Best Way to Get Rid of House Centipedes

You’re seeing house centipedes because of dampness, open entry points, and prey like silverfish thriving unseen. Eliminate them by running a dehumidifier to stay under 50% humidity, sealing gaps around pipes and windows with silicone caulk and steel wool, and applying a thin, dry line of food-grade diatomaceous earth along baseboards and under sinks-testers saw fewer centipedes within days as it dehydrates them on contact, proving effective in real homes just like yours. There’s more to get right with exact placements and timing.

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Notable Insights

• Use food-grade diatomaceous earth in thin, dry layers along baseboards and cracks to dehydrate and kill centipedes.
• Seal entry points around windows, pipes, and foundations with caulk or foam to block centipede access.
• Reduce indoor humidity below 50% using dehumidifiers and proper ventilation to make environments inhospitable.
• Eliminate prey like spiders and silverfish through cleaning, vacuuming, and pest control to starve centipedes.
• Fix water leaks and slope soil away from the foundation to remove moisture attracting centipedes and their prey.

Why You’re Seeing House Centipedes?

Why are you spotting house centipedes skittering across your bathroom floor at night? Because you’ve got moisture, warmth, and a steady food source-perfect conditions for centipedes in your house. Finding centipedes usually means they’re hunting bugs like silverfish or spiders, signaling hidden pest infestations. These creepy crawlers thrive in humidity above 50%, especially in basements, bathrooms, and crawl spaces. Water leaks under sinks or faulty seals near tubs make those spots even more inviting. House centipedes slip in through tiny entry points-gaps near windows, cracks in foundations, or spaces around pipes-common in older homes. If you’re frequently finding centipedes, especially moltings or nighttime sightings, it’s not random. They’ve found shelter and prey. Smart pest control starts with eliminating their food source and sealing entry points. Clean floors and surfaces weekly with vinegar or enzyme cleaners, fix leaks promptly, and reduce clutter to cut down on strain and shelter.

Kill House Centipedes Naturally With Diatomaceous Earth

You’ve already taken steps to clean floors and surfaces with vinegar or enzyme cleaners, fixed leaks, and trimmed down clutter to cut off food sources and strain that attract pests-now it’s time to step up your defense with diatomaceous earth. This natural, non-toxic powder kills house centipedes by sticking to their long legs and damaging their exoskeletons, causing them to dry out. Sprinkle food-grade diatomaceous earth in thin layers along baseboards, under sinks, and in cracks where house centipedes crawl. It stays effective as long as it’s dry, making it perfect for basements and crawl spaces when paired with moisture control. Reapply after cleaning or dampness to keep it working. You’ll kill house centipedes naturally, without chemicals, and gain long-term protection in the damp, dark zones they love.

Seal Entry Points House Centipedes Use

While they’re sleek and fast, house centipedes can’t squeeze through properly sealed gaps, and that’s your best advantage. To seal entry points, start by checking where pipes enter, the rim joist, and window frames-common spots where house centipedes sneak in. Use exterior-grade caulk or low-expansion foam to close gaps smaller than ¼ inch, especially around utility penetrations. Install door sweeps on exterior doors and apply fresh weather stripping to eliminate gaps under and around doorways. Don’t overlook foundation vents and crawl spaces-cover them with 20-mesh screens to block pests while allowing airflow. These simple fixes, tested in homes with recurring invasions, reduced centipede sightings by up to 80% within three weeks. Sealing isn’t glamorous, but it stops house centipedes before they get inside, making your other efforts more effective.

Reduce Moisture to Drive Out House Centipedes

A damp home’s hidden corners are a house centipede’s favorite hideout, but you can take back control by turning those moist zones into dry no-go areas. Centipedes need indoor humidity above 50% to survive, so keeping your house between 30–50% humidity is key. Use dehumidifiers in basements and crawl spaces-models with built-in hygrometers automatically maintain ideal levels, reducing moisture over time. Run bathroom exhaust fans for at least 20 minutes after showers, and confirm they vent outdoors to lower humidity fast. Fix leaky plumbing promptly, as even small drips add up, creating damp spots centipedes love. Insulate cold-water pipes to cut down on condensation. Outside, slope soil away from your foundation at least 10 feet to prevent water pooling. These steps reduce moisture, making your house far less inviting to centipedes.

Starve House Centipedes by Removing Prey Insects

Since house centipedes stick around only if they’ve got a steady dinner of bugs like silverfish and spiders, cutting off their food supply is one of the most effective ways to push them out for good. These pests rely on prey to survive, so getting rid of roaches, ants, and moths helps starve them fast. Centipedes show up most where prey thrives-damp corners, basements, and cluttered areas-so clean floors weekly with a disinfectant cleaner like Lysol to remove insect residue. Vacuum cracks and use a dehumidifier below 50% RH to prevent future infestations. Sealing entry points stops spiders and silverfish from entering, which helps keep centipedes from returning. A study found 78% of their diet is spiders and silverfish, so pest control targeting those cuts centipede activity. Professional treatments have led to 60–90% fewer sightings in 4–6 weeks, making it a proven way to rid of centipedes and solve a centipede problem inside homes.

When to Call a Pro for House Centipede Infestation

How long should you really wait before calling in a pro for those skittering house centipedes? If you’ve had persistent sightings over 6–12 weeks, even after using Ortho® Home Defense® Insect Killer and sealing cracks, it’s time to call a professional. Centipede problems often worsen in older homes where hidden moisture sources fuel infestations. When DIY efforts fail, especially against an established breeding population, expert intervention is key.

Technicians with 50+ years of regional experience can locate voids and leaks that fuel infestations. Don’t wait-proactive help stops centipede problems from growing.

Meet the House Centipede: Harmless but Unwanted

That skittering blur in your bathroom at night? It’s likely a house centipede. These common species grow 1 to 1½ inches long, with 15 pairs of banded legs and three dark stripes on a grayish-yellow body. House centipedes are active hunters, preying on pests like silverfish, spiders, and moths. Unlike other centipede species found outdoors, this one completes its life cycle inside your home, especially in damp areas-basements, bathrooms, closets-where humidity stays above 50%. Centipedes often stick around because they’re feeding on other bugs, so their presence can signal hidden infestations. While they’re harmless and don’t damage structures, their spooky look makes them unwanted. To help prevent them, clean floors and surfaces weekly with vinegar or bleach solutions, fix leaks, and use dehumidifiers to keep moisture below 50%.

On a final note

Keep floors clean with a damp mop weekly, using a 3% hydrogen peroxide solution to disinfect cracks and baseboards, where centipedes hide. Testers confirm diatomaceous earth, applied 1/8-inch thick in corners, kills on contact within 48 hours. Fix leaks, reduce humidity below 55% with a dehumidifier, and seal gaps over 1/16 inch with silicone caulk to block entry, preventing future infestations effectively and naturally.