Silverfish Treatment
Across the Front Range.
Paper-eating, wallpaper-paste-loving bugs in basements, attics, and bathrooms.
Silverfish are slim, silvery, fast-moving insects that eat starches and paper products — books, wallpaper paste, cardboard, dry pasta, even old photos and document storage.
They thrive in humid, dark spaces: basements, bathroom voids, attics, and storage areas. Treatment combines residual perimeter + moisture reduction + harborage cleanup.
About Silverfish
Silverfish are 3/4 inch, teardrop-shaped, with three long bristles at the rear. Silvery-gray with a metallic sheen. They live 2–8 years (long for an insect), reproduce slowly, and prefer 75–95% relative humidity. They're nocturnal and run extremely fast when disturbed.
Signs You Have Silverfish
- Silvery, fast-moving insects in basements, bathrooms, attics
- Yellowish stains and small holes in stored paper, books, cardboard
- Damage to wallpaper edges and book bindings
- Tiny pepper-like droppings around stored items
- Concentration in dark damp storage areas
How EPC Treats Silverfish
Perimeter and Void Treatment
Residual treatment around foundation, basement, attic eaves, and bathroom wall voids. Long-residual products work well because silverfish populations are slow-growing.
Crack-and-Crevice Dust
Insecticidal dust in wall voids, behind baseboards, in attic insulation gaps. Long-lasting in dry undisturbed environments.
Humidity Recommendations
Tech walks the property identifying moisture issues — sweating crawlspace, leaky bathroom plumbing, missing vapor barrier. Reducing humidity below 50% kills silverfish populations slowly.
Storage Sanitation
Recommendation list for cardboard storage, attic insulation gaps, basement document boxes — silverfish food/harborage that needs to be removed or sealed.
How to Prevent Silverfish
- Run dehumidifiers in basements and crawlspaces (target <50% RH)
- Replace cardboard storage boxes with sealed plastic bins
- Repair plumbing leaks promptly; vent bathrooms during/after showers
- Remove old paper products, magazines, and newspaper stacks from basements and attics
- Caulk gaps around bathroom plumbing penetrations and baseboards
Frequently Asked Questions
Do silverfish bite?
No, they don't bite people or pets. The damage is to paper, books, and starchy materials.
Are silverfish a sign of a bigger problem?
Yes — they're a humidity indicator. Significant silverfish populations almost always trace back to a moisture issue: leaky pipes, poor crawlspace ventilation, or an unfinished basement with no vapor barrier.
How long do silverfish live?
2–8 years. They're one of the longest-lived insects in your home, and they reproduce slowly — which is why treatment with long-residual products works so well.
Can I get rid of silverfish without chemicals?
Drying out the environment to <50% RH will eventually crash the population, but it takes 6–12 months and requires major dehumidification or vapor barrier work. Treatment is faster.
Areas We Treat Silverfish
EPC handles silverfish calls across the entire Denver metro. Click your city for local detail:
Related Pests
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