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Silverfish control

Gone from the tub, the closet shelf and the box of old books. Treated where they hide and dried out where they breed.

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Silverfish control in Central Texas: the quick facts

Silverfish need damp air, 75 to 90 percent humidity, and they hide in closets, bathrooms and behind baseboards. They eat paper, glue, starch and flour, can live for years and breed all year indoors. They do not bite. Silverfish are covered on the general pest plan from $66 a month.

What they need
Damp air
Silverfish need 75 to 90 percent humidity.
What they eat
Paper and starch
Books, glue, cardboard, flour and stored clothes.
Risk
A nuisance
Medically harmless, but they damage paper and fabric.
Included in
The $66/mo plan
Silverfish are on the general pest plan.

Written by the Bastion Pest Control service team · Licensed & insured in Texas · Last updated

Silverfish in Central Texas.

Silverfish are wingless, flat, carrot-shaped insects up to 3/4 inch long, covered in fine silvery scales, with two long antennae and three tails. They are fast, active at night and need humid air, 75 to 90 percent, to thrive (Texas A&M AgriLife). A female lays eggs for the rest of her adult life, and a silverfish can live two to eight years.

That is why one silverfish in the tub is rarely the only one. They hide by day in closets, behind baseboards and in stored boxes, and they eat the starch in paper, glue and fabric. Treat the hiding spots and take away the damp, and the population stops growing.

Illustration of a silverfish, silverfish control in Austin, TX

Seasonal pattern

When are silverfish worst in Austin?

Indoors, silverfish breed all year, so there is no true off season. Activity follows humidity, which is why the damp stretches around Austin's two wettest months, May and October, tend to be worst.

Typical silverfish activity in Austin homes by month Silverfish stay active indoors all year. Activity runs moderate through winter, rises with spring humidity to a peak in May, eases a little in the drier middle of summer, and peaks again in October before settling back for winter. January: moderate, active indoors February: moderate, active indoors March: moderate activity April: moderate activity May: high activity, peak month June: high activity July: moderate activity August: moderate activity September: high activity October: high activity, peak month November: moderate activity December: moderate, active indoors DAMP MAY DAMP OCTOBER no off season indoors JanFebMarAprMayJunJulAugSepOctNovDec lowhigh
Silverfish activityPeak months, the dampest of the year
Relative pattern, not a measured local count. Texas A&M says silverfish need 75 to 90 percent humidity and lay eggs continuously once adult, so indoor populations never fully stop. The two peaks line up with Austin's two wettest months, May (5.04 inches) and October (3.91 inches), from NOAA's 1991-2020 Camp Mabry normals in our Austin pest calendar. Sources: Field Guide to Common Texas Insects, silverfish, Texas A&M AgriLife Extension, Silverfish and Firebrats.
Indoors
All year
Females keep laying eggs for the rest of their adult life.
Humidity
75 to 90 percent
Damp bathrooms, laundry rooms and closets are where they settle.
Life span
Two to eight years
A silverfish you see this year can still be there in five.

Warning signs

Small holes, long life.

01

Silverfish in the tub or sink first thing in the morning

02

Ragged holes or scraped spots on paper, books and boxes

03

Yellow stains and tiny pepper-like specks on stored items

04

Shed skins along shelves, baseboards and closet floors

Silverfish point to damp. Run the bathroom fan, fix drips and move stored paper off the floor, then call us at 843-480-8699 and tell us which rooms you find them in.

How we get rid of silverfish.

Bastion Pest Control technician shining a flashlight behind stored boxes on a closet shelf, checking for silverfish
01

Inspect

We find where they hide: closets, stored boxes, bookshelves, baths and the gaps behind baseboards.

Bastion Pest Control technician pushing the tip of a hand duster into the gap where the drain pipe enters the wall under a bathroom sink
02

Treat

Dust in the wall gaps and pipe openings, and treatment along the baseboards where they travel.

Bastion Pest Control technician setting a folded glue monitoring trap on the floor against a laundry room baseboard
03

Monitor

Glue monitoring traps along the baseboards show where they still travel and tell us when they are gone.

Know your pest

The silverfish you might find in Central Texas.

Two look almost the same and turn up in different rooms. Where you find them tells you which one it is.

Silverfish on weathered wood, showing its flat carrot-shaped silvery body, two long antennae and three tails

Silverfish

Lepisma saccharina

The common one. Up to 3/4 inch long, flat and carrot-shaped, silvery to brown with fine scales, two long antennae and three tails. It wants 70 to 80 degrees and damp air, so it lives in bathrooms, closets, laundry rooms and stored boxes, and it can go months without food. Silverfish (Texas A&M)

Silverfish. Silvery scales, three tails.
Firebrat on weathered wood, showing its flat mottled gray and brown body, long antennae and three tails

Firebrat

Thermobia domestica

The silverfish that likes heat. Same shape, but mottled gray and brown instead of silver. Firebrats want it over 90 degrees, so they turn up near ovens, dryers, water heaters and in hot attics rather than in the bathroom. Silverfish and firebrats (Texas A&M)

Firebrat. Mottled brown, found near heat.

Not sure what you have got? Text a photo to 843-480-8699 and we will tell you.

Pest-Free Guarantee

They come back? So do we, free.

Free re-treatments between scheduled visits on any recurring plan.

What it costs

Silverfish control is included in the general pest plan.

Silverfish ride on the recurring general pest plan at no extra charge. The baths, closets and baseboards get treated, and if they show up between visits, the re-treatment is free.

Recurring plan against a single visit, side by side.
 General pest planRecurringOne-time treatmentSingle visit
What it is forKeeping silverfish and the other pests down year-roundClearing one room or one closet
Right for you ifYou keep finding them in the tubYou want one cleanup before you store papers or move
What you getFull TriBarrier™ every visit, foundation, yard and property lineOne full TriBarrier™ treatment
If they come backWe re-treat free, with no limit and no trip feeA return visit is a new charge
Other pests coveredAnts, spiders, cockroaches, scorpions, wasps and rodentsSilverfish only
PriceFrom $66 a month*Quoted per job*

Silverfish live for years and breed all year indoors, so a single spray rarely ends it. Treating the hiding spots on a schedule while the damp gets fixed is what actually holds.

* Starting price. Your exact number depends on home size, lot size and current pest pressure.

Silverfish Control, answered straight.

Are silverfish harmful?

Not to people. Texas A&M calls them medically harmless: they do not bite, sting or carry disease. The damage is to things. They eat the starch and glue in books, papers, cardboard and wallpaper, stain clothing, and get into flour and dry food.

Why do I keep finding silverfish in my bathtub?

Because bathrooms are damp, and silverfish need 75 to 90 percent humidity. They come out at night, slip into the tub hunting for moisture and cannot climb the slick sides back out. It does not mean they came up the drain. They are living nearby, usually behind the baseboards, under the sink or in a closet next door.

How long do silverfish live?

A long time for an insect. Texas A&M puts it at two to eight years, and a female lays eggs for the rest of her adult life, more than 100 in all. Young silverfish grow up in four to six weeks. That is why a few become a lot, and why one treatment rarely ends it.

What is the difference between a silverfish and a firebrat?

Same shape, different color and different room. Silverfish are silvery and like 70 to 80 degrees with damp air, so they live in bathrooms and closets. Firebrats are mottled gray and brown and like it over 90 degrees, so they turn up near ovens, dryers, water heaters and hot attics.

How do I get rid of silverfish for good?

Take away the damp and the hiding places. Run the bathroom fan, fix leaks, use a dehumidifier in damp rooms, and move books, papers and clothes out of cardboard boxes into sealed plastic bins off the floor. Then treat the gaps where they hide, which is the part we handle.

Does the $66 monthly pest plan cover silverfish?

Yes. Silverfish are on the recurring general pest plan from $66 a month at no extra charge, along with ants, spiders, cockroaches, scorpions, wasps and rodents. If they show up between visits, the re-treatment is free.

More questions? Read the full FAQ or get a free quote.

Other pests we treat

One recurring plan covers the everyday pests, add-ons cover the rest, and termites are their own job.

Every plan includes the full TriBarrier™ treatment. See all services →

Answered 24 hours · Austin, TX

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