Flat Roof vs. Sloped Roof—Which Is Better for Your Home?
— A Practical Guide from Metro Roof
As roofing professionals serving the Greater Toronto Area for years, one question we hear all the time is:
“Do I need a permit to replace my roof?”
Short answer? Not always—but when you do, it’s critical to get it right.
Let’s break it down.
🧾 When You DON’T Need a Permit
For most standard roof replacements—like removing old shingles and installing new ones—you typically don’t need a building permit in Toronto, as long as:
✅ You’re not changing the structure of the roof (rafters, framing, etc.)
✅ You’re not exceeding code limits for material layers (e.g., more than 2 layers of shingles)
✅ You’re not installing heavy materials that impact load-bearing (e.g., tile, slate)
✅ The building use isn’t changing (e.g., converting attic to living space)
In most residential cases, asphalt-to-asphalt re-roofing can proceed without city approval—as long as the contractor follows Ontario Building Code standards.
🏡 At Metro Roof, we install, maintain, and repair both types. Let’s help you choose the one that matches your building’s needs—and your budget.
💬 Contact us anytime for a no-obligation consultation.
