Roof Repair in Saguenay: Three Metres of Snow, Roofs That Must Be Cleared, and What the RBQ Requires

Snow load: when clearing is necessary

Quebec’s building code sets a design snow load for Saguenay well above Montreal’s, and roofs built to it carry a normal winter. The danger is the abnormal one: a wet March snowfall on top of a deep pack, or rain on snow, which can double the weight in a day. Flat and low-slope roofs on apartment blocks, garages, rear additions and the commercial strips are where it matters; a steep roof that sheds does not need clearing and is damaged by it. The Régie du bâtiment publishes warnings in heavy winters, and the signs of a roof in trouble are doors that stick, new cracks in the ceiling or drywall, creaking, and a visible sag.

Roof clearing is a trade in Saguenay, and it kills people who do it without fall protection. A company doing it should be registered with the CNESST and carry liability insurance; ask for both.

Ice dams and the attic

An ice dam leak appears days into a cold spell, at the top of an exterior wall or around a window head, with thick icicles and a band of ice along the eaves outside. A roof leak appears in the thaw or in rain, below a valley, a chimney or a vent, in the same place each time. The first is fixed in the attic: air sealing around pot lights, the hatch and plumbing stacks, insulation to the level the code now asks for, and ventilation that keeps the roof deck cold. A bathroom fan venting into the attic instead of outside is the most common single cause in Saguenay’s bungalows. If a dam is actively leaking, a professional steam removal clears channels through it without damaging the shingles; chipping and salt shorten the roof’s life.

• Photos of icicles, the ice band and any interior stain
• Attic insulation depth and any gaps
• Bathroom and kitchen fans confirmed vented outside
• Soffit and roof ventilation present and clear
• Flat roof: drains clear, ponding noted

What a replacement must specify here

A pitched roof replacement in Saguenay should specify ice-and-water membrane well up the slope and in every valley, shingles with a high wind rating and the enhanced nailing pattern, and ventilation sized for the attic. Steel roofing is common in the region because it sheds snow, but it needs snow guards above doorways and walkways or it sheds it onto people. A flat roof replacement should specify the membrane type, the insulation and slope to the drains, and the drains themselves, because ponding under a snow load is what splits a membrane. Get the workmanship and material warranties in writing and separately.

What Quebec requires, and what you should

Quebec requires anyone doing construction work for hire, including roofing, to hold a licence from the Régie du bâtiment du Québec in the relevant subcategory, and to be registered with the CNESST for workplace injury coverage. The RBQ’s public register shows the licence and any restrictions; a worker hurt on your roof by an unregistered contractor can become your problem. Quebec’s Consumer Protection Act gives a ten-day cancellation right on contracts made by an itinerant merchant, which covers most door-to-door roofing sales. A written contract should name the materials, the membrane, the flashing work, disposal and a payment schedule tied to milestones, and Saguenay’s municipal permit rules apply to structural changes.