The areas of a home most vulnerable to silverfish are bathrooms, kitchens, basements and crawl spaces, attics, laundry rooms, closets and storage areas, and home offices or libraries full of paper. They share the conditions silverfish need: moisture or humidity, darkness, little disturbance and starchy food such as paper, glue, cereal and fabric. Saela Pest Control is a residential and commercial pest control company in Orem, Utah, that handles silverfish problems for homes and businesses. Below is what makes each area attractive and how to make it less so.
1. Bathrooms: Damp and Rarely Dry
Bathrooms attract silverfish because they stay damp and offer dark hiding spots close to water. NC State Extension’s silverfish guide notes that silverfish prefer cool, damp areas and are often found in bathrooms, basements and places where rarely used items are stored. In bathrooms, check:
- Under and around bath mats and rugs
- Behind the toilet and under the sink, where pipes enter the wall
- Around shower curtains, tub edges and loose caulk
- Inside cabinets and drawers that hold paper products
Run the exhaust fan during and after showers, fix drips and re-caulk gaps around tubs and pipes. Silverfish are active at night and hide during the day, so finding them in the tub or sink in the morning is common. If they keep appearing after you’ve reduced moisture, Saela’s silverfish control can find where they are hiding and breeding.
2. Kitchens: Food Within Reach
Kitchens give silverfish easy access to the starches and proteins they feed on. UC IPM’s pest note on silverfish and firebrats lists cereals, flour, pasta, pet food, paper with glue or paste, wallpaper sizing, book bindings and starch in clothing among their foods. In kitchens, the main attractions are:
- Cereals, flour, pasta and other dry goods
- Dry pet food stored in open bags
- Paper towels, napkins and paper bags
- Cardboard boxes and packaging
Store dry food in containers with tight lids and wipe up crumbs and spills regularly. Move cardboard out of pantries and under-sink cabinets, and fix leaks under the sink so the space stays dry. A dry, well-ventilated kitchen gives silverfish much less to work with, and the same habits help with other pests, as this look at how your home attracts pests shows.
3. Basements and Crawl Spaces: Dark and Damp
Basements and crawl spaces are among the most common places to find silverfish, because they combine darkness, moisture and stored items that rarely get moved. The conditions that make them vulnerable are:
- High humidity and condensation
- Poor air circulation
- Cardboard boxes, old papers and stored fabrics
- Little day-to-day human activity
Run a dehumidifier, improve ventilation and fix drainage or foundation leaks that let moisture in. Swap cardboard boxes for sealed plastic bins, and keep stored items off the floor and away from walls. Every Saela plan includes a 50+ point property inspection that covers basements, attics and structural gaps, which is where hidden moisture and harborage often turn up.
4. Attics and Roof Spaces: Warm and Undisturbed
Attics are a better fit for the silverfish’s close relative, the firebrat, which UC IPM says thrives in very warm, dry places, including attics in summer. Silverfish can still settle in attics where roof leaks or condensation keep areas damp. Common attic risk factors include:
- Heat buildup in summer, which suits firebrats
- Damp spots from roof leaks or poor ventilation
- Insulation and debris that provide cover
- Boxes of old books, papers and clothing
Check the attic a few times a year for leaks, damp insulation and droppings or shed skins near stored items. Good roof ventilation and repairing leaks make the space less hospitable. Store keepsakes in sealed plastic bins rather than cardboard.
5. Laundry Rooms: Warm, Humid and Full of Fabric
Laundry rooms suit silverfish because washers and dryers add warmth and humidity, and silverfish favor laundry rooms in the 71 to 90 degree Fahrenheit range, according to UC IPM. The most vulnerable spots involve:
- Moisture from washers, dryers and leaky hoses
- Piles of clothing, linens and other fabrics
- Paper and cardboard products such as detergent boxes
Make sure the dryer vents outside, check hoses and connections for leaks, and run a fan or dehumidifier if the room stays humid. Don’t leave laundry piled for long, and store linens in sealed containers. Move detergent and supplies out of cardboard packaging when you can.
6. Closets and Storage Areas: Quiet Hiding Spots
Closets and storage areas attract silverfish because they are rarely disturbed and often hold the fabrics and paper silverfish eat. The main weaknesses are:
- Clothing, books and paper stored for long periods
- Poor air circulation
- Moisture from shared walls with bathrooms or from exterior walls
Clean and vacuum closets regularly, including corners and along baseboards, and seal cracks where silverfish hide. Store seasonal clothing and paper in sealed plastic containers. Don’t scatter mothballs as a silverfish remedy: the National Pesticide Information Center explains that they are meant for closed, airtight containers and can harm people and pets when used in the open.
7. Libraries and Home Offices: Paper and Glue
Home libraries and offices are vulnerable because they hold large amounts of paper, book bindings and glue. Damaged paper may have notched edges or holes, NC State explains, and book bindings may show ragged edges or markings. These spaces are at risk because of:
- Bookshelves of older books, magazines and documents
- Stored paper products and files
- Humidity in rooms that are rarely heated, cooled or aired out
Keep humidity in check, dust and vacuum shelves, and look through rarely used books and boxes now and then. Store important documents and photographs in sealed plastic containers. If you find damage, check nearby walls and shelving for cracks, and see what a silverfish exterminator does when the problem is widespread.
Conclusion: Protecting Your Home from Silverfish
Protecting your home from silverfish comes down to three steps: reduce humidity, seal cracks and gaps, and store food, paper and fabric in sealed containers. NC State recommends reducing excess humidity with dehumidifiers and ventilation fans, sealing cracks and crevices, and cutting off access to food sources. Silverfish are mainly a nuisance and a threat to stored paper and fabric, and steady prevention usually keeps them in check.
If they persist, a professional can find the moisture problems and hiding spots you can’t see: Saela’s integrated pest management approach starts with pest identification, then moves through activity monitoring, targeted treatment and evaluation, following protocols developed by Dennis Weiss, who holds the Entomological Society of America’s Board Certified Entomologist credential. In a February 2024 Google review, Mark Lovgren wrote, “They explained everything they were doing and why and were very polite.”
To compare plan options, review Saela’s plans and pricing, then book a call to schedule a silverfish inspection.
Who wrote this article?
Devin Hutchings (Marketing Director at Saela Pest Control) wrote this article.
Devin leads Saela’s marketing and growth strategy. He brings more than 15 years of marketing experience across Uber, C.R. England, Lugg, and Neighbor. His background spans customer acquisition, retention, and developing marketing channels for service businesses and consumer marketplaces.
