Dock Spider
The large brown spider on the boathouse wall. Dock spiders are semi-aquatic, common across Ontario waterfront properties, and intimidating to look at — but not aggressive toward humans.
Body up to 25 mm, leg span up to 75 mm. One of the largest spiders in Ontario. Brown with pale stripes along the abdomen. Long legs held flat against surfaces. Often found in groups on dock pilings, boathouse walls, and seawalls.
Docks, boathouses, seawalls, cottage decks, and any structure within a few metres of fresh water. Active May through September. Can run across the water surface and dive briefly underwater.
No. Dock spiders can bite if cornered and the bite is painful but not medically significant. They avoid humans and will retreat into water if approached. The size is the main concern, not actual risk.
Waterfront perimeter treatments target dock spiders specifically. Treat dock pilings, boathouse exteriors, and seawalls early in the season for best results. See waterfront and cottage service →
Premium Protection
Choose the protection barrier your property needs. Simple, professional, and guaranteed.
Our flagship exterior structural barrier targets the full perimeter of your home — foundations, soffits, window frames, eaves, and all entry points. Repels and eliminates spiders, ants, and crawling insects before they enter.
A comprehensive yard-level barrier applied to shaded vegetation, ornamental shrubs, deck skirting, and property borders. Reduces adult mosquito and tick populations around your outdoor living space.
SpiderShield™ perimeter barrier
SpiderShield™ creates an invisible exterior barrier that prevents more than just spiders — blocking ants, earwigs, crickets, and other seasonal crawlers from entering your home.
Wherever You Need Us
From the shores of Lake Erie to cottage-country docks — if bugs are a problem, we’re already on the way.
Genuinely Local Exterminators
Spider Squad is a family business — not a franchise, not a call centre. Our team lives in the communities we serve, which means faster scheduling, real accountability, and treatments designed for the pest pressures specific to this part of Ontario.
Don’t Wait
Same-week service available in most communities. Get a free assessment — no obligation.
Don’t Let Spiders Take Over
Tell us about your property and we’ll respond within hours to book your service. No obligation, no pressure.
