Timing the Fall Checklist
Fall maintenance in Canada is best completed before the first hard frost, which varies from late September in the Prairie provinces to November in coastal British Columbia. Many tasks — particularly those involving water systems, exterior caulking, and eavestrough cleaning — become difficult or impossible once temperatures drop consistently below freezing. A practical approach is to start non-leaf-dependent tasks (furnace check, weatherstripping) in September, then complete eavestrough cleaning after leaves have fully dropped, typically in October in most Canadian regions.
Eavestroughs and Roof Drainage
Leaf-clogged eavestroughs are the most common fall maintenance item for Canadian homes near deciduous trees. Blocked eavestroughs cause water to back up under roofing materials at the eave, contributing to ice dams in winter. The standard practice is to clean eavestroughs after the majority of leaves have fallen but before the first significant frost.
During cleaning, check for sags (indicating bracket failure), separation at joints, and rust or damage at the bottom seam of metal troughs. A trough that doesn’t drain completely — holding standing water after rain — is misaligned and will eventually contribute to ice formation at that low point.
Exterior Water Systems
Outdoor hose bibs that are not frost-free type must be shut off from the interior valve and the exterior spigot left open to drain. A hose left connected to an outdoor tap can trap water in the supply pipe even if the interior shutoff is closed, causing the pipe to freeze and burst. Irrigation systems require complete blowout of all zones before frost.
| Area | Fall Task | Timing |
|---|---|---|
| Eavestroughs | Clean debris after leaf drop | After leaves fallen; before frost |
| Outdoor hose bibs | Shut off interior valve; drain and leave open | Before first hard frost |
| Irrigation system | Blow out all zones with compressed air | Before first hard frost |
| Furnace | Replace filter; schedule annual inspection if due | September–October |
| Weatherstripping | Check door and window seals; replace if compressed | Before heating season |
| Attic | Check insulation coverage and ventilation gap | Before heating season |
| Smoke & CO detectors | Test; replace batteries if needed | At start of heating season |
| Basement windows | Drain and cover window wells if not self-draining | Before heavy fall rain |
Furnace and Heating System Readiness
The furnace filter should be replaced before the heating season begins, since the system will run continuously for months in most Canadian climates. A dirty filter at the start of the heating season means the furnace works against higher resistance immediately. The furnace itself should be test-fired in September or early October — not in November when technicians are busiest and delivery delays on parts are longer.
Gas furnaces should have their exhaust flue visually inspected for bird nests or debris, particularly if the flue terminates through a wall rather than through the roof. PVC flue pipes used on high-efficiency furnaces should have the exterior openings checked for blockage and the inlet pipe inspected for condensate pooling.
Draft Sealing and Weatherstripping
Door weatherstripping compresses over time and loses its sealing ability. The standard test is to close a door on a piece of paper: if the paper slides freely, the weatherstrip is no longer providing adequate contact. Foam compression weatherstripping typically lasts a few years; V-strip and door sweeps last longer. Exterior caulking at window and door frames should be checked for gaps, shrinkage, or cracking, as this is the principal entry point for cold air infiltration in older homes.
Smoke and Carbon Monoxide Detectors
The start of the heating season, when gas appliances, wood stoves, and fireplaces are put back into service, is the highest-risk period for carbon monoxide incidents in Canadian homes. Testing detectors and replacing batteries in October is standard practice. CO detectors have a manufacturer-rated service life of 5–7 years; units beyond that age should be replaced regardless of apparent function.