Why Do I Have Silverfish in My House? Uncovering the Hidden Reasons

folder_openInsecta, Zygentoma
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Have you ever wondered why silverfish find their way into your home? These ancient insects, with origins dating back over 400 million years, are often seen in dark and damp places around the house. Understanding their habitat preferences and attractions can give you insight into why you have silverfish in your home.

Silverfish thrive in cool, damp environments, and they can often be found hiding in basements, cupboards, or under objects. They are known for damaging paper products and even fabric materials due to their feeding habits. When they enter your home, it is likely because they are seeking moisture, warmth, and sources of food.(source)

By recognizing the factors that attract silverfish, you can take preventive measures to reduce their presence in your home. Keep areas clean, reduce excess moisture, and store sensitive materials like books and fabrics in airtight containers to keep these elusive pests at bay.

Understanding Silverfish

Silverfish are small, wingless insects with a distinctive silvery-blue color. They belong to the Lepisma saccharina species and are also known as bristletails due to the three bristles at the end of their abdomen.

These nocturnal creatures have long antennae and are often found in damp, dark areas of your house. They can survive in various environments and are attracted to items that contain starch or cellulose, such as books, cardboard, or wallpaper.

The presence of silverfish in your home may be due to specific conditions that attract them:

  • Humidity: Silverfish thrive in high humidity, so they love damp spaces like bathrooms, kitchens, and basements. If you’re experiencing a silverfish infestation, consider checking for leaks or moisture problems.
  • Food sources: They feed on starchy materials, paper, glue, and even clothing. Keeping these items in sealed or protected places can discourage silverfish from infesting your home.
  • Shelter: They prefer hiding in cracks and crevices during the day. Make sure to seal any gaps in your walls, floor, or furniture where they might find refuge.

In conclusion, to prevent a silverfish infestation, aim to control the humidity levels in your home, store items they might feed on in secure places and seal any potential hiding spots that could harbor them.

Causes of Silverfish Infestation

Silverfish are common household pests that can be quite annoying. There are several reasons why you might find them in your house:

Moisture plays a significant role in attracting silverfish. They thrive in environments with high humidity, such as basements and damp areas under sinks or in laundry rooms.

Infestation occurs when silverfish find a suitable environment to live and reproduce. Cracks in walls and tight spaces behind furniture can provide shelter for these pests.

Cracks and crevices serve as entry points for silverfish. They exploit any openings to gain access to your house, often through door and window frames.

Silverfish are also attracted to clutter. Items like old newspapers, cardboard boxes, and piles of clothing provide them with both shelter and sustenance.

To reduce the chances of silverfish infestation, try the following:

  • Keep humidity levels low by using dehumidifiers or air conditioning.
  • Seal any cracks or crevices around your home.
  • Regularly clean and organize storage spaces to eliminate potential hiding spots.
  • Address any leaks or moisture problems promptly.

By taking these measures, you can help protect your home from silverfish and create a less inviting environment for them to thrive.

Damage Caused by Silverfish

Silverfish can cause considerable damage to items in your home due to their feeding habits. They are particularly fond of paper, books, cardboard, clothing, wallpaper, carpet, and book bindings. Their feeding marks are easily recognizable and cause significant damage over time, especially to your precious belongings.

When silverfish feast on these materials, they leave behind irregular shapes or notches, which can be highly unsightly. For example, prized books in your collection may end up with chewed bindings or torn pages.

Some of the damages caused by silverfish include:

  • Tattered clothing, especially made from natural fibers
  • Damaged wallpaper with noticeable feeding marks
  • Worn out carpets with bald patches or chewed fibers

Here’s a brief comparison of the items silverfish affect:

Items Damage Type Severity
Paper Feeding marks, holes Medium
Books Chewed bindings, torn pages High
Cardboard Notches, holes Medium
Clothing Tattered, holes High
Wallpaper Peeling, feeding marks Medium
Carpet Bald patches, chewed fibers High

Keep an eye out for such damages around your home, and take necessary measures to prevent an infestation of silverfish from escalating. Remember, a friendly approach towards maintaining your house’s cleanliness can go a long way in keeping these pests at bay.

Common Places to Find Silverfish

Silverfish can often be found in moist and dark areas of your home. They are attracted to places with high humidity levels, such as your basement or laundry room. Besides moisture, silverfish are also attracted to food sources, especially items containing starches and proteins. Some common household materials that these pests might feed on include paper, books, and cardboard.

For example, you might notice silverfish near your bookshelves, hiding within the pages of your favorite novels. Additionally, they may also reside under carpets, behind wallpaper, or along the baseboards in your house. They are known to slip into small cracks and crevices, using these spaces for shelter and feeding.

It’s crucial to inspect areas around windows and doors, as these locations can provide easy entry points for silverfish. Common hiding spots are within the tiny gaps around windows and frames, or any other openings that they can squeeze through.

To summarize, silverfish are typically found in:

  • Moist areas (basements, laundry rooms)
  • Dark, secluded spaces (cracks, crevices)
  • Near food sources (paper, books, cardboard)
  • Around windows and doors

By checking these locations in your home for silverfish, you can identify and address any infestations before they become a more significant problem.

Diet of Silverfish

Silverfish are attracted to your home mainly due to their dietary preferences. They are known to consume a variety of items that are rich in starch, carbohydrates, and protein. Let’s dig a little deeper into the silverfish’s diet to understand why you might have them in your house.

Silverfish feed on a range of materials that are commonly found in households. Some examples of their food sources include:

  • Flour
  • Rolled oats
  • Cereals
  • Leaves
  • Cotton
  • Newspaper
  • Cardboard boxes
  • Silk

These insects crave starchy and carbohydrate-rich items because they provide energy and nutrients for their survival.

When it comes to protein, silverfish seek out materials like

  • Dead insects
  • Silk

This helps them grow and reproduce. In addition to these items, they are also known to consume anything that is rich in cellulose, such as leaves or cardboard boxes.

These preferences might explain their presence in your home. By understanding their dietary needs, you can take steps to minimize the availability of their preferred items to discourage their infestation. To sum it up, silverfish are attracted to your home due to the presence of carbohydrates, protein, and starchy materials. Keeping these items out of reach or properly storing them can help reduce the likelihood of a silverfish infestation.

Negative Impacts of Silverfish

Silverfish can cause various problems in your home. They are drawn to damp environments and are usually found in bathrooms, kitchens, and basements.

Damage: These pests are known to damage a variety of household items. They feed on carbohydrates, like starches and sugars, which can be found in things like paper, glue, and fabrics. Their feeding habits may result in damage to your books, wallpaper, and clothing.

Health Concerns: Though silverfish do not pose a direct threat to humans, they can indirectly impact your health. Their feces, droppings, and shed scales can become allergens in your home, especially when they accumulate over time. This can lead to allergic reactions, respiratory issues, and skin irritation in some people.

  • Allergic Reactions: People with sensitive systems might experience symptoms like sneezing, runny nose, or skin rashes when exposed to silverfish allergens. Keep in mind that everyone’s immune system is different, so the severity of the reaction may vary from person to person.

  • Pest Attraction: Another unpleasant aspect of having silverfish in your home is that they might attract other pests. Their presence may lure in spiders or other insects that feed on them, and can increase the overall pest population in your home.

To summarize, silverfish bring about negative impacts in your home, such as:

  • Damaging household items
  • Causing allergic reactions
  • Attracting other pests

To prevent or control silverfish infestations, it’s essential to address any moisture issues in your home and store food, clothing, and paper items properly.

Prevention and Control of Silverfish

Controlling moisture is a key factor to prevent silverfish infestations. Use a dehumidifier to reduce humidity levels in your home. Ensure proper ventilation in bathrooms, kitchens, and basements.

  • Traps: Set traps like glue boards along walls, near cardboard boxes, and in dark areas.
  • Diatomaceous earth: Sprinkle it near entry points and potential hiding spots.
  • Boric acid: Apply it along baseboards, cracks, and crevices where silverfish may hide.

Vacuum regularly to pick up dust, eggs, and silverfish themselves. Seal gaps in walls, baseboards, and around pipes with caulking to prevent silverfish from accessing your home.

Protect your belongings:

  • Use airtight containers for food and other items.
  • Store clothes and fabrics in sealed plastic bags.
  • Avoid stacking newspapers, magazines, and cardboard boxes.

In case of a severe infestation, call a professional pest control service. They may use pesticides or extermination methods to eliminate the silverfish population in your home.

Maintaining a clean and dry environment is crucial for preventing silverfish. By following these guidelines, you can keep your home silverfish-free and protect your belongings from damage.

Home Remedies for Silverfish Infestation

Silverfish can be quite the nuisance in your home. Luckily, there are several home remedies to help you get rid of them. Here are some effective solutions that you can try:

Caulk and Seal: One way to prevent silverfish is by sealing all cracks and crevices in your home. Caulking around windows, doors, and baseboards will help keep these pests out.

Natural Repellents: Certain natural materials can deter silverfish from settling in your space. For example, cedar and dried bay leaves are known to be effective repellents. Additionally, you can use cinnamon or cloves as a natural solution to keep them at bay.

Boric Acid: This classic remedy can be quite helpful against silverfish infestations. Carefully apply boric acid powder around areas where you suspect silverfish activity. Always keep boric acid away from children and pets, as it can be toxic if ingested or inhaled.

Sticky Traps: Placing sticky traps around your home’s corners, behind furniture, and near baseboards can help capture and eliminate silverfish. These traps are effective and can be purchased from your local store or online.

Cedar Oil: Another natural repellent, cedar oil can be used to deter silverfish from invading your belongings. You can apply a few drops to cotton balls and place them in areas where you’ve noticed the pests.

Fans and Dehumidifiers: Silverfish thrive in humid environments. To reduce humidity levels in your home, consider using fans, dehumidifiers, or opening windows for ventilation. This will help create an environment that is less suitable for these pests to survive.

Cleaning and Disposal: Regularly washing your curtains, vacuuming, and removing any old books or papers from your home can make your living space less attractive to silverfish. Maintain a clean and clutter-free environment to minimize their presence.

Spiders: While it might not be the most appealing solution, some non-poisonous spiders can help control silverfish. As a predator of silverfish, spiders can play a helpful role in keeping their population in check.

Remember to be patient while trying these methods. It can take some time to notice results, but with persistence, you’ll be on your way to a silverfish-free home.

Reader Emails

Over the years, our website, whatsthatbug.com has received hundreds of letters and some interesting images asking us about these insects. Scroll down to have a look at some of them.




Dear Silverchicken,
I think your sister was pulling your leg. Earwigs, on the other hand, have a reputation for seeking
refuge in ears, hence their name. Earwigs will not burrow or do any permanent damage, they are just
seeking shelter. No need to fear silverfish or earwigs.

Letter 2 – SILVERFISH!


Hi, I currently had the most unfortunate experience of discovering a silverfish in my bathtub. It is one of two that I have seen sense I moved in in November. My apartment is old with steam heating and hardwood floors, So the option of dehumidifying is not really an option. I have spent many frantic hour on line trying to find out how to get these little darlings out of my apartment. My problem is this …I found much conflicting info on them. Such as "there is no way of truly eliminating silverfish" to "two silverfish are nothing to worry about" and "silverfish will not generally eat clothing" to "you should perchance silverfish traps to put in your drawers" So what’s the deal? Any info you could give would help. I’m at a point of hysteria (have you seen a yuckier looking bug) and very worried about my clothing collection. Thank you very much and also if moving away and starting over is my only option at this point I’m okay with that…..:)


Dear Steph,
Silverfish, which belong to the order Zygentoma, are also sometimes known as firebrats because of their love of warmth. According to expert F. Lutz, "If such a creature is eating your wallpaper, starched clothes, photographs or other belongings, your sorrow may be mitigated by your interest in seeing the most primitive insect you are likely to observe without special effort. Further damage may be prevented by fumigating or by liberal use of fresh Pyrethrum powder". If you move, be sure to not take along any hitch-hikers. We once had a lengthy correspondance with Miss Swanlund who was worried that her lovely Hollywood starlet apartment was infested. She eventually moved, leaving the vermin behind.

Letter 3 – Silverfish


identify bug
Wed, Oct 22, 2008 at 1:03 PM
This bug is found sometimes in the bath tubs or the sinks in my house so I assume they are coming from the drain. How can I get rid of them?
Tubs and Sinks in Bathrooms


Hi Rich,
This is a Silverfish, long considered a household pest.  The person who can figure out how to safely discourage them from entering and infesting homes will be an instant millionaire.

Letter 4 – Silverfish


Strange Cockroach (?)
Thu, Jan 15, 2009 at 10:41 AM
I keep seeing these bugs in my bathroom which vary greatly in size. they run between being less than a centimeter in size to almost half an inch. They have long antennae coming out of both ends and it seems sort of furry around the head area and are yellow/gold with black/grey spots. It almost seems like an immature kind of beetle. I finally caught one to post a picture, they are unbelievably fast! Sorry the photo isn’t closer or more clear, they move like there’s no tomorrow! Can you please tell me what these creepy bugs infesting my bathroom are!?
Taylor W.
Denver, Co


Hi Taylor,
You have Silverfish, a common household pest. You can find much information online about the difficult to eradicate Silverfish.


  • Bugman

    Bugman aka Daniel Marlos has been identifying bugs since 1999. whatsthatbug.com is his passion project and it has helped millions of readers identify the bug that has been bugging them for over two decades. You can reach out to him through our Contact Page.

    View all posts
  • Piyushi Dhir

    Piyushi is a nature lover, blogger and traveler at heart. She lives in beautiful Canada with her family. Piyushi is an animal lover and loves to write about all creatures.

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Tags: Siverfish

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7 Comments. Leave new

  • Pretty sure by that picture its a Firebrat…google it and you’ll find ways to get rid of them.

  • I constantly spent my half an hour to read this web site’s content every day along with a cup of coffee.

  • The best part about this is it is harmless to other
    pets at home, harmless to house plants and leaves a pleasant citrus
    like smell around the home. Their diets consist of carbs, starches and protein.
    Ensure that any flour and sugar spills are cleansed up, to
    ensure that they do not have any food.

  • The best part about this is it is harmless to other
    pets at home, harmless to house plants and leaves a pleasant citrus
    like smell around the home. Their diets consist of carbs, starches and protein.
    Ensure that any flour and sugar spills are cleansed up, to
    ensure that they do not have any food.

    • While we cannot endorse your guide as we have not seen it, we are happy to include your comment which did not include a link to your site.

  • Nicky. Mcdermid
    November 10, 2017 8:40 am

    Hello. I am trying to ID a black 1/2″ long x 1/8″
    worm like thing that was stinging my leg for several seconds. Freaked my it I brushed it away +could not find it. 2 weeks ago it was a small pink dot now it’s very itchy and close Tia 1″ circle. I didn’t see any detail on this worm like shape. Thought maybe a silverfish. Do I need a doctor visit?


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