Discovering spiders in your house can be unsettling, but it's important to understand that most spiders are beneficial, feeding on pests that could otherwise cause damage. However, some species can pose health risks or cause property damage. This article will guide you through identifying common house spiders, understanding their habits, and dealing with spider issues in your home.
Common House Spiders and Their Identifying Features
Familiarizing yourself with common house spiders can help you identify them and determine the appropriate course of action. Here are a few species you might encounter:
- House Spider (Tidarren sisyphoides): Small to medium-sized, with a light brown or grey body and a dark stripe down the middle. They spin messy webs in corners and around windows.
- Cellar Spider (Pholcus phalangioides): Also known as the daddy long-legs spider, it has a small, light brown body and very long, thin legs. It spins messy webs in basements, cellars, and other dark, damp areas.
- Wolf Spider (Lycosidae family): Larger than most house spiders, with a robust body and eight eyes arranged in two rows of four. They have excellent night vision and hunt their prey actively rather than spinning webs.
- Black Widow (Latrodectus spp.): Easily recognized by the red hourglass marking on the underside of the female's abdomen. Their venom is toxic to humans, making them a dangerous species to have in your home.
Understanding Spider Habits and Behavior
Spiders enter homes through cracks, crevices, and gaps, seeking shelter, food, or mates. They prefer dark, undisturbed areas like basements, attics, and closets. Understanding their habits can help you anticipate where to find them and how to prevent them from entering your home.

Web-spinning vs. Hunting Spiders
Some spiders spin webs to catch their prey, while others, like wolf spiders, hunt actively. Web-spinning spiders, such as house spiders and cellar spiders, will build their webs in strategic locations where they can catch their prey with minimal effort. Hunting spiders, on the other hand, will actively search for their prey, often at night.
Seasonal Behavior
Spiders exhibit seasonal behavior, with many species becoming more active during the fall and winter months as they search for mates or seek shelter from the cold. During this time, you may notice an increase in spider activity in your home. Some species, like the house spider, may also lay their eggs in the fall, with the spiderlings hatching in the spring.
Dealing with Spider Issues in Your Home
If you're dealing with a spider infestation in your home, there are several steps you can take to address the problem:

Identify and Remove Webs
Regularly inspect your home for spider webs, especially in dark, undisturbed areas. Remove webs using a broom, vacuum, or by hand, being careful not to damage the web if it's a venomous species like the black widow.
Seal Entry Points
Spiders can enter your home through the smallest of cracks and crevices. Inspect your home's exterior for gaps around windows, doors, and vents, and seal them using caulk, weatherstripping, or foam sealant. Also, ensure that screens fit tightly in windows and doors.
Reduce Moisture and Clutter
Spiders are drawn to damp, cluttered areas where they can build their webs undisturbed. Reduce moisture in your home by fixing leaks and ensuring proper ventilation. Keep storage areas organized and clutter-free to minimize hiding spots for spiders.
Use Natural or Chemical Repellents
There are several natural and chemical repellents you can use to deter spiders from entering your home. Essential oils like peppermint, tea tree, and citrus can be effective natural repellents, while diatomaceous earth and insecticides containing active ingredients like permethrin or deltamethrin can be used as chemical alternatives. Always follow the manufacturer's instructions when using chemical repellents.
Professional Pest Control
If you have a severe spider infestation or are dealing with venomous species, it may be necessary to hire a professional pest control service. They have the knowledge and tools to effectively eliminate spider infestations and prevent future problems.
Preventing Spider Infestations in the Future
Preventing spider infestations involves creating an environment that's less inviting to spiders. Here are some tips to help you keep spiders out of your home:
- Regularly clean and organize storage areas to minimize hiding spots for spiders.
- Vacuum and dust regularly to remove spider webs and egg sacs.
- Seal entry points around your home's exterior to prevent spiders from entering.
- Use natural or chemical repellents to deter spiders from entering your home.
- Keep your yard tidy by trimming bushes, removing debris, and eliminating standing water, which can attract spiders and other pests.
By understanding spider habits, identifying common house spiders, and taking proactive steps to prevent and address spider issues in your home, you can create a more comfortable, spider-free living environment.