Two-storey red brick home in Markham ON with Interlock Musket Grey aluminum slate multi-hip roof, two chimneys, and attached garage.

Markham, ON · Lifetime Aluminum Roofing

Metal Roofing in Markham, Ontario

Interlock® installs lifetime aluminum metal roofing in Markham, ON — 64 roofs completed since 1998 by installation crews. Explore roofing profiles, local project evidence, and applicable limited warranty terms.

Call 416-620-2174 Get a Free Estimate

Why Markham homeowners choose Interlock

Interlock Metal Roofing (Ontario) Ltd., founded February 27, 1998, is a trusted metal roofing contractor and exclusive authorized installer of Interlock® Lifetime aluminum roofing systems serving homeowners in Markham, Ontario. Our Interlock Lifetime Roofing System is engineered for performance, beauty, and durability—offered as roof replacement and re-roofing solutions throughout Markham—featuring heavy-gauge, fire-resistant, energy-efficient cool-roof construction that sheds snow, helps reduce ice-dam formation, and endures freeze–thaw cycles and summer heat common to the region. Choose the timeless look of slate, cedar shingles, shake, Mediterranean tile, or standing seam with the strength of metal; every roof is protected by the Alunar® Coating System and backed by a Lifetime Warranty.

64Roofs installed in Markham
1998First Markham installation
2025Most recent installation
23Verified local reviews

Roofing styles available in Markham

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

Explore all Interlock metal roofing systems →

Interlock roofs we've installed in Markham

See all Markham project photos →

Completed Interlock® metal roofs near Markham, ON

Interlock® has installed 64 lifetime aluminum metal roofs in Markham, Ontario, Canada since 1998. Every marker represents an anonymized project from our installation records. Explore verified installations across Markham, 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 Markham, ON →

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

What Markham homeowners say

★★★★★
Metal Roofing Markham, ON Review 🇨🇦 — October 12, 2025 | Interlock®
Review: October 12, 2025Completion: September 30, 2025
Got the roof done a few weeks ago — John and CJ did an excellent job with the install. They went above and beyond helping me fix a vent issue we’d been dealing with. I went with the Musket Gray color, and I’m really happy with how the final product turned out. Highly recommend!
Marko P.Markham, ON
★★★★★
Metal Shingles Markham, ON Review 🇨🇦 — December 9, 2023 | Interlock®
Review: December 9, 2023Completion: October 19, 2023
Find my Google review and read about it. Although the project was a success in my opinion, a simple call back or answer to my email, from who I thought was most responsible for installation would have given you a perfect score. There was a breakdown in communication here. Communication workshops for staff to help improve their communication skills may help. Refer to my Google review.
Edward and Christine A.Markham, ON
★★★★☆
Metal Shingles Markham, ON Review 🇨🇦 — January 22, 2023 | Interlock®
Review: January 22, 2023Completion: December 7, 2022
It looks good. They did a good job. Possibly an earlier start time during the day Not at this time
Zoltan and Jeanette B.Markham, ON
★★★★☆
Metal Shingles Markham, ON Review 🇨🇦 — October 4, 2022 | Interlock®
Review: October 4, 2022Completion: July 7, 2022
Kevin Ng and Stephanie L.Markham, ON
★★★★★
Metal Shingles Markham, ON Review 🇨🇦 — April 8, 2022 | Interlock®
Review: April 8, 2022Completion: March 9, 2022
Great experience from the first meeting with Bruce and Brian to close the deal! Then the post installation set up with Tony and the installation with Wyman and his crew was amazing! Bruce and I kept in touch throughout the whole process. We cannot be happier with the purchase and the beautiful look of our new metal roof! Thank you, Arnaldo
Arnaldo Lalog and Onika H.Markham, ON
★★★★☆
Metal Shingles Markham, ON Review 🇨🇦 — October 25, 2021 | Interlock®
Review: October 25, 2021Completion: September 23, 2021
The installation took a long time. Their communication and upholding their promises is most important. The salesperson should clearly acknowledge those promises. They don't know what they are doing. They need to acknowledge their procedures on how they are going to do them and explain what materials they are going to use. The demolition is most important. If they are going to show up with an iPad, they should show me how they are going to install the product. I do not know if this would be the… Read more →
Gnana N.Markham, ON