Roof snow removal in Quebec: when to hire a pro, safety rules, and what to expect

Quebec roofs deal with some of the heaviest snow loads in North America. Every winter brings the same question for homeowners: is there too much snow up there, and should I do something about it? The answer depends on your roof type, the snow conditions, and whether you can do it safely.

This guide pulls together official guidance from the Regie du batiment du Quebec (RBQ), CAA-Quebec, and CNESST safety standards to help you make the right call.

When to worry about your roof

Under normal winter conditions, Quebec roofs are designed to handle typical snow accumulation. The Quebec Construction Code sets structural requirements based on regional weather patterns, roof slope, and building materials. That means a standard snowfall, even a heavy one, usually falls within your roof's design capacity.

But conditions turn dangerous after:

• Exceptional accumulation: a series of storms without melting in between can pile snow beyond normal parameters
• Rain on snow: a freezing rain event over thick accumulated snow dramatically increases the weight on your roof, because water is far heavier than dry snow
• Prolonged cold snaps: when temperatures stay well below zero for weeks, snow doesn't compact or melt, and each new storm adds to an already heavy load

According to CAA-Quebec, there's no universal "dangerous" depth. The threshold depends on your specific roof's design, age, and materials. That said, many roofing professionals suggest monitoring closely once snow depth exceeds 70 cm.

Warning signs of excessive snow load

The RBQ advises homeowners to evacuate and call a professional immediately if they notice:

• Unusual cracking or popping sounds from the ceiling or roof structure
• Doors or windows that suddenly stick or won't close properly
• Sagging ceilings or visibly bowed roof lines
• New cracks in drywall or interior walls
• Water infiltration or moisture stains appearing on ceilings

If you observe any of these signs, don't go on the roof. Get everyone out and contact a structural engineer or professional snow removal service.

Safety regulations for roof snow removal

CNESST requirements for work at heights

Quebec's workplace safety commission, the CNESST, sets mandatory safety standards for anyone working at heights above 3 metres:

• Workers must be attached to a fall arrest and restraint system
• Guardrails must be installed at roof edges, or workers must use alternative fall protection
• Warning lines must be installed at least 2 metres from any edge where a worker could fall
• A safety perimeter must be established on the ground around the building to protect pedestrians from falling snow and ice

These rules apply to professional contractors. If you hire a company for roof snow removal, they're legally required to follow CNESST protocols. The CNESST enforces a zero-tolerance policy for non-compliance, which can trigger work stoppages and prosecution.

RBQ licensing

The RBQ notes that no specific RBQ license is required for roof snow removal. Contractors must, however, demonstrate experience and proper equipment. This means there's no formal licensing barrier, which makes it especially important to verify that whoever you hire follows proper safety procedures.

Can you do it yourself?

For single-storey homes with accessible roofs, DIY snow removal is possible but comes with serious caveats:

From the ground (recommended)

A telescopic snow rake with a long handle lets you pull snow off the roof edges while standing safely on the ground. CAA-Quebec recommends using a wood or plastic rake to avoid damaging waterproofing membranes. Start from the eaves and work upward.

This approach works best for:

• Sloped roofs where snow slides toward the edges
• Single-storey homes
• Clearing the first metre or two from the eaves to prevent ice dams

On the roof (higher risk)

If you must go on the roof, the RBQ advises:

• Use a proper safety harness anchored to a secure point
• Have someone on the ground watching at all times
• Start from the top and work toward the bottom on sloped roofs
• Never work alone
• Never remove snow from inside a temporary car shelter (collapse risk)

When to hire a professional

Call a pro when your roof is:

• Flat: flat roofs accumulate snow evenly and require systematic clearing. The risk of membrane damage from improper technique is high.
• High: any roof more than one storey up is dangerous to access without professional equipment.
• Difficult to access: complex roof geometry, skylights, solar panels, or proximity to power lines all add risk.
• Showing warning signs: cracking, sagging, or sticking doors mean the structural situation may already be compromised.

The RBQ recommends entering into a snow removal contract at the start of winter, similar to how you'd contract for driveway plowing. Waiting until an emergency means paying premium rates and potentially waiting days for availability.

What professional removal involves

A reputable roof snow removal contractor will:

1. Assess the roof's condition and access points before starting
2. Establish a safety perimeter on the ground below
3. Use appropriate fall protection (harnesses, anchor points, guardrails)
4. Remove snow systematically without damaging the roof membrane
5. Clear drainage paths to prevent ice dam formation
6. Leave a thin layer of snow to protect the membrane (they won't scrape to bare surface)

Protecting your roof between removals

• Keep attic ventilation clear. Proper ventilation prevents warm air from melting snow on the underside of the roof, which creates ice dams.
• Check insulation levels. Inadequate insulation lets heat escape through the roof, contributing to uneven melting.
• Clear around vents and pipes. Snow blocking plumbing vents or exhaust pipes can cause serious problems.

Questions about winter property maintenance?

Montreal Paysagement Pro provides residential landscaping and seasonal maintenance guidance. Call 514-900-3867 for a free phone or video estimate.