Key Takeaways
- Start with identification and inspection to find webs, entry points, and likely species.
- Use cleaning, decluttering, and exclusion to remove habitat and block entry.
- Favor nonchemical options: vacuums, sticky traps, and natural repellents.
- Use pesticides only as a last resort and follow label instructions.
- Call a professional for large infestations or if venomous spiders are suspected.
Tools Needed
- Vacuum with hose and crevice tool
- Flashlight
- Gloves (leather or nitrile)
- Step ladder
- Caulk gun
- Sticky traps (glue boards)
- Small brush or duster
Materials Needed
- Silicone or latex exterior/interior caulk
- Weatherstripping
- Door sweeps
- Trash bags
- Household cleaner or diluted bleach solution
- Diatomaceous earth (food grade) or boric acid (optional)
- Pyrethroid or insecticidal dust (optional, label-directed)
⚠️ Safety Warnings
- Wear gloves and eye protection when cleaning webs or applying powders and chemicals.
- Keep pesticides and powders away from children and pets; follow all label directions.
- If you suspect dangerous spiders like brown recluse or black widow, avoid direct handling and keep children and pets away.
- Never mix household chemicals; ventilate areas when using sprays or aerosols.
Step-by-Step Instructions
Step 1: Inspect and Identify
Begin with a systematic inspection of your home interior and exterior. Use a flashlight to check corners, ceilings, basements, attics, garages, closets, crawl spaces, and behind furniture. Look for webs, egg sacs, and shed skins. Note where webs are dense and whether they are classic orb webs or messy cobwebs—this helps identify common household spiders versus wandering species. Inspect foundation joints, vents, window screens, door frames, and utility penetrations for gaps. Photograph unfamiliar spiders and egg sacs for reference. Identifying hotspots and likely entry points lets you target treatments effectively and avoid unnecessary pesticide use.
Step 2: Declutter and Deep Clean
Remove clutter that provides hiding places: boxes, piles of clothing, and unused items in basements, attics, and garages. Vacuum thoroughly along baseboards, ceiling corners, and behind furniture to remove webs, egg sacs, and prey insects that attract spiders. Empty vacuum canister or bag into a sealed trash bag and discard outside immediately. Wash bedding, curtains, and window treatments on hot water cycles if webs were present. Regular cleaning reduces insect prey and eliminates existing webs, which discourages spiders from returning. Maintain a cleaning schedule to keep populations low over time.
Step 3: Remove Webs and Physically Remove Spiders
Remove visible webs with a vacuum or broom, starting from the outer edges and pulling webs into the vacuum hose. For live spiders, capture using a jar and a stiff piece of paper, then release outdoors at least 20 feet from your home if you prefer nonlethal methods. For repeat offenders or egg sacs, remove and discard the sac in an outdoor trash bin. When using a ladder to access high corners, have a helper steady it. Physical removal is effective for small numbers and immediately reduces encounters without chemicals.
Step 4: Seal Entry Points and Improve Exclusion
Spiders often enter through small gaps in the building envelope. Use silicone or latex caulk to seal cracks around window frames, doors, and utility penetrations. Install or repair window screens, add door sweeps to exterior doors, and apply weatherstripping to poorly sealed doors or attic hatches. Replace torn screens and fix gaps in foundation vents. For larger openings, use hardware cloth or foam backer rod prior to caulking. Exclusion is one of the most durable solutions because it physically prevents spiders and their prey from accessing interior spaces.
Step 5: Reduce Outdoor Attractants and Habitat
Modify exterior conditions that attract spiders and their prey. Keep vegetation trimmed away from the house by at least 12 inches, move firewood and mulch away from foundations, and store trash in sealed containers. Outdoor lighting attracts insects; replace bright white bulbs with yellow or LED 'bug' bulbs, or use motion sensors to reduce constant illumination. Clear away leaf litter and stack wood off the ground. Reducing the outdoor insect population and vegetation close to the structure lowers the food supply and harborage for spiders, decreasing pressure on indoor spaces.
Step 6: Use Traps and Natural Repellents
Place glue boards along baseboards, in closets, behind furniture, and in garages to capture wandering spiders. Check and replace traps regularly. For a natural deterrent, use essential oils like peppermint, tea tree, or eucalyptus diluted in water (test a small surface first) and spray around entry points and windowsills; results vary and are temporary. Food-grade diatomaceous earth applied carefully in wall voids, attics, or under siding can desiccate arthropods; use sparingly and avoid inhalation. These options offer low-toxicity alternatives and are useful for monitoring activity and reducing minor infestations.
Step 7: Targeted Pesticide Use and Follow-Up Monitoring
If nonchemical measures fail, consider targeted pesticide treatments as a last resort. Use labeled residual sprays or dusts for cracks, crawl spaces, and wall voids where spiders hide. Apply insecticidal dusts (e.g., silica or pyrethroid-based dust) per product instructions; only use products intended for indoor use in living spaces. Focus on perimeter treatments and voids rather than broadcast spraying. After treatment, continue monitoring with sticky traps and periodic inspections. Reassess exclusion and sanitation habits to prevent re-infestation and rotate methods if spiders persist.
When to Call a Professional
Call a professional pest control service if you find evidence of a heavy infestation across multiple rooms, see many egg sacs, or have repeated re-infestations despite following nonchemical steps. Professionals can perform a thorough inspection, identify species, apply targeted residual treatments, and recommend structural repairs or exclusion work. This is especially important when infestations are linked to hard-to-reach voids or exterior sources you cannot safely access. If you suspect venomous spiders such as brown recluses or black widows, contact a licensed professional rather than attempting removal yourself. Also seek professional help if anyone in the household is allergic to bites, very young, elderly, pregnant, or immunocompromised. A pro will reduce risk, apply appropriate treatments, and provide follow-up monitoring plans.
Frequently Asked Questions
Will killing spiders inside my home stop more from coming in?
Killing individual spiders gives immediate relief but does not address the underlying attractants or entry points. Long-term control requires reducing prey insects, cleaning webs, and sealing gaps. Without habitat modification and exclusion, new spiders will continue to enter. Use a combination of sanitation, exclusion, and monitoring for durable results.
Are spiders beneficial and should I leave them alone?
Many spiders are beneficial because they eat flies, mosquitoes, and other insects. If they are in low numbers and not causing concern, consider leaving them. Focus removal efforts on areas where webs interfere with living space or pose bite risk. For nuisance levels or venomous species, targeted removal makes sense.
Do natural repellents like peppermint oil really work?
Essential oil sprays can temporarily repel spiders in small areas but are usually short-lived and variable in effectiveness. They are best used as a complementary measure alongside cleaning, exclusion, and traps. Relying solely on natural repellents rarely eliminates an established infestation.
How can I tell if a spider is dangerous?
Dangerous spiders are typically identified by specific markings and body shape; brown recluses have a violin-shaped mark, and black widows have a red hourglass. Identification can be tricky, so avoid handling unknown spiders. Photograph suspicious spiders and consult a local extension service or pest professional for confirmation before attempting treatment.