Spider Control in Basements: Preventing Spider Invasions in Dark Areas

Spider Control in Basements: Preventing Spider Invasions in Dark Areas


Basements are notorious for being dark and damp, creating an ideal habitat for spiders. If you’re concerned about spider invasions in your basement, it’s important to implement effective control measures to keep these pests at bay. In this article, we will discuss spider control in basements and provide tips on preventing spider invasions in these dark areas. By understanding their behavior and implementing preventive measures, homeowners can create a more spider-free and comfortable basement environment.

Identify Common Basement Spiders:

Before implementing spider control measures, it is helpful to identify the common spider species found in basements. Some common basement spiders include:
Cellar spiders (Pholcidae): Also known as “daddy long-legs” spiders, they have long, thin legs and build messy webs in corners and crevices.
Wolf spiders (Lycosidae): These robust spiders are commonly found in basements. They are fast runners and prefer dark, secluded areas.
Sac spiders (Clubionidae): Sac spiders are small, pale spiders that build sac-like webs and tend to hide in cracks and crevices.
Jumping spiders (Salticidae): Known for their excellent vision and agile jumping ability, jumping spiders are commonly found in basements and other indoor areas.

Seal Entry Points:

Preventing spiders from entering your basement is a key step in spider control. Seal potential entry points to minimize their access, including:
Cracks and gaps: Inspect the foundation and walls for cracks or gaps, and seal them using caulk or sealant.
Windows and doors: Install weather stripping around windows and doors to prevent spiders from squeezing through small openings.
Utility openings: Seal utility openings, such as pipes and vents, with wire mesh or fine screens to block spider entry.

Reduce Moisture and Clutter:

Spiders are attracted to damp and cluttered environments. By reducing moisture and clutter in your basement, you can make it less appealing for spiders to inhabit. Consider the following actions:
Fix leaks and improve ventilation: Repair any leaks or water issues in your basement and improve airflow to reduce moisture levels.
Dehumidifier: Use a dehumidifier to maintain optimal humidity levels in your basement and discourage spider activity.
Declutter: Remove unnecessary items from your basement to minimize hiding places for spiders. Keep storage areas organized and elevated off the floor.

Regular Cleaning and Vacuuming:

Regular cleaning and vacuuming are essential in controlling spiders in basements. Here’s what you can do:
Dust and sweep: Dust and sweep your basement regularly to remove spider webs and egg sacs. Pay special attention to corners, windowsills, and crevices.
Vacuuming: Use a vacuum with a brush attachment to clean along baseboards, under furniture, and other hard-to-reach areas. Empty the vacuum outside to prevent spiders from re-entering your basement.

Reduce Outdoor Lighting:

Excessive outdoor lighting near basement windows can attract insects, which, in turn, attract spiders. Consider the following measures:
Install motion sensor lighting: Motion sensor lights only activate when movement is detected, reducing overall lighting and insect attraction.
Use blinds or curtains: Close blinds or curtains at night to minimize light escaping from basement windows.

Natural Spider Repellents:

Natural spider repellents can be used in conjunction with other control methods to deter spiders from entering your basement. Consider the following options:
Peppermint oil: Mix a few drops of peppermint essential oil with water and spray it in spider-prone areas. Spiders dislike the strong scent of peppermint.
Vinegar solution: Mix equal parts water and vinegar in a spray bottle and apply it to corners, baseboards, and other spider hiding spots. Vinegar is known to repel spiders.


Spider control in basements requires a combination of preventive measures, regular cleaning, and the elimination of attractive environments. By sealing entry points, reducing moisture and clutter, regular cleaning and vacuuming, reducing outdoor lighting, and utilizing natural spider repellents, homeowners can significantly reduce spider invasions in their basements. Creating an inhospitable environment for spiders ensures a more comfortable and spider-free basement space. If the spider infestation persists despite preventive efforts, it may be necessary to consult with professional pest control services to address the issue effectively and safely.