The Complete Home Maintenance Checklist for Ontario Homeowners

Ontario homes take a beating. We go from -25°C winters to humid summers, with wet springs and dry falls. Each season creates specific vulnerabilities, and catching problems early is always cheaper than fixing them after they've escalated.

This checklist covers the key maintenance tasks for each season, tailored to Ontario's climate.

Spring (March–May)

After winter, your home's exterior takes priority:

• Inspect roof for missing, cracked, or lifted shingles after winter
• Check and clean eavestroughs and downspouts — remove debris, test drainage
• Examine foundation for new cracks after freeze-thaw cycles
• Test sump pump before spring thaw by pouring water into the pit
• Check exterior caulking around windows, doors, and penetrations
• Inspect deck for heaved boards, split wood, or rusted fasteners
• Service air conditioning before the first hot spell
• Clean dryer vent — a full year of buildup is a fire hazard

Summer (June–August)

Summer is for exterior work and prevention:

• Touch up exterior caulking and paint where moisture can get behind
• Check fence posts for heaving or rot at grade
• Inspect deck stain/seal — reapply every 2–3 years in Ontario's climate
• Trim trees and shrubs away from the house and power lines
• Check window and door screens — repair or replace torn screens
• Clean AC condenser coils and check refrigerant performance
• Inspect and clean range hood filter

Fall (September–November)

Fall is the most important maintenance window — you're preparing for a long winter:

• Shut off and blow out exterior hose bibs before first frost
• Clean eavestroughs of leaves before freeze — blocked gutters cause ice dams
• Check attic insulation and ventilation — prevent ice dams from inside
• Seal gaps around pipes, utility penetrations, and foundation cracks
• Test smoke and carbon monoxide detectors — replace batteries
• Service furnace and replace filter — book an HVAC inspection
• Caulk any gaps in window and door frames before heating season
• Disconnect and store garden hoses

Winter (December–February)

Winter is less about outdoor work and more about indoor monitoring:

• Monitor for ice dams on roof edges after heavy snowfall
• Keep roof drainage paths clear of ice buildup where possible
• Check basement walls and floor for moisture during thaws
• Replace furnace filter every 3 months (or more with pets)
• Test GFCIs in bathrooms, kitchen, and garage monthly
• Keep cabinet doors open under sinks on exterior walls during extreme cold

Year-Round Tasks

Staying on top of maintenance is the single best investment you can make in your property. If you find something during your inspection that needs professional attention, call (289) 928-5689 for a free estimate.

• Test smoke and CO detectors monthly
• Check under sinks and around appliances for drips quarterly
• Flush water heater annually to remove sediment
• Run water in unused fixtures to prevent trap evaporation