About us
The Ontario team behind your last roof.
Interlock Metal Roofing (Ontario) Ltd. installs one roofing system, made in Canada, on homes in Toronto: 780 completed roofs so far, the first in 1998.
780
Completed roofs in Toronto
8,261
Completed Ontario roofs in our job book
4.8 ★
Across 1533 rated Ontario reviews
A+
BBB Accredited Business
2026
GuildQuality GuildMaster Award for service excellence
1998
Founded February 27 — Interlock Metal Roofing (Ontario) Ltd.
One product, one promise
We install one thing — and that focus is the point.
The Interlock® Lifetime Roofing System: interlocked aluminum panels made in Canada by Interlock Roofing. We are not a general roofing company that also offers metal. This system is all we do.
Ontario is hard on a roof in its own ways. Winters bring heavy snow and snow load, with lake-effect snow off Georgian Bay, Lake Huron and Lake Ontario, and months of freeze-thaw that open up cracks and lift shingles. Summers bring heat, humidity and hail. Aluminum absorbs nothing, is light on the framing, and locks on four sides with the fasteners covered. Ice dams come from heat escaping the attic and from ventilation, not from the roofing itself, so we look at insulation and venting with you before we quote. Every roof carries the manufacturer's Guardian Lifetime Limited Material Warranty, which transfers once when you sell.
Where we stand
One system, made in Canada, installed in Ontario since 1998
One system
We install the Interlock® Lifetime Roofing System and nothing else: aluminum panels made by Interlock Roofing, locked on all four edges and fastened out of the weather. Interlock Metal Roofing (Ontario) Ltd. is the certified Interlock® roofing contractor for Ontario.
Since 1998
Interlock Metal Roofing (Ontario) Ltd. was founded on February 27, 1998. Close to three decades of Ontario winters later, the company still installs one system, and the job book records every roof.
Made in Canada
The panels are manufactured by Interlock Roofing at its plant in Delta, BC. Made in Canada, installed in Ontario by our own company: the people who sell your roof, install it and answer for it are the same Ontario team.
Toronto since 1998
Our job book records 780 completed Interlock® roofs in Toronto, the first in 1998. Each one is recorded by town, profile, colour and year.
Across the province
From the GTA to London, Kitchener, Hamilton and Niagara, north to Barrie and Muskoka, and east through Peterborough and Kingston to Ottawa and Cornwall. Our busiest cities in the job book are Ottawa, Toronto and Mississauga.
Checkable
Ontario has no provincial licence for roofing contractors, so the checks that matter are WSIB coverage, liability insurance, a written contract and a warranty you can read in full. Ask us for all four, and ask any other roofer for the same. We hold municipal contractor licences in Toronto, Hamilton, Brantford and Halton Hills.
Credentials
Certified and accountable, in writing
Every claim on this page is checkable against a public record, a standards body, or the warranty document itself.
2026 GuildMaster Award for service excellence
Interlock Metal Roofing (Ontario) Ltd. won the 2026 GuildQuality GuildMaster Award for service excellence. GuildQuality surveys homeowners after the work is done, and the GuildMaster Award goes to contractors whose own customers rate their service highly. Most of the Ontario reviews on our reviews page come from those GuildQuality surveys.
Made in Canada, Canadian owned and operated
Every Interlock® panel we install is made in Canada by Interlock Roofing at 9969 River Way in Delta, BC. Interlock Metal Roofing (Ontario) Ltd. is a Canadian owned and operated Ontario company, founded February 27, 1998, with its office in Mississauga. Made in Canada, installed in Ontario by our own company.
BBB A+ and Baeumler Approved
Interlock Metal Roofing (Ontario) Ltd. has been a BBB Accredited Business since 2006, with an A+ rating, and is a Baeumler Approved contractor and a Metal Roofing Alliance member. The BBB profile is public and shows every complaint and response.
One certified product, described accurately
Aluminum with up to 95% recycled content, roughly 2 to 3.5 kg per square metre depending on profile, four-way interlocking panels with concealed fasteners, and the AAMA 2605 Alunar® coating system. Class A Fire Rated Available, as a complete assembly. Minimum 3/12 roof slope on every profile.
Our own proof, nobody else's
Every review on this site is from an Ontario homeowner, 1533 of them. Nothing is borrowed from another province or state to make the page look fuller. GuildQuality named Interlock Metal Roofing (Ontario) Ltd. a GuildMaster Award winner in 2025 and again in 2026.
A warranty that transfers
The manufacturer's Guardian Lifetime Limited Material Warranty covers material and finish for as long as the original purchaser owns the home, and transfers once. Workmanship is excluded. Read the terms and the exclusions before you sign; we'd rather you heard them from us.
Local line
One Mississauga office. One Ontario number.
2800 Argentia Rd #5, Mississauga, ON L5N 8L2. Mon–Fri, 9:00 AM to 5:00 PM. Sales visits by appointment, and most consultations can be done on Zoom. Call (416) 620-2174, or toll-free customer service on 1-866-733-5811.
FAQs
About us, answered directly
Do you install metal shingles and aluminum shingles in Toronto?
Yes. Four Interlock® profiles are interlocking aluminum shingles: Interlock® Slate, Interlock® Cedar Shingle, Interlock® Shake and Interlock® Mediterranean Tile. We also install Interlock® Standing Seam panels and solid copper. Every profile needs a roof slope of at least 3/12, and we confirm yours at the consultation.
Is metal roofing a good fit for Toronto's climate?
Toronto has a humid continental climate: summers can pass 35 °C with high humidity, and most winters bring mild stretches that melt the snow before it freezes again. The Annex station averages 121.5 cm of snow and 822.7 mm of precipitation a year (1991–2020 normals). Aluminum cannot rust and takes in no water, and Interlock panels are warranted to 193 km/h (120 mph) installed to manufacturer specification.
Who installs Interlock metal roofs in Ontario?
Interlock Metal Roofing (Ontario) Ltd., from 2800 Argentia Rd #5, Mississauga, ON L5N 8L2. We are the certified Interlock® roofing contractor for Ontario, founded in 1998.
Is Interlock Metal Roofing (Ontario) Ltd. the same company as the manufacturer?
No. Interlock Roofing manufactures the panels at its plant in Delta, BC and issues the Guardian material warranty. We are the Ontario company that sells and installs them, from our office in Mississauga.
Are roofers licensed in Ontario?
Ontario does not license roofing contractors provincially. What protects you is WSIB coverage (so an injury on your roof is not your liability), liability insurance, a municipal business licence where your city requires one, a written contract, and a warranty you can read. Ask for all of them.
Which parts of Ontario do you serve?
The GTA, Oakville, Mississauga, Markham and Barrie; Southwest Ontario (Chatham, London, Woodstock); Central-West (Kitchener, Guelph); the Niagara Peninsula (Hamilton, Simcoe, Niagara Falls); Muskoka (Gravenhurst, Huntsville); the Kawartha Lakes and Peterborough; Kingston and Belleville; and Eastern Ontario (Ottawa, Almonte, Cornwall).
Has Interlock Metal Roofing (Ontario) Ltd. won any awards?
Yes. Interlock Metal Roofing (Ontario) Ltd. won the 2026 GuildQuality GuildMaster Award for service excellence, which is based on surveys of the company's own customers. We are also a BBB Accredited Business with an A+ rating and a Baeumler Approved contractor.
Who manufactures the roofing you install?
Interlock Roofing, in Canada. The panels are aluminum with up to 95% recycled content, interlock on all four edges and carry the Alunar® coating system. The manufacturer publishes its test reports and certifications at interlockroofing.com.
Does a metal roof help with forest fire risk at the cottage?
It can be part of it. Class A Fire Rated Available, as a complete assembly (two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood, per ASTM E108; the Canadian standard is CAN/ULC-S107), and aluminum does not ignite. No roof is fireproof: embers get into gutters, vents and gaps at the roof edge, so the details around the roof matter as much as the panels.
Meet us on your roofline.
An on-site assessment, a fixed price in writing, and a straight answer about lead times before you commit to anything.
