Silverfish are strange-looking insects that can surprise homeowners when they dart across a bathroom floor or disappear behind a box in the basement.
Their tapered bodies, long antennae, and quick movements give them a distinctive appearance.
Silverfish do not bite people and are not known for spreading disease. They are mainly a nuisance pest, but larger populations can damage paper products, books, wallpaper, fabrics, and certain stored materials.
They can also be a useful warning that portions of the home may have excess moisture.
Why Are Silverfish in My House?
Silverfish prefer humid, protected environments.
They are often found in:
- Bathrooms
- Basements
- Crawl spaces
- Laundry areas
- Attics
- Closets
- Storage rooms
- Around plumbing
- Beneath sinks
Leaking pipes, condensation, damp foundations, poor ventilation, or persistent humidity can create ideal conditions.
What Do Silverfish Eat?
Silverfish feed on materials containing starches and carbohydrates.
Potential food sources include paper, cardboard, book bindings, wallpaper paste, glue, stored fabrics, and certain pantry products.
This is why they are sometimes discovered in old boxes, bookshelves, closets, or collections of stored papers.
Are Silverfish Damaging My Home?
Silverfish do not eat structural lumber the way termites do.
However, they can cause surface damage to books, photographs, documents, wallpaper, fabrics, and other stored materials.
Damage may appear as irregular holes, scraping, or areas where the surface has been eaten away.
Why Are They Mostly Seen at Night?
Silverfish prefer darkness and tend to remain hidden during the day.
They move quickly when exposed, which explains the familiar experience of turning on a bathroom light and seeing one race toward a baseboard.
Their hiding habits can allow a population to grow without being immediately obvious.
How Can You Reduce Silverfish Activity?
Moisture control is one of the most useful steps.
Repair plumbing leaks, improve ventilation, and use dehumidification where appropriate.
Reduce cardboard and paper clutter in damp storage areas.
Store valuable documents, photographs, and fabrics in sealed containers.
Seal cracks and gaps around baseboards, plumbing, and other areas where silverfish may hide.
When Should You Call Underworld Pest Control?
Occasionally finding one silverfish is not necessarily a major problem.
If you are finding them frequently, seeing them throughout several rooms, or noticing damage to stored materials, a larger population may be present.
Underworld Pest Control can inspect likely hiding areas, identify conditions contributing to the activity, and recommend an appropriate treatment.
Sometimes a silverfish problem is also telling you something useful: there may be more moisture in part of your home than you realize.