How to Prevent Spiderwebs in Windowsills

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Spiderwebs in windowsills can be unsightly and difficult to remove. To keep spiderwebs out of windowsills, follow these simple steps:

1. Regular cleaning: Regularly clean your windowsills using a vacuum cleaner or a soft brush to remove any existing spiderwebs.

2. Seal cracks and gaps: Inspect your windowsills for any cracks or gaps where spiders can enter. Seal these openings using caulk or weatherstripping.

3. Use spider repellents: Apply spider repellents, such as essential oils like peppermint or citrus, along the windowsills. Spiders are repelled by these scents and will be less likely to build webs in those areas.

4. Keep windows closed: Keep your windows closed when not in use to prevent spiders from entering your home and building webs in the windowsills.

By following these steps, you can effectively keep spiderwebs out of your windowsills and maintain a clean and spider-free environment.


If you notice spiderwebs in your windowsill, it means that a spider has made its home in your house. While spiders can help catch pests, you may not want their webs in your windows. To keep spiderwebs out of windowsills, you need to take preventive measures to keep spiders out of your house. But what should you do if the spiders are determined to stay inside? Here are some methods you can use to eliminate them.

Discourage Spider Invasions

To discourage spiders, start by checking the exterior of your home. Use a flashlight to look for spiders and webs in dim areas. Then, take the following preventive measures:

  • Replace exterior lights, such as porch lights, with yellow LED bulbs that do not attract bugs.
  • Sweep away cobwebs near doors and windows.
  • Trim the landscaping at least 24 inches away from the foundation, preferably 8 feet, to prevent spiders from crawling into vents, windows, and doors.
  • Remove dead leaves and mulch from around the house to discourage spiders and their prey.
  • Install or fix screens on windows and sliding doors.
  • Add weatherstripping and door sweeps to exterior doors.
  • Seal cracks and crevices on the exterior of your home to keep spiders and other insects out. Clean the area thoroughly before using silicone caulk designed for outdoor use.

Make sure to check under porches, decks, and other attached spaces, such as the garage or storage closets. Seal boxes with packing tape to prevent spiders from making a home inside. Securely attach lids to plastic bins.

Inspect for Spiders

Inspect the interior of your home for spiders. Check behind furniture and curtains, under and behind tables and decorative items, around plants, near ceilings, and around firewood. Place sticky traps along baseboards, behind furniture, and under windows to catch spiders that do not spin webs. Not all spiders create webs; some, like wolf and jumping spiders, are hunters that stalk their prey.

Deal With Existing Spiders

If you already have spiders inside your home, there are different methods you can use depending on your opinion of having a spider as a roommate. To safely remove a spider:

  1. Get an empty jar.
  2. Place the jar over the spider.
  3. Slide a piece of stiff paper or cardboard, like a cereal box, under the spider to seal off the jar opening.
  4. Take the jar outside and remove the paper or cardboard.
  5. Release the spider from the jar by shaking it out or placing the jar on its side near a shrub or tree far from the house.

If you want to prevent spiderwebs in the windowsills more effectively, using insecticides is not recommended as it can be harmful to you, your family, and your pets. Instead, try the following methods:

Suggestions for Dealing with Spiders

  • Start by removing cobwebs from the windows.
  • Eliminate spiders by squashing them with a rolled-up newspaper, fly swatter, or shoe.
  • To get rid of spiders and their webs, vacuum regularly. Although vacuuming usually kills the spiders, it’s a good idea to empty the bag outside, just to be safe.
  • Apply food-grade diatomaceous earth or a dry pyrethrin product to windowsills and existing spiderwebs. Remember to wear a mask and keep the product away from children and pets, as pyrethrins are highly toxic to fish and cats.
  • Create a spider-killing spray by mixing equal parts of water and vinegar in a spray bottle. Add a drop or two of dishwashing liquid and shake well.

Spiders are attracted to windowsills because they offer easy access to prey, such as flies. Keeping flies and other pests out of the house can help reduce the spider population. Along with other measures, consider hanging disposable fly traps on the fence, far away from your home, to deter flying pests.

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