Can you repair a flat roof without shutting down my business?

In most cases, yes. We section off the work area, schedule noisy tasks outside operating hours, and keep entries and HVAC intakes protected. Most projects are completed with zero downtime.

My flat roof is 20 years old — repair or replace?

It depends on membrane type and condition. We core-sample the roof, check insulation for moisture, and recommend honestly. A silicone coating can add 10+ years; saturated insulation usually means replacement is better value.

Do you offer preventative maintenance contracts?

Yes. Annual or semi-annual inspection plans catch small issues before they cause interior damage. Most clients find a maintenance plan pays for itself within the first year.

Will you provide documentation for our insurer and board?

Always — you receive a full condition report with photos, manufacturer warranty registration, an as-built roof plan, and our workmanship warranty certificate.

Do you handle roof insurance claims for storm damage?

Yes. We document damage, provide a written scope of work, and coordinate with your commercial insurer's adjuster to streamline the claim.

Commercial Roofing Oshawa | TPO, EPDM & Torch-On Flat Roof Experts

A leaking commercial flat roof can shut down operations, damage inventory, and create slip-and-liability hazards. Oshawa Roofing works with property owners, facility managers, and commercial landlords across Durham Region to deliver fast flat roof solutions that protect the bottom line.

Commercial Flat Roof Systems We Install & Repair

We work with all major low-slope and flat roof systems used on Oshawa's commercial buildings. Each has its strengths — we help you choose the right one for your building's use, budget, and roof access needs.

TPO (Thermoplastic Polyolefin): White reflective single-ply that cuts cooling costs in summer — ideal for retail plazas and warehouses with large roof areas.
EPDM Rubber: Durable black single-ply membrane, flexible in cold, proven 25–30+ year lifespan on industrial buildings.
Modified Bitumen (Torch-On): Multi-ply asphalt system — heavy-duty, impact-resistant, common on older Oshawa commercial buildings and restaurants.
Built-Up Roofing (BUR): Traditional tar-and-gravel, repaired and maintained for legacy flat roofs.
Roof Coatings (Elastomeric/Silicone): Seamless, cost-effective restoration that extends an existing flat roof's life by 10+ years without a full tear-off.

Got a flat roof leak at your business?

We respond fast to commercial emergencies across Durham Region — before stock or ceilings are damaged.

24/7 Emergency Response

Types of Oshawa Commercial Buildings We Service

Retail plazas and strip malls
Warehouses and distribution facilities
Office buildings & professional suites
Restaurants and food-service (grease/vent rooftop)
Auto dealerships and service bays
Industrial and manufacturing facilities
Multi-residential apartment and condo buildings
Churches, schools, and community facilities

Our Commercial Roofing Process

1. Detailed Roof Survey & Report

We inspect the entire roof surface, identify every leak source, core-sample the membrane where needed, and document the condition of flashings, drains, and penetrations. You receive a photo-rich condition report and an honest recommendation: repair, restore, or replace.

2. Transparent Capital Planning Quote

Commercial roofs are capital investments. We provide itemized pricing for each option (repair / restore / replace), expected lifespan, and lifecycle cost — so you can present a defensible plan to ownership or your board.

3. Minimal-Disruption Installation

We schedule around your business hours where possible, section off work zones, protect HVAC intakes and pedestrian areas, and keep entrances safe. Your operations keep running.

4. Documentation & Warranty

On completion you receive manufacturer warranty registration, photos of every detail, an as-built roof plan, and our workmanship guarantee — everything you need for future maintenance planning and insurance.

Signs Your Commercial Flat Roof Needs Attention

Standing water that doesn't drain within 48 hours after rain.
Bubbling or blistering in the membrane — trapped moisture underneath.
Cracked or split seams where the membrane has pulled apart.
Interior ceiling stains or musty smells in the building.
Membrane shrinkage pulling away from parapets and curbs.
Roof age 15+ years on EPDM, or 20+ on BUR/torch-on systems.
Rising energy bills — a failing roof loses its insulating value.

Commercial Roofing Cost in Oshawa

Commercial flat roof pricing in Durham Region is typically quoted per square foot and depends on the system, insulation upgrades, number of penetrations, and roof access. Typical 2026 ranges:

Targeted flat roof repair: $600 – $3,500 depending on size and system
Silicone / elastomeric roof coating (restore): $4 – $8 per sq. ft.
TPO membrane full installation: $9 – $15 per sq. ft.
EPDM rubber full installation: $8 – $13 per sq. ft.
Modified bitumen (torch-on) installation: $9 – $16 per sq. ft.
Tear-off & disposal (existing roof): $2 – $5 per sq. ft. per layer

Free commercial roof inspections and quotes — we serve Oshawa, Whitby, Ajax, Pickering, Bowmanville, and the wider Durham Region.

Why Oshawa Businesses Choose Us

Commercial experience: 15+ years installing and maintaining flat roofs on Durham Region businesses.
$2M liability + WSIB clearance: Full commercial insurance documentation available for your file.
Manufacturer-certified installations: Warranty-backed TPO, EPDM, and mod-bit systems.
Preventative maintenance plans: Annual inspections catch small issues before they shut down operations.
Emergency response: Rapid tarping and temporary sealants during storms and freezes.
Clear documentation: Detailed reports your insurer, board, and facility manager will actually understand.

Commercial Roofing Oshawa — Flat Roof Systems Built for Ontario Businesses