer Service abservice@interlockroofing.com
- www.AlbertaMetalRoofing.com
- Also calgarymetalroofing.comedmontonmetalroofing.comgrandeprairieroofing.com
- Serving Alberta since 1999 — 27 years
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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Get a Free Metal Roof Estimate in Lethbridge, Alberta
Interlock® Aluminum Roofing — all-climates performance specs for Lethbridge, Alberta
| 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 Lethbridge, Alberta:
Explore all Interlock® metal roofing systems, or see the Guardian lifetime warranty and independent testing reports.
Recent Interlock® roofs across Alberta
103 completed Interlock® metal roofs in Lethbridge, AB
Interlock® has completed 103 metal roofs in Lethbridge, Alberta between 2005–2024, across 5 roof profiles (Slate, Shingle, Cedar Shingle, Cedar Shake, Tile). 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.
- 103completed roofs
- 5roof profiles
- 2005–2024years
Open Lethbridge on the interactive project map →Browse all Interlock® projects in Alberta →See more Interlock® projects →
What our customers are saying:
I am very happy with the roof that was installed by Interlock. The workers were very nice and they finished the job with great quality. They were here bright and early in the morning when they started and it did not take them long to finish the roof. I recommend Interlock to everyone. It is a great company that does a great job.
The Interlock Roofing System was delivered and installed on time in spite of a delay in startup due to rain and another day delay due to rain after half the roof was done. The crew was courteous and friendly and cleaned up at the end of every day. I was very satisfied that the place was left tidy and clean after final cleanup. I recommend Interlock Roofing to anyone wanting an impressive nice looking roof.
Recently my wife and I came to the conclusion that we really could not put off replacing our roof much longer and so we started researching materials and costs. During the time we were doing our research we ran across INTERLOCK representative, Brad, at the Lethbridge Home and Garden Show at which he explained the INTERLOCK ROOFING SYSTEM TO US. We were impressed with what Brad had to say and consequently, we invited him to our house to have a look at the problem and give us an idea of what it would cost to have our roof done. After talking with Brad the second time, we both decided that the advantages of this roof far outweighed the fact that it was going to cost more than an asphalt shingle roof. How do you say no to a 50-year warranty? Well, now our new roof is on the house we both feel it was one of our better decision regarding our home. The roof looks beautiful. The entire process was very straightforward and painless. People showed up when they said they would show up, the installer was an absolute professional, Brad kept track of the entire process and there were no hidden charges. We have already had a Realtor inform us that the new roof will definitely increase the value of our house. In short, I would strongly recommend that anyone in need of a new roof give very serious consideration to Brad and the INTERLOCK roofing system. We have been extremely impressed with the integrity and professionalism of the installer. First Class! From our first conversation with Brad through the completion of our new roof, we have had a high level of confidence in INTERLOCK, their roof system, and most importantly, their people!
Recycling of their scrap metal. Do they do that? It would cut into their time but then the debris would not be so haphazardly cast around and the planet and garbage dump would benefit. Overall we are pleased and keen on seeing how the roof (and our new eaves-troughs) hold up to the winter snow. All people we met were quite friendly and helpful. We will likely recommend the product and people to others.
Our first exposure to Interlock Roofing was when Brad knocked at the door, having been referred by a neighbour who knew we wanted a new roof. Brad explained in detail about the roof, about how it was priced, and when it would be done. Installation was done in March, as scheduled and took 7 1/2 days. Both workers were friendly, neat and professional having worked for Interlock for many years. They threw the old shakes directly into the bin, so there was no mess around the house and to ensure there would no problems later, they checked on the attic vents and cleared those partially blocked. We like the look and colour of the Interlock roof and it is admired by passer-by’s who often stop to ask about it. We have no hesitation in recommending it to others.
Today, the Interlock Roofing Installers have completed the installation of a great looking roof on our home. Later in the month of September, as I was standing on the deck of my home, enjoying the Autumn air, I noticed that one of my neighbours was having a new roof installed on their home. This roof definitely appeared to look much different than the ordinary asphalt shingles that are prevalent on most homes. So, I needed to get a closer look. As I came to the home where the roof was being installed, I thought, boy, this is really “extraordinary”……..and I liked what I had seen. I enquired of the installers to know more about the product, I was informed that I should leave my name and phone number, and a representative would contact me. Within a few days, I received a phone call from Brad (local Interlock representative) and an appointment was set, so we could be informed more about the product. Our roof at that time was asphalt shingles, which were beginning to curl in some areas (mainly the South side) of the roof. I knew that we’d be lucky if we could get about one more years wear, without replacing the roof. The job was professionally completed by Interlock Roofing trained installers. There’s no doubt in my mind but what the value of our property has risen considerably, however, we are anticipating enjoying our home for many years to come. At this point, it’s too early to notice any changes to our home………except the roof certainly helps to enhance the beauty of our home. We have already had some very positive comments from some of our neighbours. If you might be considering a new roof on your home, I would truly recommend that you listen to Mr. Reagh……..he really knows all there is to know about roofing. Mr. Reagh is representing the best roofing product that’s on the market today. I really wanted the best roof installed because I didn’t want to be having to redo my roof again in a few years. We now have peace of mind, in knowing that we have the best roof that’s available.
It was a pleasure working with the Interlock Roofing crew and staff. Not only did they finish the job in a timely manner but they completed the job almost two months earlier than was scheduled, allowing us to go on our scheduled vacation. Thank you Interlock Roofing for an excellent job!!!
To anyone interested in purchasing the Interlock roof system, it will be the best purchase you ever make. We have already noticed a difference in my house temperature. The workers were very polite and courteous. Brad came by a couple of times to make sure everything was good. We would recommend this company to anyone looking for a new permanent, maintenance-free roof.
We didn't realize the installer was coming that day because it was not confirmed. Other than that we were happy.
The installation crew left our gate open at the end of the day after they cleaned up and our dog escaped.
They were perfect.
I would have liked more phone calls regarding the start date, although I know they probably wanted to wait until they had more information before they called. Personally, I've never commented on any ones roof before and never really thought that roofs could be pretty, but we have had tons of comments on how beautiful our roof is since it was installed. Thanks very much!
Nearby service areas in Southern Alberta
Interlock® metal roofing is also installed in these communities near Lethbridge:
Metal Roofing FAQs for Homeowners in Lethbridge
The following metal roofing FAQs are designed specifically for homeowners in Lethbridge, 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 Lethbridge.
Will freeze-thaw cycling in Alberta damage a metal roof over time?
No — aluminum actually improves under freeze-thaw stress. With about 100 freeze-thaw days per year in Lethbridge, your roof experiences constant expansion and contraction, but 3105-H24 aluminum alloy doesn't crack, warp, or become brittle. The material flexes without fatigue. Asphalt shingles, by contrast, lose granules during freeze-thaw cycles and fail faster in your climate. Interlock's panels are rated to ICC-ES ESR-1790 standards and come with a lifetime limited warranty covering cracking and loss of integrity — peace of mind through a full Alberta winter.
How does a metal roof handle heavy snow load and ice dams in southern Alberta?
Metal roofs shed snow and ice more effectively than asphalt because the smooth, hard surface prevents snow adhesion and ice buildup. Lethbridge averages about 96 cm of snow annually, and the four-way interlocking aluminum panels, warranted for winds up to 120 mph, anchor snow firmly in place when needed while allowing controlled release. Ice dams form when heat escapes through poor insulation, not the roofing material itself — proper attic ventilation and underlayment (installed as part of our process) prevent dams on any roof. Snow guards are available if you want to manage slide-off onto walkways.
Why does an aluminum roof resist corrosion better than steel in Alberta's climate?
Aluminum cannot rust because it contains no iron — the element that oxidizes and deteriorates. Instead, aluminum develops a protective oxide layer that self-heals when scratched, meaning salt spray, rain (you get about 271 mm annually), and humidity won't corrode it. Steel roofing rusts from the inside out once the coating scratches. Our Alunar 70% PVDF fluorocarbon finish is applied to both sides of every panel for extra durability in any climate, and it's warranted 30 years against chalking and fading. In Lethbridge's variable moisture, aluminum is simply the more durable choice.
Can a metal roof stand up to Lethbridge's wind gusts?
Yes. Lethbridge averages wind gusts near 111 km/h, and Interlock panels are four-way interlocking and warranted to resist wind speeds up to 120 mph (193 km/h) when installed to specification. The interlocking design prevents panels from lifting or separating — each panel locks its neighbors in place, distributing wind load across the entire roof rather than stressing individual fasteners. This engineering, combined with the panels' light weight (the Slate installs at 0.41 lb/sq ft), means wind forces push down rather than peel up. You get structural security without the weight of traditional slate or tile.
Do I need to reinforce my roof framing to support metal roofing?
Almost never. Interlock's metal panels are extraordinarily light — the Shake profile installs at just 0.58 lb/sq ft, and the Mediterranean Tile at 0.59 lb/sq ft, making it about 96% lighter than concrete or clay tile. This means no structural reinforcement is required and the roof installs over most existing structures, including older asphalt shingles. Your home's frame is already designed for far heavier loads. The only exception is if a structural engineer identifies existing damage, but Interlock's lightweight design works with nearly every Alberta home built in the last 50 years.
Will my insurance company offer discounts for a metal roof rated for hail?
Many do. Interlock roofing is UL 2218 Class 4 impact-rated — the highest available — and our warranty covers perforation from hailstones up to 1.5 inches. Contact your insurer for specifics on your policy, but Class 4 impact ratings often qualify for premium discounts because hail claims drop dramatically. In southern Alberta, hail season is a real concern, and underwriters recognize that a Class 4 roof reduces their exposure. Present your roof specification and UL rating to your agent; the discount conversation is worth having before installation.
Is metal roofing really cheaper than asphalt over the long run?
Yes, when you measure the full lifespan. Asphalt typically lasts 15–20 years and requires tear-off, hauling, and landfill fees — a cycle you repeat three times in 60 years. Interlock comes with a lifetime limited, non-prorated material warranty for the original owner and transfers 50 years to the next owner, eliminating multiple replacement cycles. You buy one roof and keep it. Over 60 years, the math favors metal: no tear-off waste, no recurring labor, no gap years without protection. Initial cost is higher, but cost per year of protection is lower — that's real value in a market where your roof is one of your home's biggest investments.
What's the installation process, and can you put it over my existing asphalt shingles?
Yes, Interlock installs directly over existing asphalt shingles in most cases — no tear-off required. Our crew removes ridge caps and flashing, installs underlayment and ice-and-water shield, then locks each aluminum panel into place with four-way interlocking that holds neighbors tight. The process typically takes 2–4 days depending on roof size and complexity. Because the panels are lightweight (0.41–0.59 lb/sq ft), your existing framing carries the load easily. Installing over your old roof saves landfill waste and labor cost, and it means minimal disruption to your home. We handle permits and coordinate with your local authority using ICC-ES ESR-1790 compliance documentation.
Is metal roofing actually more environmentally friendly than asphalt?
Absolutely. Interlock aluminum is approximately 95% recyclable at end of life, so your roof doesn't become landfill. By contrast, a typical asphalt roof is torn off and dumped — a cycle that repeats every 15–20 years. Over 60 years, you'd dispose of three to four asphalt roofs versus zero metal roofs. Aluminum is also CALGreen-verified for reduced maintenance, meaning fewer chemicals, fewer foot-traffic disturbances, and a cleaner lifecycle. When your home is eventually renovated or demolished, the metal is salvaged and remilled; the material cycle closes. This matters in Lethbridge's water-conscious region where landfill capacity is finite.
Can a metal roof actually lower my cooling costs in summer?
Yes, if you choose an energy-efficient color. Interlock offers reflective finishes with thermal emissivity up to 0.84 and solar reflectance as high as 0.55 (our Aged Copper Penny is Cool Roof Rating Council rated). These colors bounce heat away rather than absorbing it like dark asphalt shingles do. In Lethbridge's 3410 annual sunshine hours, that reflectance reduces attic temperature and cooling load, especially in late spring and early fall. Paired with proper attic ventilation, a reflective metal roof cuts air-conditioning demand. The benefit is real in our sunny climate, even with 96 cm of winter snow — you gain efficiency year-round because summer sun angles are steep and heat rejection matters.
Is a metal roof a good choice for Lethbridge’s climate?
Yes. Lethbridge averages about 96 cm of snow, 271 mm of rain, roughly 100 freeze–thaw days a year, with peak wind gusts near 111 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.
