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Carpet And Clothes Moths
Bald patches in a wool carpet under furniture, small holes in knitwear, and little moths in the wardrobe.
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What's happening?
The damage is not done by the moths you see. Adult clothes and carpet moths do not feed on fabric at all — it is their larvae that eat keratin, the protein in wool, silk, feathers, fur and cashmere. That is why the damage appears in the places nobody looks: under a sofa or wardrobe on a wool carpet, along a skirting edge, in the folds of a stored jumper, behind a headboard. Synthetic carpet is largely safe; a wool or wool-mix one is the whole food source. Two species dominate UK homes, the common clothes moth and the case-bearing clothes moth, and the case-bearing larvae leave small tubes of fibre that are often the first thing found. Seeing adults flying means eggs are already being laid elsewhere.
What usually causes it?
- Wool or wool-mix carpet under furniture where it is undisturbed and never vacuumed
- Natural-fibre clothing stored unwashed, since body oils and sweat attract egg-laying
- Dark, still, undisturbed spaces — wardrobe bases, under beds, loft storage, blanket boxes
- Second-hand rugs, textiles, taxidermy or upholstered furniture brought into the house
- Bird or rodent nests in a loft or chimney, which contain feathers and are a classic source
- Wool insulation, felt underlay and old horsehair upholstery acting as a hidden reservoir
- Treating only the visible room, leaving an untouched population in storage or an adjoining space
Is it dangerous?
No. There is no health risk from clothes or carpet moths — the harm is entirely to textiles, and it can be expensive: a wool carpet, a rug or a wardrobe of knitwear. The only real caution is chemical, since amateur moth products vary widely in effectiveness and some are unsuitable for use around bedding and children's rooms. Read the label rather than the packaging claim.
Can I fix it myself?
A lot, actually — this is the most DIY-tractable pest on this list. Move furniture and vacuum the carpet edges, under and behind everything, and empty the cleaner outside. Wash affected clothing at 60°C, or freeze items that cannot be washed for several days in sealed bags. Empty and vacuum the wardrobe, including the base and joints. Store clean natural fibres in sealed containers or garment bags. Use pheromone traps to monitor where the adults are, which tells you where to concentrate. Do not put unwashed woollens into storage.
When should you call a pest controller?
Call a pest controller when the damage keeps spreading after a thorough clean, when a wool carpet is bald in patches across a room, or when you cannot find the reservoir — an unreachable source under a floor, in a loft, or in a bird's nest in a chimney is common and is why treatment fails. Professional treatment applies a residual insecticide to carpet edges, floor voids and harbourage, and can include heat treatment for items that must not be sprayed.
What will the pest controller actually do?
- Identify the species and distinguish moth larval damage from wear, pet damage or beetle activity
- Trace the reservoir, including lofts, floor voids, chimneys and old bird or rodent nests
- Apply a residual insecticide to carpet edges, under furniture, floor voids and wardrobe interiors
- Treat or advise on items that cannot be sprayed, including freezing and heat options
- Place pheromone monitors to measure the population and confirm the treatment is working
- Advise on storage and vacuuming practice, which is what prevents the next infestation
Frequently asked questions
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