Flat & commercial roofing done right

Cost varies by measurable factors: roof area and complexity, the membrane chosen (TPO, EPDM, modified bitumen, or built-up), insulation type and thickness, access constraints, and whether the deck or insulation is wet and needs replacement. Labour intensity—rooftop staging, curb protection, traffic control and crane time—also affects price, as do seasonal timing and permit requirements. We inspect and provide a written email quote with line-item choices so you know what’s included and what potential add-ons could appear once we open assemblies.

Decide whether you want a short-term patch or a long-term replacement. For limited seam failures or single leaks, targeted repairs or membrane patching can be cost-effective; for multiple failing seams, saturated insulation, or recurring ponding, a full replacement is usually the more durable and economical choice over time.

Toronto winters limit torch work and make adhesives and seam welding trickier; spring and summer are better for full replacements. For emergency repairs in winter we use cold-applied or temporary solutions, then schedule a permanent replacement when conditions are right.

Delaying minor repairs may be fine in the short term if the assembly is sound, but postponing work after interior signs appear risks insulation and deck damage. Budgeting for planned replacement during warmer months is often cheaper than emergency winter work.

TPO and EPDM are single-ply options with different trade-offs—TPO welds for long seam integrity and reflects heat; EPDM is resilient and easier to patch. Modified bitumen offers a robust, multi-layer approach and works well on parapet details; the choice depends on slope, rooftop equipment and life-cycle priorities.

Expect crew access, staged materials and some noise while membrane work happens; we plan protection for landscaping and limit rooftop foot traffic to essential tasks. For commercial sites we coordinate deliveries and access to minimize business disruption and keep pedestrian routes clear.

Most full replacements or drainage rework need to meet local building code and sometimes require permits in Toronto and bordering municipalities. We flag code items in the quote and can advise when a permit submission or engineering memo will be required—sometimes a repair avoids permit triggers, which is an important trade-off to weigh.

Costs depend on roof size, membrane type (TPO, EPDM, modified bitumen), insulation and whether the deck or insulation is wet. Access complexity, required drainage upgrades and municipal permit needs also affect price. We perform an inspection and email a line-item written quote so you can compare material and scope choices.

A small repair can be a day; a full replacement on a medium commercial roof can take several days to a few weeks depending on deck prep, insulation removal and weather. Scheduling, crane access, and permit timelines in Toronto neighbourhoods like the Junction or Rosedale also influence the calendar.

TPO welds provide strong sealed seams and reflective properties; EPDM is durable and easy to patch; modified bitumen is robust at terminations and parapets. Choice depends on roof geometry, rooftop equipment and whether you need a reflective or more repairable system.

Major replacements, structural repairs, or changes to drainage commonly require permits in Toronto and sometimes in nearby Mississauga or Vaughan. We flag permit needs in the quote and can coordinate with engineers or the permit office where required.

We document workmanship coverage for flashing and installation items in the scope and provide manufacturer warranty paperwork where applicable. Warranties vary by membrane and manufacturer; we explain what workmanship and material coverage each option includes.

Clear rooftop access and remove loose rooftop items where possible; notify tenants and mark out HVAC or antennas that must stay. We advise on pedestrian protection and delivery windows for your Toronto neighbourhood so day-to-day operations are disturbed as little as possible.

Quotes differ because of scope detail, membrane selection, insulation allowances, assumptions about substrate condition and how thorough the contractor’s inspection is. A low bid may omit substrate prep or proper drainage work—our written line-item quotes make those differences visible so you can decide.