Fall Cleaning in Ontario — 2026
Ontario fall cleaning is driven by one deadline above all others: the arrival of heating season. By the time the furnace goes on for the first time (typically October in the GTA, September in northern Ontario), the home should be in a state where closed-window living is comfortable. Here's the fall cleaning framework.
Before Heating Season Starts
- Replace furnace filter: A new filter at the start of heating season ensures your home starts the winter with clean circulating air
- Vacuum heating vents and return air registers: The first furnace run of the season circulates air through any accumulated dust in the ductwork — cleaning vents beforehand reduces the first-run dust event
- Check weather stripping: Worn door and window weather stripping lets cold air in and warm air out — fall is the time to identify and replace it before cold weather
The Fall Clean Scope
- Windows: Inside and outside window cleaning before closing up for winter — condensation on cold glass is worse on dirty windows, and you won't have easy exterior access once winter arrives
- Entry areas: Deep clean the entry/mudroom before mud and salt season begins — clean the area thoroughly while it's still dry and easy to address
- Gutters (exterior — DIY or professional): Not a cleaning service item, but important — clogged gutters in Ontario freeze during winter and can cause ice dam damage
Professional Cleaning in Fall
A fall deep clean in September or October is the second most common deep clean occasion in Ontario (after spring). It addresses summer use — grease from more cooking, outdoor tracking, and the general use of summer entertaining — and prepares the home for the closed-window winter ahead.