A guide to moth treatment.

Treating an established moth infestation in a UK home typically costs £250–£700, depending on property size and infestation severity. Most cases need 2-3 professional visits over 6-12 weeks because moth life cycles run from egg through larva to adult over weeks-months — single treatments often leave eggs that hatch later.

The most damaging UK moth species is the common clothes moth (Tineola bisselliella). Combined with the case-bearing clothes moth and brown house moth, these account for nearly all UK clothing and carpet damage.

Typical UK treatment costs

Treatment methods

• Residual insecticide — sprayed in cracks, behind skirting, in wardrobes, on carpets. Most common approach. Multi-visit needed for complete cycle.
• Heat treatment — heating affected room or whole property to 50°C+ for several hours. Kills all moth life stages in one go. More expensive but single-visit complete.
• Cold / freezing — for portable items (clothes, blankets). Freeze at -18°C for 72 hours kills eggs, larvae, and adults.
• Hot washing — 60°C+ wash kills moths. For items that can be hot-washed.
• Dry cleaning — for delicate items. Solvent kills moth life stages.
• Pheromone monitoring — catches adult males, monitors activity. Not standalone treatment.

Multi-visit programme — why it's needed

Moth life cycle:

• Egg — laid by females, hatches in 4-10 days.
• Larva — the damage-causing stage; lasts 1-3 months feeding on natural fibres.
• Pupa — 1-3 weeks transitioning to adult.
• Adult — lives 1-3 weeks, mates and lays eggs. Doesn't feed as adult.

Standard insecticides kill larvae and adults but not all eggs. Eggs that survive hatch into new larvae weeks later. A 2-3 visit programme over 6-8 weeks ensures repeated treatment hits each emerging hatch.

What to do before the technician arrives

• Vacuum all affected areas thoroughly (bag and dispose immediately).
• Hot wash or freeze infested clothing.
• Move furniture from walls to allow access to skirting boards.
• Remove items from wardrobes (dispose, wash, or freeze).
• Photograph damage for insurance claims if relevant.
• List affected areas to give the technician a clear scope.

Things people often miss

• Sources beyond wardrobes — moth larvae thrive in carpet under heavy furniture, under bed frames, in stored items in attic / cellar. Wardrobes are visible; the real source is often elsewhere.
• Bird nests as moth source — chimney and roof bird nests are common moth sources. If you have unexplained moths, check chimney for nests.
• Heritage items as source — antique fur, taxidermy, hide trophies, vintage uniforms can be silent moth incubators. Check inherited or charity shop items thoroughly.
• Vacuum bag disposal — bagged contents go into outside bin immediately, not back into the vacuum or in household bin.
• Cedar effectiveness limited — cedar wood and lavender are mild repellents at best. Once larvae are established, repellents don't help.
• Storage in plastic, not cardboard — cardboard boxes don't seal moths out; sealed plastic containers do. Don't store woollens long-term in cardboard.

Frequently asked questions

Want a local pro to handle this? A BPCA-member pest control specialist with moth experience handles the multi-visit programme and advises on prevention. The £350-£700 spend is usually less than the value of textiles saved from continued damage.