Summer in Ontario is short. The pest pressure that comes with it isn't. Wasps building nests, ants invading kitchens, ticks in the long grass, mosquitoes in the backyard — every homeowner deals with at least a few of these every year.
The good news: most of it is preventable with some basic, consistent work around the house. Here's a checklist that covers the big ones.
Around the Outside of Your Home
Walk the perimeter once a month. Look for new gaps, cracks, or holes around the foundation, utility lines, and vents. Mice, wasps, and ants all exploit these.
Check soffit corners and roof edges. Wasps love starting nests in protected corners. A quick scan in late spring catches them before colonies grow.
Trim back vegetation. Branches touching the house are a highway for ants, wasps, and rodents. Keep at least 18" between shrubs and the siding.
Clean out gutters. Standing water in gutters breeds mosquitoes and attracts wasps looking for a water source.
Remove standing water. Empty kid pools, plant saucers, birdbaths, wheelbarrows, and anything else holding water for more than a few days. Mosquitoes need very little to breed.
In the Yard
Keep the lawn cut short, especially along property edges and around outbuildings. Tall grass is prime tick habitat.
Move wood piles away from the house. At least 20 feet, ideally raised off the ground. Wood piles harbour rodents, ants, and ticks.
Clear leaf litter from corners, garden beds, and along fence lines.
Maintain mulch beds. Mulch should be no more than 2–3 inches deep. Deep mulch holds moisture and harbours ants and earwigs.
Inspect children's play areas. Sandboxes, playhouses, and forts are common spots for wasp nests and ant problems. A quick look every few weeks prevents surprises.
In the Kitchen and Pantry
Wipe down counters daily. Ant trails follow scent. Even small crumbs invite them.
Store dry goods in sealed containers. Cereal, flour, pet food, anything in cardboard or paper. Pantry pests love unsealed packaging.
Take garbage out regularly. Especially anything with food residue. Wasps and fruit flies key in on this fast.
Rinse recyclables. Old beer cans and pop bottles in the garage attract wasps and ants in big numbers.
Decks, Patios, and Outdoor Living
Inspect under the deck and railing. Wasps build hidden nests under decks, in railing corners, and in lattice. Catch them small.
Check eating areas before guests arrive. Wasps and yellowjackets are attracted to sweet drinks, BBQ, and uncovered food.
Cover compost bins. Open compost is a buffet for wasps, flies, and rodents.
Use a screen on the BBQ. Mice love grease trays in dormant grills.
Around Pets
Use vet-recommended tick and flea preventatives all summer.
Check pets after every outdoor walk — especially if you've been in long grass or wooded areas.
Don't leave pet food outside overnight. Bowls of kibble bring raccoons, mice, ants, and wasps.
Wash pet bedding regularly. Common entry point for fleas and ticks.
Inside the House
Watch screens and weatherstripping. Damaged screens let in flies, wasps, and mosquitoes. Worn weatherstripping lets in everything.
Address moisture issues. Damp basements, leaky pipes, and condensation around windows attract carpenter ants, silverfish, centipedes, and earwigs.
Don't ignore the first sign of activity. One wasp at a window is one thing. Three a day for a week is something else.
When It's Time to Call
DIY prevention handles a lot, but not everything. Call a pro if:
- You've found a wasp or hornet nest near a high-traffic area
- You're seeing carpenter ants or signs of structural damage
- Mice or rats are getting in despite your best sealing
- Tick activity is heavy and your yard backs onto a wooded area
- Pest problems keep coming back despite your prevention work
A professional set of eyes catches what a homeowner often misses — and prevention is much cheaper than reaction.
Frequently Asked Questions
When should I start summer pest prevention in Ontario?Late April or early May. Most pest activity ramps up by mid-May; by mid-June, problems are already established.
Does professional pest treatment hurt the local environment?Modern treatments are targeted and safer than the products available a generation ago. We use the lowest-impact products that solve the problem.
Do I need a year-round plan or just summer service?Year-round plans give the best results, but seasonal treatments work for many homes. Tateum will help you figure out what fits your property and budget.
Are the products you use safe around kids and pets?Yes. We use professional products with established safety profiles, and we'll explain any short-term precautions for your specific situation.
Get Ahead of the Season
The best summer pest prevention is the work you do in May and June. By July, problems that could have been prevented are problems being managed.
Summit Pest Control offers preventative pest programs across Guelph, Cambridge, Kitchener-Waterloo, and surrounding areas. Owner-operated, prevention-focused, no call centres.
Call (226) 780-6446 or request a quick estimate today.