Spring
Check screens, foundation gaps, exterior drainage and early ant trails. Repair winter damage before warm-weather activity increases.
Summer
Inspect eaves, decks and sheds for wasp activity; manage outdoor food and garbage; keep vegetation from bridging directly to the structure.
Fall
Focus on rodent exclusion, garage doors, service penetrations and stored food before colder weather.
Winter
Use indoor signs to locate moisture, pantry pests and hidden rodent routes; plan exterior sealing for safe weather windows.
Canadian rule: if a pesticide is part of the plan, use only a product registered in Canada and follow the label for the named pest and treatment location. Provincial and municipal restrictions can still apply.