When Repairs Aren’t Enough, It’s Time for a Flat Roof Replacement

Replacement cost depends on the system, the size of the roof, the condition of the existing deck and insulation, and the scope of tear-off required. Built-Up Roofing typically runs $12 to $18 per square foot installed, and Modified Bitumen runs $10 to $16 per square foot installed.

Every replacement is quoted as a fixed price after your free roof condition report, so you'll have an exact number before any work begins. For a deeper breakdown of how to plan and budget, see our guide to CapEx planning for roof replacement.

Most flat roof replacements wrap in 5 to 7 days, depending on the size of the building, the weather, and the complexity of the tear-off. Larger industrial roofs may run longer, and we'll give you an exact timeline with your fixed-price quote. Our crews work around your building's operations so tenants, production lines, and deliveries aren't affected during the install.

That depends on the condition of your existing system. If repairs are isolated, the insulation is dry, and the membrane has life left in it, we'll recommend a flat roof repair instead of a tear-off. If the damage is widespread, the insulation is saturated, or the roof is past its service life, a replacement is the only responsible call. We'll tell you honestly which one your building needs after the free roof condition report. Our blog on signs your flat roof needs immediate repair covers what to watch for.

Not always. If the existing insulation is dry, intact, and still performing, we can often reuse it under the new membrane and pass the savings on to you. If it's wet, compressed, or contaminated, replacement is the only responsible call because leaving it in place guarantees the new roof won't reach its full lifespan.

We assess the insulation during the free roof condition report and recommend reusing what's salvageable or replacing and upgrading the R-value where needed. For more on why insulation matters, see our article on R-value for flat roofs.

Every replacement comes with a workmanship warranty from Videl and a manufacturer warranty on the roofing system itself. Manufacturer warranties on BUR and Modified Bitumen systems typically run 20 to 30 years, depending on the specification. We walk you through both warranties before the work starts so you know exactly what's covered, for how long, and what triggers a claim. You'll receive the full warranty package and photo documentation at project close.

A replacement is a decision you live with for 25 years, so it's worth doing the due diligence. Look for a contractor with proven Ontario experience, manufacturer certifications, WSIB coverage, substantial liability insurance, and a documented track record of completed commercial projects. Our article on how to choose the right roofing company walks through the questions every property manager and owner should be asking before signing a quote.

Yes, and it's the single biggest factor in how long your new roof lasts. We build custom maintenance plans around your goals, whether you're budgeting for the next capital cycle, preparing a property for sale or refinancing, or simply trying to get the maximum service life out of the roof you just paid for. Scheduled inspections, documented history, and proactive repairs are what turn a 20-year roof into a 30-year roof, and the math on that difference lands directly in your favour.