Made in CanadaCanadian owned since 1999Guardian Lifetime Limited Material WarrantyWind warranted to 193 km/h installed to manufacturer specificationAluminum cannot rustSolar-readyAlaska to AntarcticaUp to 95% recycled aluminumClass A fire rated assembly availableBBB Accredited A+Baeumler Approved2026 GuildMasterMade in CanadaCanadian owned since 1999Guardian Lifetime Limited Material WarrantyWind warranted to 193 km/h installed to manufacturer specificationAluminum cannot rustSolar-readyAlaska to AntarcticaUp to 95% recycled aluminumClass A fire rated assembly availableBBB Accredited A+Baeumler Approved2026 GuildMaster
Hail, chinooks and long winters. A roof that cannot rust.
Alberta weather is hail in summer, chinooks and deep cold in winter, and wind and strong sun all year. Here is what an Interlock® aluminum roof does about each, and where it has limits.
Hail
Impact-rated, and honest about it
Two Calgary hailstorms show what is at stake: the storm of June 13, 2020 caused nearly $1.2 billion in insured damage, and the storm of August 5, 2024 caused $3.25 billion, the second-costliest insured disaster in Canadian history. Interlock's Slate, Shake, Cedar Shingle and Mediterranean Tile aluminum panels carry a UL 2218 Class 4 impact rating, listed by Intertek under Delta Building Products. No roof is hail-proof, and the material warranty excludes hail larger than 38 mm (1.5 in).
A chinook can lift a winter day from well below freezing to above it within hours, then the cold comes back. Each cycle loosens asphalt granules and curls shingles; cedar takes on water that freezes in the grain. Aluminum absorbs nothing and cannot rust. Interlock panels lock to each other on all four sides with no exposed fastener, and wind resistance is warranted to 193 km/h (120 mph) installed to manufacturer specification.
Snow
Light on the framing, built for the load
Interlock panels weigh roughly 2 to 3.5 kg per square metre depending on profile, a fraction of concrete tile. That leaves the structure's capacity for what an Alberta winter puts on it: snow. Smooth aluminum lets snow slide, so we plan snow guards over entries, walkways and the driveway at the quote.
Ice dams
We look at the attic, not just the roof
Ice dams form when heat escaping into the attic melts snow that refreezes at the cold eaves. No roof covering stops that on its own, and ice damming is excluded from the material warranty. At the estimate we look at insulation and ventilation with you and tell you what we see.
Wildfire
Class A Fire Rated Available, as a complete assembly
FireSmart Alberta recommends Class A roofing and advises avoiding wood shakes and shingles. Under ASTM E108 (CAN/ULC-S107 in Canada) a fire classification belongs to an assembly, not a panel: on our roofs Class A is achieved with two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood. Aluminum itself does not ignite, but no roof is fireproof. If your home backs onto forest, ask us to quote the Class A assembly.
Alberta is sunny, and the sun is stronger at elevation. The Alunar® finish is warranted for 30 years and has CRRC-rated solar reflectance from 0.25 to 0.44 depending on colour, and thermal emittance from 0.83 to 0.86.
What matters where you live
Calgary, Airdrie, Cochrane, Chestermere, Okotoks and Strathmore: hail in summer and chinooks all winter. Calgary is where we have installed more roofs than anywhere else.
Hail season
Impact-rated Slate, Shake, Cedar Shingle and Tile panels (UL 2218 Class 4, listed by Intertek). No roof is hail-proof; ask your insurer how they treat an impact-rated roof.
Chinooks
Snow melts and refreezes many times a winter. Nothing in an aluminum panel to crack, curl or soak up water.
Older homes and infills
The look of slate or cedar on an older bungalow or a new infill, at roughly 2 to 3.5 kg per square metre.
Condo and townhouse boards
One profile and colour across a complex, with the product documents and warranty terms a condominium board asks for.
Edmonton, Sherwood Park, St. Albert, Spruce Grove, Stony Plain, Fort Saskatchewan and Leduc: long, cold winters, deep snow and summer storms.
Long winters
Light on the framing under months of snow, with snow guards planned at the quote.
Ice dams
They start in the attic. We look at insulation and ventilation with you at the estimate.
Hail season
Impact-rated Slate, Shake, Cedar Shingle and Tile panels (UL 2218 Class 4, listed by Intertek). No roof is hail-proof; ask your insurer how they treat an impact-rated roof.
Acreages
House, garage and shop in one profile and colour, in Sturgeon, Parkland and Leduc counties as well as in town.
Red Deer, Lacombe, Olds, Sylvan Lake, Camrose, Wetaskiwin and Rocky Mountain House: the hail corridor between Calgary and Red Deer, lake cabins and farms.
Hail season
Impact-rated Slate, Shake, Cedar Shingle and Tile panels (UL 2218 Class 4, listed by Intertek). No roof is hail-proof; ask your insurer how they treat an impact-rated roof.
Cabins at the lake
Light on older cabin framing, with snow guards planned at the quote.
House, shop and barn to match
One profile and colour across every building on the property.
Freeze-thaw
Nothing in an aluminum panel to crack, curl or soak up water.
Medicine Hat, Brooks and Redcliff: hot, sunny summers, hail and open-prairie wind.
Summer sun
Lighter colours reflect more of the summer sun; how much that saves depends on climate, colour, insulation and ventilation.
Hail season
Impact-rated Slate, Shake, Cedar Shingle and Tile panels (UL 2218 Class 4, listed by Intertek). No roof is hail-proof; ask your insurer how they treat an impact-rated roof.
Wind
Panels locked on four sides; wind warranted to 193 km/h installed to manufacturer specification.
House, shop and barn to match
One profile and colour across every building on the property.
Vegreville, Vermilion, Wainwright and Lloydminster: open prairie, farms, hard winters and summer storms.
House, shop and barn to match
One profile and colour across every building on the property.
Wind
Panels locked on four sides; wind warranted to 193 km/h installed to manufacturer specification.
Hail season
Impact-rated Slate, Shake, Cedar Shingle and Tile panels (UL 2218 Class 4, listed by Intertek). No roof is hail-proof; ask your insurer how they treat an impact-rated roof.
Freeze-thaw
Nothing in an aluminum panel to crack, curl or soak up water.
Interlock® standing seam roofing and Black Diamond siding on six SPOT modules that travel between McMurdo Station and the South Pole, in −51 °C and winds up to 161 km/h. More than 32,000 completed Interlock® roofs across Canada and the USA, and these at the bottom of the world.
“My project required significant smart venting and the sales rep was very resourceful in assessing the home and the smart venting needs”
Nick and Fatima V. · Airdrie · 2025
★★★★★
“They're wonderful. They have been very safety conscious, they have provided excellent work, they displayed excellent work ethics, and they were extremely careful about how to work within the property. Very prompt and very professional.”
“They accommodated all our concerns. Job was completed in a timely manner, and the installers were very experienced.”
Chris and Kerri B. · Medicine Hat · 2025
★★★★★
“Great product, looks awesome lots of compliments on it. Great experience from the sales team to the installation team. Would definitely recommend this product.”
“This company gives excellent service! Both Kevin and Brittany were awesome and professional to deal with. Highly recommend this company!”
Ed M. · Calgary · 2025
★★★★★
“David Thomas was a total professional. Was extremely helpful and informative. Always available if you had any questions. The men working on the roof were all super nice and true pros.”
“My project required significant smart venting and the sales rep was very resourceful in assessing the home and the smart venting needs”
Nick and Fatima V. · Airdrie · 2025
★★★★★
“They're wonderful. They have been very safety conscious, they have provided excellent work, they displayed excellent work ethics, and they were extremely careful about how to work within the property. Very prompt and very professional.”
“They accommodated all our concerns. Job was completed in a timely manner, and the installers were very experienced.”
Chris and Kerri B. · Medicine Hat · 2025
★★★★★
“Great product, looks awesome lots of compliments on it. Great experience from the sales team to the installation team. Would definitely recommend this product.”
“This company gives excellent service! Both Kevin and Brittany were awesome and professional to deal with. Highly recommend this company!”
Ed M. · Calgary · 2025
★★★★★
“David Thomas was a total professional. Was extremely helpful and informative. Always available if you had any questions. The men working on the roof were all super nice and true pros.”
“Great product-10 years later, still love it! (Completion Date: 2012-05-28)”
Dennis G. · Pelican Narrows · 2025
★★★★★
“Awesome service and new roof that looked like it is now armour plated.”
Glenn S. · Lethbridge · 2024
★★★★★
“Pleasant workers who were willing to tell us the steps they were going through. Cleaned up after themselves.”
Ken and Kathy S. · Rimbey · 2026
★★★★★
“I wish the project was cheper, but you get what you pay for, so I am happy.”
Kelly and Carolynn T. · Norglenwold · 2026
★★★★★
“We recently installed a new Interlock Roofing System, and we couldn’t be happier with the decision. Knowing it’s backed by a limited lifetime, non-prorated, fully transferable 50-year warranty gives us real peace of mind.”
Denis D. · St. Paul · 2026
★★★★★
“Everything was handled very professionally. Nothing comes to mind. None”
Wayne and Liz P. · Westlock · 2026
★★★★★
“My project was a new build. I thought it could've been completed sooner, but they were waiting for other people to do their jobs which is something I believe Interlock Metal Roofing can improve on. It was done okay though.”
Stuart D. · Bassano · 2025
★★★★★
“We appreciated the sales person Bryan making adjustments so we could afford this product. In the end it worked out for your company because we did the shop as well. The installers did an excellent job. not that i can think of”
Kevin and Wendy C. · Blairmore · 2025
★★★★★
“Luis was very good to work with. Installed snow guards very quickly after we requested the work. Great roof!”
Sarah B. · Calgary · 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.”
“So very impressed with the total package.. the product,sales person Tyler.. and the working crew.. this metal roof gave our house a very European flavour…. Excellent…!!!!!!!!”
Claire M. · Calgary · 2025
★★★★★
“The guys that installed the roof were very nice, friendly and very professional. Got it done in a few days. Would recommend.”
“Nice guys friendly. Inspected roof and resolved concern immediately.”
Rick C. · St. Albert · 2025
★★★★★
“Such a hard working crew, did a beautiful job on our very complex roof. Worked like troopers 12 hours a day, we're very courteous and thorough. Highly highly recommend!”
“Absolutely wonderful. Professional courteousand clean. Across the street got their roof done in asphalt shingles it took longer and was way messier then ours.”
Heather M. · Medicine Hat · 2025
★★★★★
“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.”
Greg M. · Calgary · 2024
★★★★★
“Pleasant workers who were willing to tell us the steps they were going through. Cleaned up after themselves.”
Ken and Kathy S. · Rimbey · 2026
★★★★★
“I wish the project was cheper, but you get what you pay for, so I am happy.”
Kelly and Carolynn T. · Norglenwold · 2026
★★★★★
“We recently installed a new Interlock Roofing System, and we couldn’t be happier with the decision. Knowing it’s backed by a limited lifetime, non-prorated, fully transferable 50-year warranty gives us real peace of mind.”
Denis D. · St. Paul · 2026
★★★★★
“Everything was handled very professionally. Nothing comes to mind. None”
Wayne and Liz P. · Westlock · 2026
★★★★★
“My project was a new build. I thought it could've been completed sooner, but they were waiting for other people to do their jobs which is something I believe Interlock Metal Roofing can improve on. It was done okay though.”
Stuart D. · Bassano · 2025
★★★★★
“We appreciated the sales person Bryan making adjustments so we could afford this product. In the end it worked out for your company because we did the shop as well. The installers did an excellent job. not that i can think of”
Kevin and Wendy C. · Blairmore · 2025
★★★★★
“Luis was very good to work with. Installed snow guards very quickly after we requested the work. Great roof!”
Sarah B. · Calgary · 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.”
“So very impressed with the total package.. the product,sales person Tyler.. and the working crew.. this metal roof gave our house a very European flavour…. Excellent…!!!!!!!!”
Claire M. · Calgary · 2025
★★★★★
“The guys that installed the roof were very nice, friendly and very professional. Got it done in a few days. Would recommend.”
“Nice guys friendly. Inspected roof and resolved concern immediately.”
Rick C. · St. Albert · 2025
★★★★★
“Such a hard working crew, did a beautiful job on our very complex roof. Worked like troopers 12 hours a day, we're very courteous and thorough. Highly highly recommend!”
“Absolutely wonderful. Professional courteousand clean. Across the street got their roof done in asphalt shingles it took longer and was way messier then ours.”
Heather M. · Medicine Hat · 2025
★★★★★
“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.”
Greg M. · Calgary · 2024
The collection
Five profiles, all heavy-gauge aluminum. Also offered in solid copper.
The look belongs to your home. The performance belongs to the metal. Every profile needs a minimum 3/12 roof slope.
Interlock® Slate
A composed silhouette
Slate
The formal character of slate at a fraction of the weight, in aluminum that cannot rust.
We install the Interlock® aluminum roofing system on Alberta homes, acreages and condo and townhouse complexes, from Calgary, Lethbridge and Medicine Hat to Red Deer, Edmonton and Grande Prairie: interlocking panels locked on four sides with the fasteners out of the weather, made in Canada at the Interlock plant in Delta, BC, and installed by our own Alberta company from our office in Calgary.
Our town pages, local photos and install counts are on our two market sites: one for Calgary, Central and Southern Alberta, one for Edmonton and Northern Alberta. Same company, same Calgary office, same crews, same warranties.
Every Interlock® panel we install is manufactured in Canada by Interlock Roofing at its plant at 9969 River Way in Delta, BC.
An Alberta company
Interlock Metal Roofing (Alberta) Ltd. was founded in 1999 and is based in Calgary, with one office serving Calgary, Edmonton and the rest of Alberta. Canadian owned and operated for 27 years.
Made in Canada, installed by us
The roof is made in Canada and installed in Alberta by our own company. It never crosses a border on its way to your home.
Upcoming shows
Touch the roof before you buy it.
Lift a panel, feel the weight, see every colour in daylight and ask the people who install it. Come find us at a show near you.
We are the certified Interlock® roofing contractor for Alberta, installing Interlock® aluminum roofs since 1999 from our office in Calgary. That one office serves the whole province: Calgary and Southern Alberta, and Edmonton and Northern Alberta. The panels are made in Canada by Interlock Roofing at its plant in Delta, BC, and we install them with our own company. We are BBB Accredited with an A+ rating, Baeumler Approved, a Metal Roofing Alliance member, and winners of a 2026 GuildQuality GuildMaster Award.
Will an Interlock roof stand up to Alberta hail?
It is built for it, but no roof is hail-proof. Interlock's Slate, Shake, Cedar Shingle and Mediterranean Tile aluminum panels carry a UL 2218 Class 4 impact rating, the highest class in that standard, listed by Intertek under Delta Building Products. Very large hail can still dent metal. The manufacturer's material warranty excludes hail larger than 38 mm (1.5 in), and the labour warranty excludes hail, so hail damage is a matter for your home insurance. Some insurers weigh impact resistance and some do not: ask yours, and we will give you the listing and warranty documents they may want.
Which parts of Alberta do you install in?
All of them, from one office in Calgary. We work in Metro Calgary and Metro Edmonton; Central Alberta (Red Deer, Lacombe, Olds, Sylvan Lake and Rocky Mountain House); Southern Alberta (Lethbridge, Taber, Cardston, Pincher Creek, Fort Macleod and Claresholm); Medicine Hat, Brooks and Redcliff; the Foothills and Crowsnest Pass; Banff, Canmore and the Bow Valley; the Peace Country (Grande Prairie, Peace River and Slave Lake); the West Country (Edson, Hinton and Whitecourt); and East-Central Alberta (Vegreville, Vermilion, Wainwright and Lloydminster). Town pages are on our two market sites: calgarymetalroofing.com for Calgary, Central and Southern Alberta, the Foothills and the Bow Valley, and edmontonmetalroofing.com for Edmonton and Northern Alberta. Not sure about your address? Ask us.
What warranties come with an Interlock roof in Alberta?
Two. The manufacturer, Interlock Roofing, gives the Guardian Lifetime Limited Material Warranty on the aluminum material and its factory finish: it runs for as long as the original purchaser owns the home, is transferable once, and excludes workmanship. We, Interlock Metal Roofing (Alberta) Ltd., give a 10 Year Limited Labour Warranty on the workmanship of the installation, for the purchaser who lives in the home. They are separate documents with separate terms, and you can read both in full before you buy.
Do you tear off my old roof?
Usually, and always for cedar shingles or shakes, concrete tile and natural slate. A single layer of asphalt shingles may be roofed over only if our inspection finds it suitable. We tell you which applies to your house at the consultation, and it is part of the fixed price in writing.
How much does a metal roof cost in Alberta?
It depends on your roof, so we price each house after a free consultation instead of publishing a number. The biggest factors are roof area, pitch and complexity (valleys, dormers, skylights and chimneys), what has to come off, the profile you choose, and options such as snow guards or the Class A Fire Rated Available assembly. You get a fixed price in writing, and any current offer is shown on this page.
Free, no obligation
Let's plan your last roof.
A free consultation on Zoom or at your home: we go through profiles and colours with you, measure the roof, and give you a fixed price in writing. No pressure, and an honest date for the install.
Interlock Metal Roofing (Alberta) Ltd. · 210, 3750 46 Ave SE, Calgary, AB
Lifetime refers to the manufacturer's Guardian Lifetime Limited Material Warranty: material and finish, for as long as the original purchaser owns the home, transferable once, workmanship excluded. Warranty details
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