We recently completed a sectional roof repair in Toronto for a commercial building located near Yonge and Finch. The existing flat roof featured a traditional 4-ply tar and gravel system that had developed isolated but significant problem areas. While much of the roof remained in good shape, several sections were showing signs of advanced deterioration — including surface cracks, water pooling, and active leaks. The building owner contacted us to perform a targeted solution that would restore the roof’s performance without a full replacement.

Step 1: Sectional Tear-Off and Assessment

As part of this sectional roof repair Toronto project, our team began by carefully removing only the damaged portions of the roofing system. This allowed us to maintain the still-intact areas while addressing the problem zones efficiently. During removal, we discovered rotted plywood decking caused by prolonged moisture exposure beneath the tar and gravel membrane.

Step 2: Plywood Deck Replacement

To rebuild the compromised structure, we removed the rotted deck materials and installed new pressure-treated plywood panels. These panels were fastened to meet current building code and provided a durable base for the restored roofing system. This repair step was essential to the success of this sectional roof repair in a busy commercial zone of North Toronto.

Step 3: Upgraded Insulation

Energy efficiency was also a concern. We installed 2 inches of rigid insulation over the repaired areas to improve year-round thermal performance. This helps keep the building cooler in summer and warmer in winter, while reducing energy bills. It was a valuable upgrade to the sectional roof repair Toronto project and added long-term value for the client.

Step 4: Restoring the Tar and Gravel System

We completed the repair by rebuilding the 4-ply BUR system over the affected areas using roofing felt and hot-applied asphalt. A fresh layer of protective gravel was installed on top to shield the roof from UV damage and mechanical wear. All penetrations and flashing components in the repaired areas were sealed and reinforced. The rest of the roof, still in good condition, was preserved to keep costs efficient and the structure intact.

Results That Last

This sectional roof repair in Toronto was completed on time and within budget. The project restored performance to the most critical areas of the roof while enhancing insulation and long-term durability. The client was extremely satisfied with both the repair quality and visual outcome.

If you’re looking for reliable commercial flat roof repair in Toronto, we specialize in sectional repairs, full restorations, and energy-efficient upgrades using tar and gravel, TPO, modified bitumen, and more.

📍 Location: Yonge and Finch, Toronto, ON
📸 View our before-and-after project videos below