Opening up the cottage is one of those rituals that defines an Ontario summer. The drive up, the keys in the lock, the smell of the lake. Almost perfect — unless you walk in to find mouse droppings on the kitchen counter and a wasp nest taking shape in the eave.
Cottages are uniquely vulnerable to pests. They sit empty for months, in habitat with high wildlife pressure, often without anyone checking on them. Here's how to inspect yours properly before the family arrives, and what to address as you settle in.
Why Cottages Get Hit Harder
A few reasons cottage pest pressure runs higher than residential:
- Long vacancy. Pests have months to establish without disturbance.
- Rural setting. More natural pest populations nearby — mice, ants, wasps, raccoons, even bats.
- Construction. Many cottages have less-tight building envelopes than year-round homes, with crawl spaces, exposed framing, screen porches, and minimal insulation.
- Food residue. Even careful closings sometimes leave behind crumbs, sealed but accessible dry goods, or pet food.
- Water sources. Lake proximity, leaky shut-offs, and seasonal humidity all support pest populations.
For most cottages, the question isn't whether some pest activity occurred over winter — it's how much.
The Pre-Opening Walk-Around
Before you unlock the door, take 15 minutes to walk the exterior.
Roof and soffits. Look for:
- Active wasp nests under eaves and in corners
- Bird or squirrel damage to fascia and soffit
- Bats emerging from gable ends (best checked at dusk)
- Rotted areas where animals may have chewed entry
Foundation. Look for:
- Holes or gaps where rodents may have entered
- Damage to vent screens
- Signs of digging or burrows along the foundation
Decks and stairs. Check underneath for:
- Wasp or hornet nests
- Carpenter ant activity in moisture-affected wood
- Rodent burrows
Outbuildings and woodpiles. Often the first colonized areas, and they often spill into the main building.
Once You're Inside
Step one: don't bring kids or pets in immediately. Do your inspection first.
Open windows briefly to air out the space.
Look for mouse activity. Check:
- Counters, drawers, and pantries for droppings
- Behind appliances and under sinks
- Stored bedding, towels, and fabric items for nesting material
- Wires for chewing damage
- Stored food for damaged packaging
Look for wasp/hornet activity inside. Sometimes nests are inside vents, attics, or wall voids. Listen for buzzing and look for individual wasps near windows.
Check for water damage. Pests follow moisture. Stained ceilings, soft floor spots, or musty smells indicate places to investigate.
Inspect the attic. If you have safe access, check for:
- Bat guano (small dark pellets, often piled below entry points)
- Mouse or squirrel droppings and nests
- Wasp activity at the gable
Check storage areas. Crawl spaces, basements, and storage rooms often hold the worst activity.
Look at the lake or water side. Carpenter ants, ants, and water-loving insects often establish at the waterfront edge first.
Common Cottage Pest Surprises
Things people are most often surprised to find:
- Wasp or hornet nests in soffits. A nest started in June can be football-sized by August.
- Mice that overwintered indoors. A single pair in November is dozens by May.
- Bats in attics. Often present without obvious daytime signs.
- Carpenter ants in damp framing. Especially in older cottages with moisture issues.
- Squirrels in attic insulation. Damage can be extensive after a winter of activity.
- Cluster flies emerging in spring. Often by the hundreds on warm days.
What to Address Before the Family Arrives
If you find anything significant, prioritize:
- Wasp/hornet nests in or near high-traffic areas — these need to be removed before anyone uses the deck or screened porch
- Mouse droppings — clean carefully (wear a mask, dampen first, don't sweep dry droppings) and set traps to catch any remaining
- Bat or squirrel activity in attics — wildlife control is its own category; we can refer you appropriately
- Carpenter ant signs — sawdust piles near windows, doors, or moisture-affected areas warrant a professional inspection
- Food storage — discard anything that's been opened or shows damage
Should You Just Schedule an Inspection?
For most cottages, a pre-season inspection is the easiest way to find and address issues before they ruin a weekend. Summit can do a full inspection of accessible cottages in Wellington County, Waterloo Region, and the broader edge of cottage country.
What's included:
- Exterior walk and entry-point identification
- Interior pest activity assessment
- Wasp/hornet nest removal where present
- Initial rodent treatment if signs are found
- Recommendations for the rest of the season
For cottages farther afield, we can usually refer you to a trusted local pro.
Frequently Asked Questions
When should I open the cottage?Most Ontario cottages open in late April or May. The earlier you open, the more time you have to address pest issues before peak season.
What if I find bats?Bats require specialized wildlife control. We can refer you to a trusted operator who handles bat exclusions properly.
Do I really need pest control at a cottage I only use 6 weeks a year?Periodic check-ins, even quarterly, prevent the worst surprises. A small wasp nest is much easier than a full colony.
Can I take pest products back and forth between home and cottage?We don't recommend it. Cross-contamination is a real concern. Keep stored pest products at the location where they'll be used.
Enjoy the Cottage, Not the Surprises
The first weekend at the cottage shouldn't involve scrubbing mouse droppings or backing slowly away from a wasp nest. A 30-minute inspection before opening — yours or a pro's — prevents almost all of these problems.
Summit Pest Control offers cottage and seasonal property inspections across Wellington County, Waterloo Region, and surrounding areas.
Call (226) 780-6446 or request a quick estimate today.