Stop Wandering Males & Overwintering Egg Sacs
Every September, Ontario homeowners report a sudden, alarming explosion in spider sightings inside basements, kitchens, and front porches. Discover the biological reason behind the autumn spider surge and how to stop spiders before they move indoors for winter.
A common myth is that spiders suddenly invade homes in fall to escape cold winter temperatures. In reality, native Ontario spiders are freeze-tolerant arthropods that produce glycerol (natural biological antifreeze) to overwinter outdoors. The real reason you see so many spiders in September and October comes down to two biological drivers:
Male spiders that spent the summer hiding outdoors reach sexual maturity in late summer. They abandon their webs and actively wander across walls, floors, and siding searching for females, making them 10x more visible.
As evening temperatures drop, flying insects cluster around warm home siding, foundation vents, and outdoor lighting fixtures. Large female orb weavers and cobweb spiders follow the food source straight to your doorways.
Applying an exterior perimeter booster spray in late August or early September provides the ultimate defense against the fall surge:
Premium Protection
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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.
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