Spiders, ants & crawling insects
Silverfish control in Salt Lake City, UT
Silver, fast and gone the moment the bathroom light comes on. Silverfish and firebrats live in the damp or warm corners of older homes, and they chew paper, glue and stored fabrics.
Most active
- Spring
- Summer
- Fall
- Winter
Quick answer
Silverfish control in Salt Lake City focuses on the voids where they live: gaps along bathroom and basement baseboards, plumbing chases, storage rooms and the warm space around furnaces and water heaters, where firebrats settle. We treat those voids with dusts and baits, and pair it with lower humidity and better storage so they don't rebuild.
At a glance
- Best for
- Silverfish in bathrooms and basements, firebrats near furnaces
- What they damage
- Paper, book bindings, wallpaper paste and stored fabrics
- How it works
- Dusts and baits in voids plus humidity and storage fixes
- Visit length
- About an hour for most homes
Overview
Where silverfish hide, and what they eat
Silverfish need humidity and shelter. They live in wall voids, behind baseboards, under bathroom fixtures and in storage rooms, and come out at night to feed on starches: paper, book bindings, wallpaper paste, cardboard, stored clothing and crumbs.
Firebrats are close relatives that prefer heat instead of damp. They settle around furnaces, water heaters, boilers and warm pipe runs, which in Salt Lake homes usually means the basement mechanical room.
Because both hide in voids, surface sprays do little. Treatment puts dusts and baits into cracks, voids and plumbing gaps where they live, and the long-term fix is lower humidity and storage in plastic bins instead of cardboard.
Your options
Silverfish treatment options
| Option | Best for | How it works | Trade-off |
|---|---|---|---|
| Void dusting | Baseboards, plumbing chases and wall voids | Fine dust reaches where they hide and lasts a long time | Needs access to gaps and voids |
| Baits | Storage rooms and closets | Starchy baits in small placements | Slower acting |
| Humidity and storage fixes | Every case | Dehumidifier, plastic bins, fewer paper piles | Changes on your side of the job |
Cost
What silverfish control costs
Priced like a general indoor treatment.
Published range
A general exterminator visit typically runs about $100 to $260. Source: angi.com, checked September 2026.
How many rooms
Bathrooms, basements and storage rooms each add treatment time.
Storage clutter
Boxes and paper piles give silverfish more shelter to treat around.
Humidity
Damp basements keep populations going until moisture is reduced.
Firebrats
Furnace and water heater areas need their own attention.
Follow-up
Large populations in older homes may need a second visit.
What it covers
Silverfish problems we handle
Bathroom and basement silverfish
Treatment along baseboards, under fixtures and in plumbing gaps where they shelter.
Storage box and book damage
Storage rooms, closets and bookshelves where silverfish feed on paper and bindings.
Firebrats near furnaces
The warm mechanical room around furnaces, boilers and water heaters.
Do it yourself?
What keeps silverfish down
What you can do today
- Run a dehumidifier in the basement and use bathroom fans.
- Move stored papers, books and clothing into sealed plastic bins.
- Fix leaky pipes and dripping faucets.
- Vacuum closets, shelves and storage rooms regularly.
What to leave alone
- Storing old cardboard boxes on basement floors.
- Leaving stacks of newspapers and magazines in damp rooms.
- Spraying surfaces, which misses the voids they live in.
- Ignoring a musty basement smell.
How the visit goes
How a silverfish treatment goes
Find the harborage
Bathrooms, basements, storage rooms and the furnace area.
Check moisture
Leaks, humidity and bathroom ventilation that keep them going.
Treat the voids
Dusts in baseboard gaps, plumbing chases and wall voids.
Bait storage areas
Small bait placements in closets and storage rooms.
Advise
Humidity and storage changes that stop them rebuilding.
Before we arrive
Before your silverfish treatment
- Clear floors along bathroom and basement walls.
- Open access to the furnace and water heater area.
- Move boxes a few inches away from walls.
- Empty cabinets under bathroom sinks.
- Point out damaged books, papers or clothes.
- Tell us where you've seen them and at what time.
- Keep pets out of treated rooms until we're done.
- Show us any leaks or damp spots.
Warning signs
Signs of silverfish
Sign 01
Silver insects in the tub or sink
Silverfish get trapped in slick tubs and sinks overnight.
Sign 02
Chewed paper and book bindings
Irregular holes and scraped surfaces on paper, labels and bindings.
Sign 03
Yellow stains and tiny droppings
Small pepper-like droppings and yellowish marks on stored items.
Sign 04
Insects near the furnace
Firebrats in the mechanical room point to warm, dry harborage.
Sign 05
A damp, musty basement
High humidity lets silverfish populations build.
Salt Lake conditions
Why older Salt Lake homes see more silverfish
About a quarter of Salt Lake City's homes were built before 1940, and the median home dates to 1965. Older plaster walls, gaps behind original baseboards and basement storage rooms give silverfish plenty of shelter. About 20 percent of the city's housing units are in buildings of 50 or more units, where shared plumbing chases let silverfish move between bathrooms. In both cases, the voids behind the walls are where treatment needs to go.
Basement mechanical rooms with a furnace and water heater side by side are where firebrats turn up most often.
Sources: point2homes.com
For spiders, ants and other crawling insects we choose from product lines like these, matched to the pest and where it hides.
- Demand CS
- Suspend PolyZone
- Temprid
- Tempo
- Alpine WSG
- Advion
- Maxforce
- Gentrol
Timing
How long silverfish control takes
- First weekSilverfish contacting dusts and baits start dying off.
- Two to four weeksSightings drop as the population declines.
- A few monthsDusts in voids keep working as long as they stay dry.
- Long termLower humidity and better storage keep them from coming back.
Treat the voids, dry the room
Dusts in the walls and a dehumidifier in the basement beat any spray on the floor.
Call (801) 516-0135Silverfish shelter in the gaps along old baseboards and plumbing.
FAQ
Silverfish control questions from Salt Lake homeowners
Still unsure? (801) 516-0135 is answered around the clock.
They don't bite or carry disease. They damage paper, book bindings, wallpaper and stored fabrics.
They wander at night looking for moisture and food and can't climb back out of slick tubs and sinks.
Silverfish like damp, cool spots like bathrooms and basements. Firebrats like heat and live around furnaces and water heaters.
It helps a lot, since silverfish need humidity. Combined with void treatment, it usually solves the problem.
Yes, over time. Store papers, photos and books in sealed plastic bins, not cardboard.
Dusts placed in dry voids keep working for a long time. Moisture and clutter shorten that.
No. They follow humidity and shelter, which older and newer homes both have.
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