How to Prevent Pests Before They Become a Problem

Want to prevent pests year-round? Get a professional home inspection to identify vulnerabilities before pests find them.

Most GTA homeowners call a pest control operator after they already have a problem. By then, there is an infestation to eliminate, damage to assess, and a longer, more expensive treatment process. But most common pest problems in GTA homes are entirely preventable with regular maintenance and seasonal attention. This guide walks you through what to check and when.

Spring (March to May)

This is when wildlife activity heats up. Raccoons are denning, squirrels are active, and mice that spent the winter inside your walls are still there.

• Inspect the exterior of your home for new gaps, holes, or damage from winter weather
• Check roof vents, soffits, and fascia for damage or loose sections
• Clean gutters and ensure they drain away from the foundation
• Seal gaps around gas lines, electrical conduit, and plumbing where they enter the foundation
• Move firewood at least 20 feet from the house and elevate it off the ground
• Trim tree branches back from the roof by at least 6 feet
• Inspect decks and sheds for gaps underneath

Summer (June to August)

Summer is peak season for insects. Ants, wasps, flies, and cockroaches are most active in warm weather.

• Keep kitchen surfaces clean and free of food residue
• Store all food in sealed containers
• Fix leaky outdoor taps and garden hoses
• Check window and door screens for tears
• Clean up fallen fruit from trees in the yard
• Keep bbq equipment clean and stored away after use
• Check for wasp nests forming under eaves and deck railings before they grow large
• Seal gaps in exterior walls, especially around pipe penetrations

Fall (September to November)

This is the most important season for pest prevention. Mice and rats start looking for warm shelter as temperatures drop. Raccoons and squirrels are also active in fall, preparing for winter.

• Seal every gap in the foundation, walls, and roofline larger than 6 mm
• Install door sweeps on all exterior doors
• Seal gaps around windows and door frames
• Check weather stripping on garage doors
• Move compost bins away from the house foundation
• Store bird seed in metal bins with tight lids, not bags
• Have a professional roof and soffit inspection done before winter
• Seal cracks in the foundation before winter freeze-thaw cycles widen them

Winter (December to February)

Most GTA pest problems discovered in winter have actually been present since fall. Use winter to address what you missed.

• If you hear mice in the walls, call an operator immediately. Winter breeding means the population grows quickly.
• Check for signs of pests in the basement and utility rooms
• Keep the basement dry. Mice are attracted to humid environments.
• Store items in plastic bins, not cardboard boxes, especially in the basement and garage
• Plan your spring pest prevention now. Make a list of what you need to seal and inspect.

Year-Round Habits

• Never leave food out overnight, including pet food
• Take garbage out daily
• Wipe down counters and sweep floors every night
• Fix leaky taps immediately
• Store firewood away from the house
• Keep compost in a sealed bin, not an open pile
• Do not leave dirty dishes in the sink overnight
• Store pantry items in sealed containers, not bags or boxes

When to Call a Professional

Call a licensed operator if:

• You see any pest inside your home, even once
• You find droppings in the basement, garage, or utility room
• You hear scratching or thumping inside walls
• You find signs of wildlife activity: torn vents, disturbed insulation, tracks near entry points
• You have had pest problems before and want preventive treatment

Frequently Asked Questions

What season are pests most active in the GTA?

Spring brings mice indoors and wildlife denning. Summer is peak for wasps, ants, and flies. Fall is when rodents start looking for winter shelter. Winter mice inside homes peak as they seek warmth.

Does sealing my home really prevent mice?

Yes, with one caveat. Mice can fit through gaps as small as 6 mm. Sealing every gap over that size significantly reduces the risk. A professional inspection finds the gaps a homeowner typically misses.

How often should I inspect my home for pest entry points?

Do a visual inspection at least twice a year: once in early spring and once in early fall. Inspect after major storms or construction.

Does landscaping affect pest problems?

Yes. Trees and shrubs touching the house provide an easy path for ants, squirrels, and raccoons to reach the roof. Keep vegetation trimmed back at least 2 feet from exterior walls.

What is the most important thing I can do to prevent pests?

Remove food sources. Store all food in sealed containers, clean up crumbs immediately, take garbage out daily, and fix leaky taps. No food means no reason for pests to stay.

Have questions about pest prevention? Get free quotes from licensed pest control operators in the GTA.