Signs of Spider Infestation

Pest Expert Matthew S. Hess
04/16/2025

Detecting a spider infestation early can help prevent more significant problems and ensure a comfortable living space. Here are some key signs to look for:

Visible Spiders

The most obvious sign of a spider infestation is the presence of spiders themselves. If you consistently see spiders throughout your home, especially in common areas like corners, basements, or attics, it may indicate an infestation.

Noticing multiple spiders in a single room, particularly near windows or doorways, suggests they are actively residing there.

Spider Webs

Spider webs are a telltale sign of spider activity. Different species create various types of webs—orb weavers construct circular webs, while cobwebs are typically messy and irregular.

Finding cobwebs in corners, along baseboards, or in seldom-used areas such as garages or storage spaces can indicate that spiders have taken up residence.

Egg Sacs

Female spiders often produce egg sacs, which can contain dozens to hundreds of eggs. These sacs can often be found attached to webs or hidden in corners and crevices.

Discovering small, silk-covered spheres in your home can indicate that a spider has laid eggs, leading to an increase in the spider population.

Increased Insect Activity

Spiders feed on insects, so if you notice an increase in other insects around your home, it may attract more spiders. This situation can create a cycle of infestation. Seeing more flies, ants, or other pests in your home could mean spiders will follow, as they search for food sources.

Droppings

Spider droppings can resemble small, dark specks or stains. While not always easy to spot, these signs may be found near webs or nesting areas, especially in corners and around stationary furniture. If you notice small black or brown spots on surfaces, especially near spider webs, it could indicate spider activity.

Damage to Property

Some spider species can cause damage to property, particularly if they create extensive webs or nest in areas where they can block ventilation or other functions. Finding webs in vents or electrical fixtures can not only create a nuisance but also pose potential hazards, and are a sure sign of infestation.

What To Do When You See Signs of Spiders

Being aware of the signs of spider infestation can help you identify a problem early and take appropriate measures. If you notice multiple indicator signs of spider infestation, it may be time to consult with our friendly staff here at Four Seasons Pest Solutions. Our certified Inspectors can assess the situation and provide effective treatment options, like our 4×4 Pest Plan. Additionally, they can make recommendations for pest exclusion, sanitation, and other services aimed at eliminating and preventing future infestations. Like our customers always say, “It’s good to have Four Seasons on your side!”