Winter-Proofing: Critical Points to Check Before Winter

Why Fall Is the Ideal Time to Act

Quebec winters expose buildings to intense freeze-thaw cycles, heavy snow and ice accumulation, and temperature swings that quickly expose weaknesses in the building envelope. Whether you're in Montreal, Laval, the South Shore, or as far as Sherbrooke, a fall check-up prevents plenty of unpleasant surprises in the dead of January.

Roof and Gutters

Clean gutters and downspouts to prevent ice dams, which force water under the shingles. Inspect the roof's overall condition, the flashing around vents and chimneys, and make sure attic ventilation is working properly, poor ventilation accelerates uneven snowmelt and is a leading cause of those same ice dams.

Insulation and Air Tightness

A thermographic inspection in Laval or elsewhere in the region, done before deep cold sets in, reveals areas where insulation is insufficient or has settled, along with air leaks around windows, doors, and outlets. These invisible gaps are often the leading cause of abnormally high heating bills.

Foundation and Basement

Check the exterior condition of the foundation, seal any visible cracks, and make sure the grading slopes properly away from the building. These checks are closely tied to basement water infiltration issues, which often worsen in spring if snowmelt isn't managed properly.

Test the sump pump before winter if your property has one, and confirm the backup battery still holds a charge: a pump failure during a mid-winter thaw, combined with a power outage, is one of the most common causes of costly basement flooding.

Mechanical Systems

Doors, Windows, and Caulking

Check the weatherstripping around exterior doors and replace it if it's cracked or flattened. Redo the exterior caulking around window frames and penetration points, like dryer vents or electrical cables, wherever the old sealant has cracked under the freeze-thaw cycles of previous years.

Landscaping and Snow Management

Keep firewood, debris, and mulch away from the foundation wall, and trim back any shrubs touching the exterior cladding: snow piled against the building traps moisture and accelerates siding deterioration. Also plan where cleared snow will be piled, so it doesn't accumulate directly against the foundation or basement windows.

Chimney and Combustion Appliances

Have the chimney swept before the first use of the season if you heat with wood, to remove accumulated creosote and reduce fire risk. Also have the vent of any combustion appliance, such as a gas boiler or water heater, checked to make sure nothing could obstruct it and cause carbon monoxide to back up during winter, when windows stay closed for long stretches.

Preparing for Power Outages

Ice storms and strong winter winds regularly cause extended power outages across parts of the region. If your property has a sump pump, make sure it has a working backup battery. For homes with a generator, have it tested before the cold season, including a check of the automatic transfer system, rather than discovering a failure exactly when you need it most.

A More Cost-Effective Overall Plan

Pairing these checks with an energy audit helps you set clear priorities for your investments and fold them into your preventive maintenance routine instead of reacting at the last minute.