How do I deal with carpet beetles?
It is the larvae that do the damage, and they live where the vacuum does not reach.
- Difficulty
- beginner
- Time
- 1 hr
- Read
- 2 min
- Safety
- caution
Short answer
The damage is done by the larvae, not the beetles you see. Thorough vacuuming under and behind furniture, along skirting and in wardrobes is most of the treatment, and it has to reach the edges.
Carpet beetles are often mistaken for clothes moths. The adults are harmless and the larvae eat natural fibres — wool, silk, feathers, fur — which is why the damage appears in undisturbed places rather than where you see the beetles.
Safety
Step by step
- Confirm what you have.Small round mottled beetles, and larvae that look like tiny bristly caterpillars, often with shed skins nearby. Clothes moths are a different pest with a similar effect and a different treatment.
- Find where the larvae are.Undisturbed places with natural fibres: under heavy furniture, along carpet edges, in wardrobes, under beds, in old bird nests in the loft, and around fireplaces.
- Vacuum extremely thoroughly.Edges, under furniture, along skirting, inside wardrobes and drawers, under beds. Use the crevice tool along carpet edges — that is where they concentrate. This is the main treatment.
- Empty the vacuum outside immediately.Into a sealed bag, straight into the outside bin. Otherwise you have moved the problem rather than removed it.
- Wash or freeze affected textiles.Hot wash where the fabric allows. For anything that cannot be washed hot, 72 hours in a freezer in a sealed bag kills all life stages.
- Check the loft and around windows.Old birds' nests are a classic source, and adults often gather at windows. Removing a nest can end the problem entirely.
- Treat edges and cracks if needed.An appropriate insecticide along carpet edges and skirting, following the instructions. Only after thorough vacuuming — spraying over debris achieves little.
- Repeat over several weeks.The life cycle means one treatment misses eggs. Vacuum thoroughly weekly for a month before concluding it has worked.
Tips
- Store woollens and natural fibres in sealed containers rather than open shelves. Vacuum-sealed bags are ideal for long storage.
- The adults feed on pollen outdoors and come in through windows. Screens and checking cut flowers helps.
- If damage continues after a month of thorough treatment, get a professional assessment — there is usually a source you have not found.
Questions people ask
What damage do carpet beetles do?
The larvae eat natural fibres — wool carpets and clothes, silk, feathers and fur. The adult beetles do no damage themselves.
How do I tell carpet beetles from clothes moths?
Carpet beetle larvae are bristly and leave shed skins; moth larvae are smooth and leave silky webbing. Both eat natural fibres but need slightly different treatment.