Ontario’s Commercial Flat Roof Contractors

High tenant turnover means HVAC units get added, removed, and relocated without proper flashing — and every change leaves the membrane exposed.

Tenant-installed signage and equipment often punctures the membrane without proper sealing

Multiple HVAC units create concentrated stress zones and drainage obstructions

Ponding water collects around improperly flashed curbs and drains between units

Office buildings depend on consistent climate control and clean, dry interiors. A single roof leak can damage suspended ceilings, disrupt electrical systems, and trigger tenant complaints that escalate fast.

Rooftop HVAC units vibrate constantly, loosening flashing and creating micro-tears in the membrane

Clogged or undersized drains cause water to pond, adding weight and accelerating deterioration

Elevator shaft penetrations are common leak points that often go undetected until interior damage appears

A roof failure overhead can cascade through multiple units, damaging drywall, flooring, and personal property — and creating liability exposure for the building owner.

Rooftop vents, pipes, and mechanical penetrations deteriorate faster than the surrounding membrane

Interior leaks often appear far from the actual roof failure, making diagnosis difficult without professional assessment

Insurance claims require documented roof condition history that most buildings don't have until it's too late

Large, open-span roofs are exposed to significant thermal movement, heavy equipment loads, and limited drainage slope. Small problems on these buildings become expensive ones fast.

Rooftop units on warehouse roofs are often oversized and under-flashed

Dock door areas create thermal breaks where condensation and ice damage the membrane edge

A single leak over stored inventory or equipment can generate losses far exceeding the cost of the roof repair

Targeted repairs for membrane splits, failed flashings, and seam separations on commercial properties. We trace every leak to its source and fix the root cause, not just the visible symptom.

Full roof system replacements built for long-term performance. From insulation to membrane, every layer is specified for your building's structure, use, and climate exposure.

Water coming through the ceiling at your plaza or office building? Our emergency crew responds within 90 minutes to contain the damage, protect interior assets, and stabilize the roof.

Every HVAC curb, vent stack, drain, and skylight is a potential failure point on a commercial roof. We flash, seal, and reinforce each penetration to prevent leaks and protect the surrounding membrane.

Multi-tenant buildings and complex roof layouts can be to assess from the ground. Our drones capture full-roof imagery and infrared thermal scans to flag moisture, membrane damage, and failure points before they turn into tenant complaints.

Cracked lenses, failed seals, and deteriorating curb flashing make skylights one of the most common leak sources on commercial roofs. We repair or replace skylights and reinforce the surrounding membrane to stop water intrusion at the curb.