Spiders Treatment
Across the Front Range.
Black widows in basements, hobo spiders in window wells, wolf spiders everywhere.
Most Colorado spiders are harmless — they catch flies and other pests and prefer to avoid humans. But two species (black widow and hobo) bite enough Coloradans every year to take seriously, and even harmless spiders aren't welcome on the kitchen counter.
EPC handles spiders via perimeter treatment, web removal, and harborage reduction.
About Spiders
Common Colorado spiders include wolf spiders (large, ground-running, harmless), house spiders (small, web-builders), black widows (shiny black with red hourglass — venomous, bite is rare but serious), and hobo spiders (brown, fast-moving — bite reaction varies). Egg sacs hold 50–300 spiderlings depending on species.
Signs You Have Spiders
- Webs in corners, basement window wells, garage corners, eaves
- Egg sacs (round papery sacs) attached to webs or tucked in corners
- Live spiders in basements, window wells, and outbuildings
- Black widow indicators: shiny black, red hourglass on underside, messy irregular web in protected dark spaces (woodpiles, basement clutter, sheds)
- Insect drainage — if you have lots of spiders, you have lots of insects
How EPC Treats Spiders
Perimeter Residual Treatment
Long-residual treatment applied to foundation, eaves, window wells, and entry points. Kills spiders on contact and creates a barrier that catches new arrivals.
Web Knockdown + Removal
Physical removal of webs and egg sacs from eaves, corners, and window wells. Reduces visible activity immediately and removes egg sacs before they hatch.
Targeted Harborage Treatment
Treatment in specific spider-favored zones — basement window wells, garage corners, woodpile areas, exterior light fixtures. Where insect populations are high, these are spider hotspots.
Insect Prey Reduction
Spiders follow their food. We identify the underlying insect populations (especially flies, moths, and ants) sustaining the spider activity and treat those too.
How to Prevent Spiders
- Replace exterior white lights with yellow 'bug' LEDs — fewer insects = fewer spiders
- Clear woodpiles, leaf piles, and brush at least 20 feet from the house
- Caulk cracks, seal vents, install door sweeps
- Vacuum corners, eaves, and window wells regularly
- Reduce basement and garage clutter where black widows hide
Frequently Asked Questions
Are spiders dangerous in Colorado?
Most aren't. Black widow and hobo bites are the two medically significant cases. Both are rare and avoidable with awareness — don't reach into woodpiles or unused basement boxes without gloves and a flashlight.
Do spider sprays actually work?
Direct contact sprays kill the sprayed spider. Residual perimeter treatments work because spiders walk through them on entry — but spiders don't groom much, so contact-active products are most effective.
Why do I have spiders all of a sudden?
Spider population follows insect prey. A surge of spiders usually means a surge of flies, moths, ants, or another underlying pest. Treating the prey insects reduces spider pressure.
How do I get rid of spiders in my basement?
Web knockdown + perimeter treatment + reducing window-well insect activity (insects fall in, spiders harvest them) + decluttering boxes and storage. We do all four in one visit.
Areas We Treat Spiders
EPC handles spiders calls across the entire Denver metro. Click your city for local detail:
Related Pests
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