A stray cobweb in the corner of a room is normal, but consistent signs of a spider infestation usually point to something bigger happening behind the scenes. Spiders typically move indoors because there’s an active food source, meaning other insects, nearby. This guide covers the clearest signs of a spider infestation in BC homes, what’s likely drawing them in, and when it’s time to call a professional.
Spider control
Table of Contents
- 1. Webs Reappearing After Being Cleared
- 2. Multiple Webs in Different Rooms
- 3. Increased Spider Sightings Indoors
- 4. Egg Sacs in Hidden Corners
- 5. Other Insect Activity Nearby
- 6. Webbing in Basements, Garages, and Crawl Spaces
- Most Spiders Are Harmless, But Not Always Welcome
- Why Spiders Move Indoors in the First Place
- What to Do If You Notice Signs of a Spider Infestation
1. Webs Reappearing After Being Cleared
Finding the occasional web isn’t unusual, but if webs reappear in the same corners, basements, or window areas shortly after being cleaned, that’s a clear sign of a spider infestation rather than a one-off visitor.
2. Multiple Webs in Different Rooms
A single web in a garage corner is common. Seeing webs spread across several rooms, especially in undisturbed areas like closets, basements, and behind furniture, is a more significant sign of a spider infestation that’s spreading through the home.
3. Increased Spider Sightings Indoors
Seeing spiders occasionally is normal in most homes. Seeing them frequently, especially larger ones or multiple at once, is a sign of a spider infestation. This often indicates an abundant insect food source nearby, since spiders follow their prey indoors.
4. Egg Sacs in Hidden Corners
Spider egg sacs look like small, silk-wrapped balls, often tucked into corners, behind furniture, or in undisturbed storage areas. Each sac can contain dozens to hundreds of eggs, making this one of the more concerning signs of a spider infestation if found indoors.
5. Other Insect Activity Nearby
Spiders are predators, not scavengers, so their presence is often tied to an existing insect problem. Flies, moths, ants, or other small insects in the same area are frequently linked to signs of a spider infestation, since spiders are drawn to wherever their food source is most abundant.
6. Webbing in Basements, Garages, and Crawl Spaces
Dark, undisturbed, and humid areas like basements, garages, and crawl spaces are prime spider territory. Persistent webbing in these areas, especially combined with visible spiders, is one of the clearest signs of a spider infestation taking hold in less-visited parts of the home.
Most Spiders Are Harmless, But Not Always Welcome
Most spiders found in BC homes are harmless to humans, but that doesn’t make a growing population any less unwelcome, especially for households with young children or anyone uncomfortable with spiders. The National Pesticide Information Center notes that most spiders are shy and cannot bite through human skin, though a consistent presence of webs and spiders can still make a home feel neglected to visitors or potential buyers.
Why Spiders Move Indoors in the First Place
Spiders rarely come inside just for shelter. They follow food. A home with cluster flies, moths, ants, silverfish, or other small insects gives spiders a reliable hunting ground, and they’ll often set up webs near light fixtures, windows, or doorways where prey naturally gathers. Cooler fall temperatures and reduced outdoor insect activity can also push spiders to seek warmer, prey-rich spaces indoors. Cracks around foundations, gaps under doors, and unsealed vents are the most common entry points. Addressing these gaps and reducing the insects spiders feed on is often more effective long-term than treating spiders alone, since new ones will keep arriving as long as the food source remains.
What to Do If You Notice Signs of a Spider Infestation
- Clear webs and egg sacs regularly to disrupt nesting
- Reduce clutter in basements and garages where spiders like to hide
- Address any underlying insect activity that may be attracting spiders
- Contact a licensed spider control service for inspection and treatment
Top Line Pest Control provides professional spider control across Surrey, Langley, Port Coquitlam, Abbotsford, and the Lower Mainland. Our approach removes existing webs, treats hiding spots, and reduces the insect activity that draws spiders indoors in the first place, making your home less inviting to them long-term.
Get a Free Spider Inspection
Don’t wait for the signs of a spider infestation to spread through the home. Contact Top Line Pest Control today for a free inspection and quote.