Vacuum and discard, sticky traps, and labeled dusts like boric acid or diatomaceous earth will kill house centipedes indoors.
What Kills House Centipedes Indoors Safely
Pick the least risky tool that fits the spot and the level of activity you see. When using any product, match the label to “centipedes” and indoor use, and follow directions line by line.
| Method | How It Works | Best Use |
|---|---|---|
| Vacuum capture, then seal and toss | Removes and contains the pest immediately; debris goes outside | Singles on walls, ceilings, tubs, or floors |
| Sticky boards | Adhesive traps immobilize and kill as moisture is lost | Along baseboards, behind appliances, near floor drains |
| Diatomaceous earth or boric acid dusts (labeled for indoor cracks) | Desiccant particles damage the cuticle; death follows from water loss | Light, hidden films in cracks, wall void edges, and pipe chases |
| Residual sprays labeled for centipedes | Contact and residual action on treated surfaces | Perimeter band indoors per label, or outdoor foundation band |
| Direct mechanical kill | Shoe, paper towel, or jar capture with quick dispatch | Any single sighting where clean-up is simple |
Vacuum Capture: Fast, Clean, No Residue
Speed beats speed. Keep a vacuum ready in basements, baths, and laundry rooms. When one appears, vacuum it, bag or bin the contents, tie the bag, and take it outside. If the model is bagless, empty into a trash bag outdoors. This clears the pest with no residues and gives you a quick read on traffic: more catches mean more fixes to make nearby.
Sticky Boards: Low Effort Kill And Monitoring
Flat glue boards placed flush to walls intercept night runners. Set them along baseboards, behind a washer, near sump lids, under a sink, and by floor drains. Traps both remove live centipedes and show where lanes are busiest, which helps you target drying and sealing work. Replace each board when dust or debris lowers grip. Label boards with dates so you can track progress.
Diatomaceous Earth Or Boric Acid: Dry Them Out
Desiccant dusts kill by drying the body surface. Use only products that list indoor cracks and crevices on the label. Apply a thin, almost invisible film into gaps where legs will brush: under sink rims, along slab joints, behind baseboards, and around pipe penetrations. Wipe any visible excess. These dusts work best when the zone is already dry and clean.
Residual Sprays: Label-True And Targeted
Some homes with heavy activity add a residual. If you choose that route, pick a product that names centipedes and allows indoor use, then treat only the places the label lists. Many buildings gain more from drying and prey control than from spray alone, so keep the core fixes in motion even if you add a chemical layer.
Killing House Centipedes Fast: Step-By-Step
Use this simple order of actions to clear live runners and set up a win.
- Vacuum the one you see. Seal the debris and carry it outside.
- Place two to four glue boards near the sighting. Add more by drains, the water heater, and the sump.
- Dry the zone. Run a dehumidifier, flip on exhaust fans, wipe any standing water, and insulate “sweating” pipes.
- Dust cracks and hidden edges with a light film of diatomaceous earth or boric acid that lists indoor cracks on the label.
- Seal gaps. Caulk the edge of baseboards, foam around utility lines, and seal the lid around the sump cover.
- Screen basement floor drains where that fits the layout. This blocks an easy lane.
- Check traps every few days for two weeks. Replace spent boards and keep drying the area.
Kill Centipedes In The House Without Sprays
You can clear them with tools that leave no broadcast residues. Extensions across the country list the same core set: moisture control, prey reduction, sealing, traps, and careful use of dusts in tight edges. University of California IPM notes that lowering dampness and removing debris reduce both centipedes and the insects they hunt. Penn State Extension adds basement tweaks like screens over drains and sealed sump lids for buildings that need them.
Moisture Control That Pays Off
House centipedes favor damp, cool zones. Dry the air to near 50–55% relative humidity with a dehumidifier, fix leaks, run bath fans after showers, and vent clothes dryers outdoors. Grade soil so water moves away from the foundation. These steps cut shelter, slow prey, and make treated cracks far more effective.
Cut The Food Supply
Fewer roaches, flies, and silverfish means fewer centipedes. Clean sink and tub drains, store pantry items in tight containers, empty trash on a schedule, and keep pet dishes dry overnight. Repair door sweeps and window screens so prey stays out. When prey drops, centipede numbers follow, and traps confirm the trend.
Seal And Screen The Entry Points
Fill gaps where pipes enter, seal cracks in slabs and block walls, and foam around utility lines. Screen basement floor drains and seal sump covers where the building design allows. That change denies a straight path from damp voids to living spaces.
Use Traps As Both Kill And Intel
Glue boards pick off runners and turn sightings into data. Place them along known paths, label each with a date, and count what you catch every few days. Move boards to hot spots until counts drop. When the tally stays near zero for two weeks, remove boards and keep the area dry and sealed.
Prevention That Cuts Numbers Down
After the first round, hold the gains with a short, steady list of habits. These moves block new arrivals and keep their prey in check, which makes your home a poor hunting ground.
| Task | Target Area | Result |
|---|---|---|
| Run a dehumidifier to keep RH near 50% | Basement, laundry, crawl space | Drier air and fewer hiding spots |
| Fix leaks and insulate “sweating” pipes | Under sinks, utility rooms | Less free water for pests |
| Screen floor drains and seal sump lids | Basement, utility rooms | Fewer entry points |
| Seal cracks and utility gaps with caulk or foam | Baseboards, slab edges, around lines | Fewer harborages and entrances |
| Thin or replace thick mulch near the foundation | Perimeter beds | Drier perimeter that attracts fewer arthropods |
| Store cardboard off the floor; reduce clutter | Storage rooms, garages | Fewer daytime hideouts |
When Pesticides Are Justified
Many homes never need them for this pest. If activity stays high after drying, sealing, and prey control, and traps keep filling, you can add a labeled product to the plan. Penn State lists two dust actives for this use—boric acid and diatomaceous earth—for careful, light films in cracks and hidden edges. Some programs even advise skipping indoor insecticides for this species because building fixes work so well; the goal is to keep treatments tight, targeted, and only where labels allow.
Safety First With Any Product
- Read and follow the entire label. The label is the law.
- Start with non-chemical steps and spot treatments. See the EPA’s plain-language home safety tips for the order of action.
- Keep dusts and sprays out of open living space. Aim for cracks and hidden edges, not carpets, counters, bedding, toys, or pet areas.
- Avoid mixing products. Stick with one approach at a time and reassess using your trap counts.
- If small children, older adults, or sensitive pets live in the home, favor vacuuming, traps, sealing, and drying.
What Brings House Centipedes Inside
These hunters chase three things: water, cover, and prey. A damp corner in a basement, a loose lid on a sump, a floor drain without a screen, or stacked boxes can provide all three. Outdoors, beds piled high with wood mulch against the foundation create a cool, damp band that feeds the insect crowd centipedes like to hunt. Trim back groundcover from the perimeter, and use a narrow stone or gravel strip against the wall so splashback dries fast after rain.
Where They Hide During The Day
Most activity peaks at night. During the day, they press flat into narrow cracks, rest under cardboard, or tuck beneath washer pans and sink bases. They also shelter under bath mats or inside hollow baseboards. A quiet flashlight sweep after dark often reveals favorite lanes: the seam along a slab, the shadow under a cabinet toe-kick, the space behind a utility sink. That is where traps and dusts work hardest for you.
How To Tell You’re Winning
Lower counts on glue boards, fewer night sightings, and a drier smell in the basement are the signals to watch. When traps sit empty for two weeks, remove them, keep the dehumidifier on a schedule, and refresh caulk where movement once showed. If activity flares again after heavy rain, repeat the short cycle: vacuum, reset traps, dry the zone, and seal any new gaps. Keep notes; a small log turns into a steady trend line that guides where to work next.
Myths That Waste Time
“Pour Bleach Down Every Drain”
Bleach fumes and splashes carry risks and do little against a mobile hunter that does not live inside pipes. Drain cleaning helps when organic film feeds flies, but that is a different target. Use safe drain cleaning and screens for that task; save the bleach for laundry duty.
“Bug Bombs Fix It”
Room foggers spread product into the air and onto surfaces where you do not need it. They miss tight cracks where centipedes rest and leave residue where people live. Hands-on steps and tight cracks-and-crevice work run circles around a fogger for this pest.
Quick Reference: What Kills House Centipedes Right Now
If one just sprinted across the floor, you have options. Vacuum and toss. Squish and clean. Set glue boards along the wall tonight. In a tight edge, a dust labeled for indoor cracks will finish the job. Then dry the zone and cut their food supply. Those moves solve the now and prevent the next wave.
Want more depth? These trusted sources explain centipede behavior and control in plain terms: Penn State Extension on house centipedes and UC IPM’s centipede guidance. Pair those with safe-use advice from the EPA link above, and you’ll have both the “how” and the “why” for each step here.