Ontario's Best Roof® · Made in Canada · Since 1998
The certified Interlock® roofing contractor for Ontario.
On Zoom or at your home, at a time that suits you. Most homeowners choose Zoom. You get a fixed price in writing.
The collection
Also offered in solid copper.
Compare them side by side
The Interlock® Lifetime Roofing System installer for Ontario
Manufactured at 9969 River Way, Delta, BC
GuildQuality GuildMaster Award for service excellence
Better Business Bureau rating
Baeumler Approved
Approved contractor profileBuilt for Ontario
Ontario is lake-effect snow, freeze-thaw, wind and humid summers, sometimes in the same year. Here is what an Interlock® aluminum roof does about each.
Snow
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 Ontario winter puts on it: snow. Smooth aluminum lets snow slide, so we plan snow guards over entries, walkways and the driveway at the quote.
Freeze-thaw
Years of freezing and thawing loosen asphalt granules and curl shingles; cedar takes on water that freezes in the grain. Aluminum absorbs nothing and cannot rust. It forms its own thin oxide layer, which re-forms if the surface is scratched.
Ice dams
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.
Wind
Interlock panels lock to each other on all four sides, with no exposed fastener for a storm to work at. Wind resistance is warranted to 193 km/h (120 mph) installed to manufacturer specification.
Cool roof
Most Alunar® colours are rated by the Cool Roof Rating Council (CRRC), which publishes each colour's solar reflectance (0.25 to 0.44 when new) and thermal emittance (0.83 to 0.86). Lighter and metallic colours reflect more. The Alunar® finish is warranted for 30 years.
Solar
A solar array lasts 25 to 30 years. On an asphalt roof the panels often have to come off and go back on when the roof wears out underneath them. On an Interlock roof they come off at the end of their own life, not the roof's. Your solar installer confirms the framing and the mounting hardware.
Toronto, Mississauga, Brampton, Oakville, Markham and Durham: older homes, tight lots, condo and townhouse boards, and summers that cook an attic.
Lighter colours reflect more of the summer sun; how much that saves depends on climate, colour, insulation and ventilation.
One profile and colour across every unit, with the product documents and warranty terms a board asks for.
The look of slate or cedar shake on a postwar bungalow or a century home, at a fraction of the weight.
Put the panels up once. The roof under them outlives the array.
Ottawa, Almonte and Cornwall: long, cold winters, heavy snow and a deep freeze.
Light on the framing, so the structure's capacity goes to the snow, not the roof.
We plan snow guards over entries, walkways and the driveway at the quote.
Nothing in an aluminum panel to crack, curl or take on water.
They start in the attic. We look at insulation and ventilation with you at the estimate.
Kingston, Belleville and Prince Edward County: wind off Lake Ontario, waterfront homes and hard winters.
Panels locked on four sides; wind warranted to 193 km/h installed to manufacturer specification.
Aluminum cannot rust, on the lake or off it.
The look of slate without the weight of slate.
Nothing to crack, curl or soak up water.
Muskoka, Gravenhurst, Huntsville and Parry Sound: cottages in the trees, heavy snow and dry summers.
Class A Fire Rated Available, as a complete assembly; aluminum does not ignite.
Nothing in the panel to rot. Valleys and gutters still collect needles, so we tell you what to clear and how often.
Light on older cottage framing, with snow guards planned at the quote.
Aluminum cannot rust.
Kawartha Lakes and Peterborough: lake country, cottages and properties with more than one roof.
One profile and colour across every building on the property.
Light under snow, locked on four sides against wind.
Class A Fire Rated Available, as a complete assembly.
Nothing to crack, curl or soak up water.
Hamilton, Niagara and Norfolk: wind along the escarpment and long, humid summers.
Panels locked on four sides; wind warranted to 193 km/h installed to manufacturer specification.
Lighter colours reflect more of the summer sun; how much that saves depends on climate, colour, insulation and ventilation.
The look of slate or cedar shake at a fraction of the weight.
Concealed fasteners and no granules to knock loose.
Kitchener, Waterloo, Cambridge and Guelph: real snow belt winters and hot summers.
Light on the framing under snow, with snow guards planned at the quote.
A reflective finish in every colour keeps the attic cooler; actual savings vary.
Nothing to crack, curl or soak up water.
They start in the attic. We look at insulation and ventilation with you.
London, Sarnia, Woodstock, Chatham and Windsor: squalls off Lake Huron, long hot summers in the south, and open-country wind.
Light under snow; snow guards planned at the quote.
Lighter colours reflect more of the summer sun; how much that saves depends on climate, colour, insulation and ventilation.
Panels locked on four sides; wind warranted to 193 km/h installed to manufacturer specification.
One profile and colour across every building on the farm.
Product figures are the manufacturer's: interlockroofing.com ↗
Homes and beyond
The same interlocking aluminum system goes on a family home, a condo or townhouse complex, or a church. We install it across Ontario on:
Antarctica · U.S. National Science Foundation
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.
The Antarctica project ↗Recent roofs in Ontario
Tap a roof to see every photo full screen. Save the ones you like, send them to family, or pick two to four to compare side by side.
SlateSudbury, Ontario · July 2026
ShingleBeaverton, Ontario · September 2025
SlateOshawa, Ontario · August 2025
SlateScarborough, Ontario · July 2025
SlateBloomfield, Ontario · June 2025
Standing SeamMississauga, Ontario · September 2024
SlateMississauga, Ontario · May 2024
Mediterranean TileEtobicoke, Ontario · April 2024
SlateMississauga, Ontario · October 2023
In their own words
★★★★★
“Excellent Service, so happy with the work and the support. Brad provide a great inspection after sale to ensure installation was done properly.”
Pegah D. · Ottawa · 2026
See this roof 1 photo · Colonial Brown Slate★★★★★
“Experienced installer in steel roofing -Was able to add more snow guards with no issues thanks!”
Silvia M. · Guelph · 2026
★★★★★
“Brad was awesome. What a trooper. Great workmanship and wonderful personality. He is the an awesome person. Great company too. Highly recommend it.”
Colomba V. · Pickering · 2026
★★★★★
“We have had our second house done and the service is great. We are very happy with the work. Would recommend this company.”
Lynne A. · Russell · 2026
★★★★★
“Ken did a great repair, he had all the materials and tools, the repair was quick and looks great. Ken was polite and professional.”
Gail S. · Barrie · 2026
★★★★★
“The only metal roof you will ever need. By far, the best metal roofing company in North America.”
Bradley C. · Innisfil · 2025
★★★★★
“Ken is perfect guy really great personality , great service. Really recommend and thank you Ken”
Arash A. · Barrie · 2025
★★★★★
“Bruce was knowledgeable and responsive, and followed up after the job to ensure it was done right. Moses and the crew were meticulous and kept the site clean and organized—great experience from start to finish.”
Vanessa R. · East York · 2025
See this roof 3 photos · Black Slate★★★★★
“Ken came to the house arrived early. And he fixed our leek, very courses and was very good at his job.”
Ed L. · Bolton · 2025
★★★★★
“Great product! Have put it on 2 of our houses. Would highly recommend it.”
Christy B. · Waterloo · 2024
★★★★★
“It was a great experience from the beginning. Bruce and the installation team were great; they explained everything really well, and we are very happy with our great new roof!”
Tobias B. · Ancaster · 2024
★★★★★
“The installation crew that did the job was not impressive. I went up on the roof when they were done, and I had to call them back because it was a terrible job.”
Patrick and Julie S. · Cornwall · 2024
★★★★★
“Bruce from Interlock Industries came to the house the day after I asked for estimate and four weeks later we had our new roof! Steve was incredible.”
Frits and Els V. · Sundridge · 2024
★★★★★
“The product is excellent the installer was a true craftsman but it took a lot longer to install than I thought but in the end I would highly recommend it. Just communication with the timeline of installation”
Rob and Tracy G. · Etobicoke · 2024
★★★★★
“We wanted some extra roof ice breakers installed on our roof. The men were super friendly and did a wonderful job”
Olivia J. · Stittsville · 2026
★★★★★
“Bruce walked me through the process of the installation process for the aluminum roof and gave me an estimate. Steve the installer did a good job, I am happy with my new aluminum roof.”
Daniel C. · Brampton · 2026
★★★★★
“That's the second time I have called the company for a project, so it is because we are very happy with everything.”
Carolyne C. · Grimsby · 2026
★★★★★
“We moved into our new house in 1984. Our new house came with new 25 year shingles. In 2004, 20 years later we noticed that our roof shingles needed to be redone... We highly recommend Interlock Metal Roofing.”
Dan S. · Aurora · 2026
★★★★★
“Great job by the team to remove old roof and install new one. New roof looks great.”
James P. · Oshawa · 2025
See this roof 3 photos · Copper Penny Slate★★★★★
“Definitely. We saw one of your roofs that had been installed at least 25 years ago, and it still looks great. So, you have a great product and would definitely recommend you to anyone we know is thinking of a metal roof.”
Elizabeth and Kenneth L. · Welland · 2025
★★★★★
“I just had my roof done by Interlock Industries (Ontario) Inc. I was " EXTREMELY SATISFIED" starting from the sales person to the installers. I found them very professional.”
Denis P. · Collingwood · 2025
See this roof 3 photos · Deep Charcoal Slate★★★★★
“The 22 year old shingles were blowing off so instead of re-shingling it was time for something more permanent. Enter Interlock Metal Roofing (Ontario) Ltd. Bruce Mehuys came and measured the roof.”
Viggo D. · Scarborough · 2025
See this roof 2 photos · Musket Grey Slate★★★★★
“Great roof, looks good. Bruce Mehuys, our sales person, was very professional, knowledgeable, and answered all our questions or concerns. the installers did a good job. Overall I am very pleased with our Interlock Roof.”
James M. · Wasaga Beach · 2025
See this roof 7 photos · Deep Charcoal Cedar Shingle★★★★★
“It was a positive and great experience. The roof looks great. I'm glad I went with it.”
North York St.Timothy P. · Toronto · 2024
★★★★★
“Brad was awesome friendly and professional. The snow guards look great”
Carol W. · Cambridge · 2024
★★★★★
“Purchased roof from Bruce M and was impressed with his product knowledge and approach. Installation was done on schedule and the finished product looks good .”
Jim P. · Etobicoke · 2024
★★★★★
“Brad's workmanship skills saved the day. Nice work and pleasing to the eye. Would recommend.”
Derek H. · Cornwall · 2024
See this roof 3 photos · Black Slate★★★★★
“The roof looks great. The installers did a good job. They were very friendly and helpful. It was a very positive experience.”
Peter Ware and Lynn H. · North York · 2023
The collection
The look belongs to your home. The performance belongs to the metal. Every profile needs a minimum 3/12 roof slope.
A composed silhouette
The formal character of slate at a fraction of the weight, in aluminum that cannot rust.
Familiar warmth
The look of a cedar roof, with nothing to rot, split or take on water in the grain.
Deep shadow lines
Hand-split texture and depth: the usual replacement when a cedar shake roof has had its last re-treatment.
Sculpted, not heavy
The barrel-tile silhouette without the weight of concrete or clay.
Clean lines
Clean vertical lines for a modern home or a cabin, in the same aluminum.
A living metal
Copper weathers over time. Usually a bay, a porch or a turret rather than a whole house.
Where we've worked
We install the Interlock® aluminum roofing system on Ontario homes, cottages and condo and townhouse complexes: 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 Ontario company from our office in Mississauga.
Completed Interlock® roofs by community, from our job book. Each community with three or more has its own page.
These are the regions we currently serve. Not sure which one your address falls in? Ask us.
The project map
Every pin is a real, completed Interlock® roof with its profile, colour and install year. Zoom in on your street.
Why this system, in Ontario
Asphalt in Ontario
Freeze-thaw, summer heat and wind work on asphalt shingles every year: granules loosen, edges curl and tabs lift. An Interlock roof has no granules to lose and no tabs to lift, and its panels lock to each other on all four sides.
Older homes
Interlock's Slate, Cedar Shingle and Shake profiles keep the look on a century home, a postwar bungalow or a cottage at roughly 2 to 3.5 kg per square metre, a fraction of concrete tile or natural slate.
Snow
Smooth aluminum lets snow slide rather than sit. We plan snow guards over entries, walkways, decks and the driveway at the quote, so it comes off where it should.
One company
We install every roof ourselves. The manufacturer's Guardian Lifetime Limited Material Warranty and our 10 year labour warranty come with it, and our service team is in Ontario.
Recycled
And the last tear-off your house is likely to need.
The metallurgy, coatings and test reports are the manufacturer's to explain: interlockroofing.com ↗
Every Interlock® panel we install is manufactured in Canada by Interlock Roofing at its plant at 9969 River Way in Delta, BC.
Interlock Metal Roofing (Ontario) Ltd. was founded in 1998 and is based in Mississauga. Canadian owned and operated for 28 years.
The roof is made in Canada and installed in Ontario by our own company. It never crosses a border on its way to your home.
Upcoming shows
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 Ontario, installing Interlock® roofs since 1998 from our office at 2800 Argentia Rd #5 in Mississauga. We install one roofing system, the Interlock® aluminum roof, made in Canada by Interlock Roofing at its plant in Delta, BC, and installed in Ontario by our own company. We are BBB Accredited with an A+ rating, Baeumler Approved, a Metal Roofing Alliance member and a GuildQuality GuildMaster Award winner in 2025 and 2026.
Five aluminum profiles (Slate, Cedar Shingle, Shake, Mediterranean Tile and Standing Seam), also available in solid copper. Slate is the profile we sell most, and Shake and Cedar Shingle are the usual choice when an owner wants to keep the look of a wood roof. Every profile needs a minimum 3/12 roof slope. We bring samples to the consultation so you can see each one against your house.
Class A is the highest fire classification for roof coverings under ASTM E108, and it rates a complete roof assembly rather than a covering alone; in Canada the matching standard is CAN/ULC-S107. The roof covering, underlayment and deck are tested together, which is why the same panel can carry different classifications on different assemblies. On our roofs, Class A Fire Rated Available, as a complete assembly: two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood, per ASTM E108. When a roofer says their roof is Class A, ask which assembly the rating applies to.
Two. The manufacturer, Interlock Roofing, gives the Guardian Lifetime Limited Material Warranty on the aluminum material and its factory finish. We, Interlock Metal Roofing (Ontario) Ltd., give a 10 Year Limited Labour Warranty on the workmanship of the installation. They are separate documents with separate terms, and you can read both in full before you buy.
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 is under the old roof, the profile you choose, and options such as the Class A Fire Rated Available assembly, snow guards or hidden gutters. Steep lots and hard-to-reach cottage sites change the logistics too. You get a fixed price in writing, and anything the deck needs goes into that quote, not into a change order later.
We take work across southern, central and eastern Ontario: the GTA, including Toronto, Mississauga, Oakville and Markham, and Barrie; Kitchener and Guelph; Hamilton, Simcoe and Niagara Falls; London, Woodstock and Chatham; Muskoka, Gravenhurst and Huntsville; Kawartha Lakes and Peterborough; Kingston and Belleville; and Ottawa, Almonte and Cornwall. It is the same company and the same warranties everywhere. We don't regularly serve Northern Ontario, but we consider projects there case by case, so ask.
Free, no obligation
A free consultation on Zoom (most homeowners choose it) 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 (Ontario) Ltd. · 2800 Argentia Rd #5, Mississauga, ON
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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