The Short Answer
Find where the larvae are, vacuum thoroughly and repeatedly, deal with stored wool, and treat the rooms. The adults flying about are not the problem and killing them changes nothing.
Treatment is £180 first room, £60 per additional room.
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Getting Rid of Carpet Moths – Quick Answer
Step 4
Deal with stored wool
Step 1: Move the Furniture
The first and most productive thing you can do, and it costs nothing but a bad back.
- Move the sofa — properly, right out from the wall
- Move armchairs, sideboards and anything static
- Lift every rug and look under it
- Pull out under-bed storage and look beneath
- Open the corner behind a permanently open door
- Look along the skirting edges all the way round
- Check the sides of the stair treads
In most cases the damage is found within ten minutes of doing this, and people are surprised by how much of it there is.
Step 2: Identify What You Have Found
- Smooth cream larvae, up to about 10mm — carpet moth
- Silk webbing or small silk tubes across the pile — carpet moth
- Brown bristly larvae with shed skins — carpet beetle instead
- Bare patches with the pile grazed to the backing — either
- Small pale moths that scuttle rather than fly — carpet moth adults
Read nextSmall Moths Around Carpets in Edgware – What Are They? →
Step 3: Vacuum Properly
- Crevice tool along every skirting, slowly
- Under furniture, not around it
- Both sides of every rug, and the floor beneath
- The sides of stair treads and under the gripper line
- Under beds and inside wardrobe bases
- Repeat every few days for several weeks
- Empty into a sealed bag and put it outside every single time
Step 4: Deal With Stored Wool
Frequently the actual source, and the step people skip because the damage they noticed was in the carpet.
- Empty the wardrobes of wool, cashmere and silk and inspect every item
- Check the base and corners of wardrobes for larvae and casings
- Check suitcases, under-bed boxes and the airing cupboard
- Check the loft — stored blankets, rugs and old clothing are a classic source
- Hot wash anything washable
- Freeze what cannot be washed — sealed bag, domestic freezer, a couple of weeks
- Dry clean valuable items that take neither
- Store clean and sealed afterwards — soiled wool is far more attractive than clean
Step 5: Treatment
Treatment reaches the base of the pile, carpet edges and under-furniture areas where the larvae actually are, and remains active as further eggs hatch.
What Does Not Work
- Killing the adults. They do not feed and do not damage carpet
- Mothballs. Unreliable against an established infestation
- Cedar blocks. Popular, largely ineffective once larvae are established
- Shampooing or steam-cleaning the carpet. Cleans it, does not clear the larvae
- Supermarket sprays alone. Surface-level; larvae are at the pile base
- Pheromone traps as treatment. They catch male adults; useful for monitoring only
- Treating the carpet while ignoring the wardrobe or the loft
In a Terrace or a Conversion
Less of an issue than with rodents, and worth a brief note.
- Carpet moths do not travel between properties the way mice do
- They spread along continuous carpet within a property
- A shared loft space with stored wool is the one genuine cross-property risk
- Second-hand rugs and furniture are a far more common route in
- Which means this is generally your problem to solve alone — and you can
Afterwards
- Resume frequent vacuuming, edges and under furniture especially
- Move furniture periodically rather than leaving it static for years
- Store wool clean and sealed
- Consider pheromone traps as a monitor — they give early warning
- Check under rugs occasionally
Related Questions
How long does it take?
Activity reduces within a couple of weeks. Treatment stays active as further eggs hatch.
Do I need to lift the carpet?
No.
Will the damaged patches recover?
No. Wool that has been eaten does not grow back — which is the argument for dealing with it early.
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