The Commercial Flat Roof Maintenance Calendar for Gatineau
Spring (April): Full surface inspection for winter damage; clear all drains and scuppers; inspect all flashings and penetrations; repair any seam separations found. Summer: Inspect after major hailstorms; ensure rooftop HVAC and equipment areas are clean and sealed. Fall (October): Repeat surface inspection; clear drains before freeze-up; address any repairs before winter. Winter: Monitor snow accumulation on large flat roofs; arrange professional removal if loads approach design thresholds.
Drain Maintenance: The Most Important Routine Task
Blocked drains are the single most preventable cause of commercial flat roof failure in the Outaouais. Leaf matter, gravel displacement, and debris accumulate at drains and scuppers every season. A drain blocked before winter becomes an ice dam at the drain point — damaging the membrane and frequently requiring emergency repair. Clear all drains in October and again in April, minimum.
Flashing and Penetration Checks
Commercial roofs have more penetrations than residential — HVAC curbs, multiple plumbing stacks, electrical conduits, skylights, and rooftop equipment pads. Each is a potential failure point as caulking ages and thermal cycling loosens seals. Cossette’s commercial maintenance inspections check every penetration and renew sealants as required.
When to Call Cossette for a Commercial Emergency in Gatineau
Call 819-777-7177 immediately if: water is actively entering the building; a major weather event has caused visible damage; a roof drain is completely blocked and water is ponding more than 15 cm; or snow accumulation appears to be exceeding the building’s design load. Cossette’s 24/7 emergency line is available 365 days a year.
Frequently Asked Questions
How much does commercial flat roof maintenance cost in Gatineau?
Routine biannual inspection and drain clearing for a commercial building in Gatineau typically costs $300–$800 depending on roof size and access complexity. Preventive maintenance costs a fraction of emergency repairs — most commercial property managers find a maintenance contract cost-effective.
Does Cossette offer maintenance contracts for commercial roofs in Ottawa?
Yes. Cossette provides maintenance agreements for commercial clients in Ottawa, Gatineau, and the Outaouais. Contact info@toiturescossette.ca or call 819-777-7177 to discuss a maintenance programme tailored to your building.
How does professional snow removal work on a commercial flat roof?
Cossette’s team uses non-abrasive tools (plastic shovels, foam-tipped scrapers) to remove snow while leaving a protective buffer layer above the membrane surface. Metal tools and aggressive scraping damage the cap sheet and create new failure points. Professional removal is always recommended over DIY attempts.