Spider Prevention: 7 Tips for Southwest Ohio Homes

The only two Ohio spiders that warrant caution

The black widow and the brown recluse are the only two medically significant spiders in Ohio. Both are shy and prefer undisturbed spaces — garages, basements, sheds, and storage boxes. Bites are rare, but if you find either species indoors, call a professional.

Common house spiders, cellar spiders, and wolf spiders look scary but are not dangerous.

1 — Kill the food supply (other bugs)

Spiders come inside because they follow prey. Reducing gnats, flies, moths, and small beetles is the single most effective spider control step.

2 — Change your outdoor lighting

White porch lights attract flying insects, which attract spiders. Switch to yellow 'bug lights' or warm LED fixtures, and aim lights away from doorways.

3 — Vacuum webs weekly

Regular vacuuming of corners, window frames, and light fixtures removes eggs before they hatch and signals to spiders that the location isn't safe.

4 — Declutter storage areas

Basements, garages, and attics are prime spider habitat. Use sealed plastic bins instead of cardboard boxes, and keep items 6" off the floor and away from walls.

5 — Seal the outside

Same rules as ants: caulk gaps, replace door sweeps, and repair torn screens. Pay attention to soffits and roof vents — big house spiders come in from above.

6 — Trim the perimeter

Pull ivy, tall grass, and shrubs 12" back from siding. Move woodpiles away from the house.

7 — Schedule a perimeter treatment

A quarterly exterior perimeter treatment creates a barrier at the foundation, eaves, and window frames. Done properly, it stops the incoming pipeline before spiders make it inside.