Black Interlock aluminum slate metal roof on a single-storey ranch-style brick home in Cornwall, ON, featuring multiple roof louvers and a brick chimney.

Cornwall, ON · Lifetime Aluminum Roofing

Metal Roofing in Cornwall, Ontario

Interlock® installs lifetime aluminum metal roofing in Cornwall, ON — 60 roofs completed since 1998 by installation crews. Explore roofing profiles, local project evidence, and applicable limited warranty terms.

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Why Cornwall homeowners choose Interlock

Interlock Metal Roofing (Ontario) Ltd., founded on February 27, 1998, is a trusted metal roofing contractor and the exclusive authorized installer of Interlock® Lifetime Aluminum Roofing Systems serving homeowners in Cornwall, Ontario. We provide roof replacement and re-roofing across Cornwall, installing heavy-gauge, fire-resistant, energy-efficient cool roofs engineered for snow shedding and long-term protection—ideal for Cornwall’s heavy snowfall, freeze–thaw cycles and seasonal temperature swings. Interlock’s interlocking panels reduce ice-dam risk and withstand snow loads and high winds common in eastern Ontario, while the Alunar® Coating System delivers UV and corrosion resistance plus reflective “cool roof” benefits for lower summer attic temperatures. Choose the timeless look of slate, cedar shingles, shake, Mediterranean tile, or standing seam with the strength and longevity of metal—every Interlock roof in Cornwall is covered by the Alunar® Coating System and backed by a Lifetime Warranty.

60Roofs installed in Cornwall
1998First Cornwall installation
2024Most recent installation
15Verified local reviews

Roofing styles available in Cornwall

Explore five aluminum roofing profiles with the Alunar® coating system. Coverage and transfer provisions are subject to the applicable limited warranty terms.

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Interlock roofs we've installed in Cornwall

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Completed Interlock® metal roofs near Cornwall, ON

Interlock® has installed 60 lifetime aluminum metal roofs in Cornwall, Ontario, Canada since 1998. Every marker represents an anonymized project from our installation records. Explore verified installations across Cornwall, Ontario, Canada on the interactive project map and photo grid — filter by roof profile (Slate, Cedar Shingle, Shake, Mediterranean Tile and Standing Seam), colour and year of completion.

See completed Interlock® metal roofing projects across Cornwall, ON →

Open Cornwall, ON on the interactive project map →Browse the Interlock® project directory for Cornwall, ON →See more Interlock® projects →

What Cornwall homeowners say

★★★★★
Metal Shingles Cornwall, ON Review
Review: November 30, 2024Completion: June 17, 2024
Interlock Metal Roofing could improve their hiring. Interlock Metal Roofing sells roofs and a secondary party installs them. Whoever they hire to install the roofing should be either trained properly or there should be a higher standard held by the secondary group that does the installation.
Derek and Lisa H.Cornwall, ON
★★★★★
Metal Shingles Cornwall, ON Review
Review: August 16, 2024Completion: June 30, 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, ON
★★★★☆
Metal Shingles Cornwall, ON Review
Review: April 17, 2023Completion: March 21, 2023
As installation is recent, I'm not able to fully recommend as I don't know what long term will be like. More information online in order to better prepare myself / research on my own. Online information is mostly a sales pitch, give me details!
Brian B.Cornwall, ON
★★★★★
Aluminum Shingles Cornwall, ON Review
Review: September 15, 2022Completion: January 13, 2016
Fantastic service ... Brad and his team were on time, friendly, professional and extremely quick at installing additional snow guards to the metal roof we had installed a few years ago. Absolutely no issues at all ... these guys are a pleasure to deal with! Positive: Punctuality, Quality, Professionalism Services: Roof installation
Marc B.Cornwall, ON
★★★★★
Metal Shingles Cornwall, ON Review
Review: August 9, 2022Completion: June 13, 2022
I was very satisfied.
Daniel G.Cornwall, ON
★★★★★
Metal Shingles Cornwall, ON Review
Review: January 15, 2021Completion: December 16, 2020
Have more then one guy doing the install
Shawn R.Cornwall, ON