Silverfish Damage: What They Destroy and How to Stop It

Silverfish are not just a nuisance — they can cause real, sometimes irreversible damage to household items. From treasured books to important documents, from heirloom clothing to interior wallpaper, silverfish feed on a surprising range of materials. This guide documents the types of damage silverfish cause and how to prevent further losses.

Types of Silverfish Damage

Paper and Book Damage

Books and paper products are among the most commonly damaged items. Silverfish consume the cellulose in paper, the starch sizing, and the glue in bindings. Damage includes:

• Surface scraping that leaves thin, translucent patches
• Irregular, ragged-edged holes in pages
• Notched or scalloped page edges
• Separated bindings where glue has been consumed
• Yellowed stains from scales and excrement
• Damage to photographs, especially older prints with gelatin emulsions

Clothing and Textile Damage

Clothing damage from silverfish differs from moth damage in appearance:

• Irregular holes rather than round moth holes
• Surface scraping on fabric
• Concentration along stained or soiled areas
• Yellow or brownish staining
• Most common in cotton, linen, silk, and rayon garments

Wallpaper Damage

Wallpaper is particularly vulnerable because it provides both food (paste) and shelter (the dark space behind the paper):

• Peeling edges where paste has been consumed
• Small holes or scraped areas on the paper surface
• Yellowing or staining at baseboards and in corners
• Visible separation of wallpaper from the wall

Food Contamination

Silverfish that access pantry foods contaminate stored goods:

• Holes chewed in paper and thin plastic packaging
• Scales and droppings mixed into dry goods
• Contaminated flour, cereal, pasta, sugar, and other staples

Other Items

Silverfish also damage:

• Photographs and artwork
• Leather goods
• Postage stamps and historical documents
• Craft supplies (construction paper, fabric, glue)
• Carpet and upholstery (surface feeding, rarely deep damage)

How to Identify Silverfish Damage vs. Other Pest Damage

Different pests create different damage patterns:

Assessing the Extent of Damage

When you discover silverfish damage, take these steps:

1. Survey all vulnerable items: Check books, papers, clothing, wallpaper, and pantry items.
2. Document the damage: Photograph damaged items for insurance purposes if the damage is significant.
3. Identify the infestation zone: Look for other infestation signs — droppings, shed skins, eggs — to determine where silverfish are concentrated.
4. Assess the population: Set sticky traps to estimate population size.

Preventing Further Damage

Immediate Steps

• Remove vulnerable items from infested areas.
• Transfer papers, books, and clothing to sealed containers.
• Treat the infested area with diatomaceous earth or boric acid.

Long-Term Prevention

• Reduce humidity below 50 percent throughout your home.
• Seal cracks and entry points.
• Store all vulnerable items in sealed containers.
• Monitor regularly with traps.
• Follow our complete silverfish prevention tips.

Can Silverfish Damage Be Repaired?

Some types of silverfish damage can be partially repaired:

• Books: A professional book conservator can rebind damaged books, repair torn pages, and stabilize weakened paper.
• Clothing: Small holes can sometimes be repaired by a skilled tailor, but extensive damage is usually irreparable.
• Wallpaper: Damaged sections may need to be replaced. Consider alternatives to wallpaper in silverfish-prone areas.
• Documents: A document conservator can stabilize damaged papers, but lost text or imagery cannot be restored. This underscores the importance of digitizing critical documents.

For a complete control plan, see our guide on how to get rid of silverfish. For comprehensive information, visit the complete guide to silverfish.

Expert Insight

"Silverfish damage is cumulative and often goes unnoticed until it is significant," says Sarah Mitchell, BCE. "In my 15 years of IPM experience, the worst damage I have documented was in a library storage room where silverfish had been active for years. The surface etching on paper, the notched edges on book pages, and the irregular holes in fabrics were all classic signs — and much of it was irreversible."

Sarah Mitchell notes, "I always tell homeowners to check stored items annually, even if they have not seen silverfish recently. The damage these insects cause in dark, undisturbed storage areas can be substantial before anyone notices."

Solutions and Actions

Begin by removing all vulnerable items -- papers, books, and clothing -- from areas where damage has been found and inspecting them in good light. Discard heavily damaged or contaminated items in sealed bags to prevent spread. Transfer salvageable materials to sealed plastic containers. Treat the affected area with diatomaceous earth along baseboards, behind furniture, and in wall crevices. Deploy sticky traps along baseboards in each affected room to gauge population size and track control progress. Reduce indoor humidity below 50 percent using a dehumidifier -- this removes the environmental condition that sustains the population regardless of what products are applied. Seal cracks and gaps in baseboards, walls, and pipe penetrations to eliminate harborage. Recheck traps weekly for at least four to six weeks and retreat if catches continue.

Main Causes

Silverfish thrive where humidity stays above sixty percent and starchy or cellulose-based food is available. Damp basements, bathrooms, attics with poor ventilation, crawl spaces, and storage areas behind exterior walls are the most common nesting zones. They feed on book bindings, wallpaper paste, cardboard, dried pasta and cereals, dead skin and hair in dust, fabric starch, and any organic material with carbohydrates. They enter through utility penetrations, foundation cracks, and gaps around windows, and stowaway in cardboard moving boxes, used books, and stored documents brought into the home. Slow leaks, condensation on cold-water pipes, and inadequate exhaust ventilation in bathrooms create the persistent humidity that lets a small population establish into a sustained presence.

Risk and Severity

Silverfish pose no direct medical threat — they do not bite, sting, transmit disease, or contaminate food in ways that produce illness. The risk is material damage. They feed on book bindings, paper documents, photographs, wallpaper paste, fabric starch, cardboard, and stored dry goods, causing irreversible damage to archived materials, family photographs, important documents, library books, and stored clothing. Heavy populations also indicate persistent moisture problems that drive secondary issues — mold growth, structural wood decay, and other moisture-loving pests like booklice and mold mites. Allergic sensitivity to silverfish scales has been documented in a small number of cases. Risk scales with the value of stored paper goods and the severity of underlying humidity issues.

Prevention

Prevention is essentially a humidity-control program. Run dehumidifiers in basements, crawl spaces, and storage areas to maintain relative humidity below fifty percent year-round. Repair plumbing leaks promptly, insulate cold-water pipes to eliminate condensation, and improve bathroom ventilation with properly vented exhaust fans run during and after showers. Seal cracks around utility penetrations and along baseboards in moisture-prone rooms. Store books, documents, photographs, and seasonal clothing in sealed plastic bins rather than cardboard boxes, and elevate stored items off concrete floors. Periodically inspect storage areas and dispose of damp or damaged cardboard. Outdoors, ensure proper grading and downspout extensions to keep foundation areas dry, since perimeter moisture seeps inward and elevates indoor humidity over time.

Frequently Asked Questions

What does silverfish damage look like on paper?

Silverfish damage on paper appears as irregular surface scraping, notched or scalloped edges, small holes, and yellowish staining from droppings. They feed by scraping the surface with their mandibles, which creates shallow, uneven erosion rather than the clean holes made by insects that chew through material.

How much damage can silverfish really cause?

A single silverfish causes minimal damage, but a colony feeding over months or years can cause significant destruction to book collections, archived documents, stored clothing, and wallpaper. Because silverfish live for years and populations grow slowly but steadily, damage accumulates progressively.

Can silverfish damage electronics?

Silverfish are not known to damage electronic circuitry, but they may feed on paper labels, cardboard packaging, and the adhesives used in some electronic components. They are more of a nuisance than a threat to electronics.

How do I assess silverfish damage in my home?

Systematically inspect storage areas, bookshelves, closets, and any locations where you have seen silverfish activity. Check paper goods for surface scraping and edge notching, examine clothing for irregular holes, look behind wallpaper for feeding damage, and inspect pantry items for contamination. Document the extent of damage to gauge the size and duration of the infestation.

Sources and Further Reading

• NPMA — Silverfish Overview
• Purdue Extension — Silverfish Control
• NC State Extension — Silverfish and Firebrats