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Commercial & Industrial Roofing

Commercial Roof Repair in Toronto & the GTA

An office roof leak never picks a good day. It shows up over a server room, a tenant's showroom, or a warehouse racking aisle, and suddenly the property manager has three phone calls going at once. The job at that moment is simple: stop the water, document the damage, and find out whether this is a one-off repair or the first sign of a membrane reaching the end of the line.

Tracing a commercial roof leak takes more patience than people expect. Water enters at a failed seam or flashing, travels along the vapour barrier or deck flutes, and drips through a ceiling tile thirty feet from where it got in. So the fix starts on the roof, not at the stain — walking the drains, curbs and seams, sometimes with a moisture scan, until the actual entry point is found. Patching where the drip appeared is how the same leak gets 'repaired' three times.

We quote plaza roof repair and warehouse roof repair as what they are: usually a modest, targeted job. You get the entry point identified, the repair priced, and a plain read on the rest of the roof while we are up there. If the membrane around the repair is on borrowed time, we will tell you — and if it is fine, we will tell you that too, so you are not talked into a replacement you do not need.

What this covers

  • Leak tracing from the roof surface — seams, flashings, drains and penetrations, not just the stain below
  • Emergency response to stop active water entry into tenant spaces
  • Membrane repairs on TPO, EPDM, modified bitumen and built-up roofs
  • Flashing repairs at HVAC curbs, parapets, vents and skylights
  • Clearing blocked roof drains and scuppers that are backing water up under the membrane
  • Sealing around new penetrations left behind by other trades
  • Photo documentation of cause and repair for owners, boards and insurance files
  • A condition note on the surrounding roof so one repair does not hide a bigger problem

What affects the price

  • How hard the leak is to trace — the entry point is often nowhere near where water shows inside
  • Membrane type; a heat-welded TPO patch, an EPDM repair and a torch-applied mod-bit patch are different jobs
  • Whether insulation under the leak is wet and needs cutting out and replacing
  • Roof access and height — a two-storey plaza and an eight-storey office are different set-ups
  • How many separate problem areas turn up once someone actually walks the whole roof
  • After-hours or emergency timing versus a scheduled visit
  • Winter conditions, which slow work and limit which repair materials can be used

Every home is different, so we don’t publish flat prices — the quote is free and based on your actual job.

Commercial Roof Repair near you

We take quote requests across the GTA. Local pages:

TorontoEtobicokeNorth YorkScarboroughEast YorkYorkMississaugaBramptonCaledonVaughanMarkhamRichmond HillAuroraNewmarketKingWhitchurch-StouffvilleEast GwillimburyGeorginaPickeringAjaxWhitbyOshawaClaringtonUxbridgeOakvilleBurlingtonMiltonHalton HillsHamiltonSt. CatharinesNiagara FallsGrimsbyNiagara-on-the-LakeBarrieInnisfilBradford West GwillimburyNew TecumsethKitchenerWaterlooCambridgeGuelphOrangeville

Common questions

Why does my commercial roof only leak during certain rains?
Direction and volume. A wind-driven rain from the east finds a lifted flashing that a straight-down summer rain never touches. Slow soaking rains overwhelm a partially blocked drain; short cloudbursts run off before ponding reaches the failed seam. This is normal and it is diagnostic — telling us exactly when the roof leaks helps us find where.
Is a repeated leak a sign we need a new roof?
Not by itself. The same leak returning usually means the previous repair missed the true entry point — common when someone patches below the stain instead of tracing the water. Different leaks in different places across an older roof is the pattern that points to replacement. The distinction matters, because one is a service call and the other is a capital project.
Can commercial roof repairs be done in winter?
Yes. Active leaks cannot wait for spring, and there are cold-weather methods — certain sealants, peel-and-stick membranes and mechanical fixes — that hold reliably in freezing conditions. Some winter repairs are staged: a durable temporary fix now, with the permanent welded or torched repair completed in warm weather. Either way the water stops now.
Who is responsible for roof repairs — landlord or tenant?
That is set by the lease, not by the roofer. In most GTA net leases the structure and roof remain the landlord's responsibility, sometimes with costs flowed back through CAM charges; some single-tenant industrial leases push repairs onto the tenant. Our part is documenting cause and repair clearly with photos, which is what both sides need when the lease question comes up.
How fast can someone get to a leaking commercial roof?
For active leaks over occupied space we treat it as urgent — typically same day or next day depending on weather and location in the GTA. The first visit stops the water and protects the interior; if a full repair needs materials or dry conditions, it gets scheduled immediately after. Meanwhile you have photos and a written account for your records.

Ready to sort out your commercial roof repair?

Tell us what your roof needs — one small repair or a complete replacement — and get a free quote.

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