Spider Traps: How to Use Sticky Traps Effectively

Sticky traps (glue boards) are one of the most useful tools for spider monitoring and control. They are inexpensive, non-toxic, easy to use, and effective at both reducing spider populations and revealing the extent of an infestation. Here is how to use them effectively.

What Are Spider Traps?

Spider traps are flat cardboard or plastic boards coated with a strong, non-drying adhesive. When a spider walks across the trap, it becomes stuck and cannot escape. The traps also catch other crawling insects, providing insight into what prey is available to spiders in your home.

Unlike chemical treatments, sticky traps are completely non-toxic — safe to use around children and pets (though they can stick to fur or fingers if touched).

Choosing Spider Traps

Flat Glue Boards

The standard choice. Flat, low-profile boards that slide easily under furniture, along walls, and into tight spaces. Many come with fold-up tent covers that keep dust off the adhesive and prevent accidental contact.

Key Features to Look For

• Low profile: Must be thin enough to slide under furniture and into cracks.
• Strong adhesive: Should hold large spiders like wolf spiders without releasing them.
• Long-lasting: Quality traps remain sticky for weeks to months.
• Non-toxic: No chemical attractants or pesticides.

Where to Place Spider Traps

Placement is everything. Spiders tend to travel along edges rather than across open areas, so position traps accordingly:

High-Priority Locations

• Along baseboards: Flat against the wall where it meets the floor.
• Behind furniture: Sofas, bookshelves, dressers, and entertainment centers.
• Under beds: Near bed legs and headboards, especially if you are concerned about spiders in bed.
• In closets: Along back walls and corners.
• Basements: Along foundation walls, behind stored items, in corners.
• Garages: Along walls, behind shelving, near exterior doors.
• Bathrooms: Under sinks, behind toilets.
• Near entry points: By doors, windows, and utility penetrations.

Placement Tips

• Place traps flush against walls — not in the middle of the floor.
• Position traps in dark, sheltered areas where spiders hide and travel.
• Use at least 2 to 3 traps per room for effective monitoring.
• In basements and garages, increase density to one trap every 6 to 8 feet along walls.

How to Use Traps Effectively

For Monitoring

Place traps throughout the home and check them weekly. The number and species of spiders caught tells you:

• Which species are present (helps identify venomous species)
• Where spider activity is concentrated
• Whether control measures are working

For Control

In combination with other methods, traps help reduce spider populations:

• Replace traps when they become dusty or full.
• Move traps to areas with the highest catch rates.
• Combine with diatomaceous earth, natural repellents, and entry point sealing.

Limitations

Sticky traps have important limitations:

• They only catch spiders that walk across them — they do not attract spiders.
• Web-building spiders that stay in their webs may never encounter a floor-level trap.
• Large spiders can sometimes pull themselves free from weak adhesives.
• Traps must be checked regularly and replaced when they lose stickiness.

Sticky Traps as Part of an Integrated Approach

Traps work best as one component of a comprehensive spider management plan. Combine them with:

• Sealing entry points
• Reducing prey insects
• Removing webs and egg sacs
• Applying spider spray or natural repellents
• Following spider prevention tips

For comprehensive spider control, see how to get rid of spiders and our complete guide to spiders.

Expert Insights

Sticky traps are the single most valuable tool in my spider management arsenal. In 15 years of IPM practice, I have placed thousands of sticky traps and they consistently provide the best information about what species are present, where they are most active, and whether a treatment program is working. I always tell clients that traps are not just a control method — they are a monitoring tool that guides every other decision in the management plan. — Sarah Mitchell, BCE

Sources and References

• National Pest Management Association (NPMA)
• Ohio State University Extension
• University of California Riverside Spider Research

Main Causes

Indoor spiders activity reflects two drivers — a hospitable indoor environment and a sufficient supply of insect prey. Spiders enter through gaps under doors, around windows, utility penetrations, and any opening leading to attics, basements, garages, or crawl spaces. Once inside they settle wherever undisturbed corners, low light, and easy prey access converge. Cooler weather pushes outdoor species inside in late summer and fall as they seek mating sites or shelter. The most important upstream driver is the indoor insect population — homes with active fly, gnat, moth, or other pest activity sustain larger spider populations than homes without prey. Cluttered storage areas, accumulated webbing, and outdoor lighting that draws nocturnal insects all amplify the indoor pressure.

How to Identify

Sticky trap catches provide direct evidence of which spider species are active and at what population level. Examine caught spiders using a hand lens or photograph for identification before disposal. Key identifiers: wolf spiders are large, brown, and fast, with two prominent forward-facing eyes above a row of four smaller ones; brown recluses are tan to light brown with a violin-shaped marking on the cephalothorax and six eyes arranged in three pairs; black widows are glossy black with a red hourglass on the underside of the abdomen. Common house spiders and cellar spiders — the most frequent trap captures — are harmless and identifiable by their irregular webs, elongated bodies, and mottled coloring. Per UC IPM, a catch of more than a few spiders per trap per week in any one location indicates concentrated activity that warrants targeted follow-up inspection and control in that zone.

Risk and Severity

The primary value of sticky traps beyond direct capture is population assessment. Trap catch rates reveal whether the spider population is increasing, stable, or declining in response to control efforts. For harmless species, elevated trap catches signal that underlying conditions — prey insects, clutter, entry points — need attention, but present no immediate health risk. Confirming venomous species through trap catches escalates the risk level: a single brown recluse or black widow captured on a trap confirms the species is active in that area and warrants professional inspection. Per CDC guidance, black widow and brown recluse bites require medical evaluation; confirmed presence of either species indoors should prompt professional treatment rather than continued DIY monitoring alone. NPMA recommends that pest management professionals use trap catches as baseline data for treatment decisions, with follow-up trapping to verify population reduction after treatment.

Solutions and Actions

For most spider species the goal is removing webs and reducing prey rather than chemical treatment. Vacuum or sweep down all visible webs weekly, including egg sacs, in garages, basements, attics, eaves, and exterior corners. Reduce indoor insect populations by maintaining screens, sealing entry points, and addressing any active pest issue — fewer insects means fewer spiders. Apply a residual insecticide barrier to the foundation perimeter, around windows and doors, and in eaves to deter newly arriving spiders. For confirmed black widow or brown recluse populations in storage areas, use professional pest control, wear long sleeves and gloves when handling stored items, and shake out shoes and clothing left in garages or basements. Single sightings indoors without webs are usually transient and need no chemical response.

Prevention

Sticky traps reduce spider populations directly by capturing individuals before they reproduce, and indirectly by providing the monitoring data needed to target other prevention measures. Deploy traps before problems become visible — seasonal placement in late summer intercepts mating-season males before they penetrate living areas. Use trap catch patterns to identify active entry points and concentrate exclusion work at those specific locations. When catches decline consistently over several consecutive weeks, it confirms prevention measures are producing measurable results. Replace traps monthly regardless of catch volume to maintain reliable adhesion. Per UC IPM, combining sticky traps with exclusion sealing and prey insect reduction produces better long-term results than any single method alone. In homes with confirmed venomous species, maintain trap coverage year-round as an early detection system, since low catch numbers do not guarantee absence of an established population.

Frequently Asked Questions

Do spider traps work?

Yes. Sticky traps (glue boards) are effective at capturing wandering spiders like wolf spiders, brown recluses, and house spiders that travel along walls and baseboards. They are less effective against web-building spiders that stay in their webs. Beyond control, they serve as excellent monitoring tools that reveal species present and activity levels.

Where should I place spider traps?

Place sticky traps flush against walls, especially along baseboards, behind furniture, under beds, in closets, and near entry points like doors and windows. Spiders tend to travel along edges rather than across open spaces. In basements and garages, place traps in corners and along foundation walls.

How often should I check and replace spider traps?

Check traps every one to two weeks and replace them when they become dusty or full of captured insects. In humid environments, traps may lose their stickiness faster. Regular monitoring helps you track spider populations over time and evaluate whether your control efforts are working.

Are spider traps safe for pets and children?

Sticky traps are non-toxic but can be a nuisance if a pet or child contacts them. Place traps in locations that are accessible to spiders but not to pets and children — behind furniture, inside closets, and under beds. Some traps come in enclosed stations that reduce accidental contact.