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Carpet moth spray for the edges, not the middle of the room

Updated: 23 October 2026

The middle of the carpet looks fine, and the bald patch is a hand's width from the skirting, or a pale crescent under the sofa. Carpet moth larvae feed in wool that stays dark and still. This page is about a carpet moth spray for those edges. The Products Compared editorial team set the six amazon.co.uk listings in our [moth spray comparison](/hub/pest-control/moth-spray) against English Heritage's notes on edges and underlay. We did not lift a carpet or run a residue test. Prices are captured GBP shelf prices. A qualifying purchase can earn us a commission at no extra cost to you.

The middle of the carpet looks fine, and the bald patch is a hand's width from the skirting, or a pale crescent under the sofa. Carpet moth larvae feed in wool that stays dark and still.

Our top picks

Acana Acana fresh linen 500 ml

Best overall

Acana Acana fresh linen 500 ml
9.0/10about £13.49
View offer
Zero In Zero In ZER434M six-pack

Rank 2

Zero In Zero In ZER434M six-pack
9.1/10about £17.21
View offer
Acana Acana lavender 275 ml

Alternative

Acana Acana lavender 275 ml
8.9/10about £8.68
View offer
On this page
  1. 1.Where carpet moth larvae actually sit
  2. 2.Vacuum the edges before you spray
  3. 3.Which listing is even for carpet
  4. 4.What a surface spray cannot reach

Where carpet moth larvae actually sit

Larvae want wool that is not walked on. English Heritage describes damage at undisturbed edges, under furniture, and in wool underlay. The centre of a living room is vacuumed and trodden, so it can look normal while the perimeter thins. Case-bearing larvae also work under pieces with no legs, where a weekly hoover never reaches. If the pile is synthetic and the loss is only at a join, you may be looking at wear, or at a beetle rather than a clothes moth. The Acana listings name carpet beetles as well as moths. If you cannot tell a case from a grub, stop and get an identification before you treat the whole floor.

Vacuum the edges before you spray

Vacuum those places before you think about a can. Use a crevice tool along the skirting, under the sofa, and where a rug meets fitted pile. Move the furniture. A Pest Control Direct note, that seller's view and not a dose on any of our six listings, talks about a band about 500 mm out from the skirtings, especially on external walls. Use it as a picture of where to look and vacuum. Do not set a spray rate from it. Empty the vacuum outside, as the wardrobe method does, because a dust compartment full of larvae is still an infestation indoors. Wardrobe steps stay on how to use moth spray.
Acana Acana fresh linen 500 ml

Testsieger

Acana Acana fresh linen 500 ml
9.0/10about £13.49
View offer

Which listing is even for carpet

Three Acana listings name carpets, curtains, and cushions, and they name carpet beetles. They say they kill moths, eggs and larvae, they name transfluthrin, and they claim to be non-staining, on a three-month cycle. Only the 500 ml fresh-linen spray states an area: about 13.75 square metres, at £13.49 and 4.4 from 277 reviews. That is the only coverage figure in the set. Lavender 275 ml at £8.68 and fresh linen 275 ml at £8.95 state no square metres. Reviewers say a 275 ml bottle was used up on one treatment. Zero In's bullets say wardrobes and drawers. The six-pack is £17.21 and is the top pick for that wardrobe job. Some reviewers also sprayed carpets. That is what buyers did, not what the specification states. Rentokil PSC100 at £5.90 has no where-to-use line. Clothes Doctor, £15.49 for 250 ml, is a knitwear mist. If you want the listing that names carpet and states an area, it is the 500 ml Acana, with the trigger fault reviewers report.

What a surface spray cannot reach

A mist on the pile does not treat wool underlay. English Heritage is plain that larvae live there, and that a residual insecticide works only if it contacts them. Contact on the pile you can see is not contact on the felt under a fitted carpet. If the carpet is glued, peeling it back is not a Saturday job. Do not cut a hole to pour spray through. Furniture goes back when your label says the surface is dry. None of the six listings states a minute count. Acana's listed cycle is three months. Large rugs may need commercial cold or controlled heat. If you are wondering whether a glue card would have been enough, moth spray vs moth trap answers that first.

Common questions

Why is the damage only at the edges?
Larvae feed in wool that stays still. English Heritage points to undisturbed edges, the space under furniture, and wool underlay. The middle of the room is walked on and vacuumed, so it can look sound while a strip along an external wall is threadbare.
Which sprays in this set name carpets?
The three Acana listings do: carpets, curtains, and cushions, plus carpet beetles, with transfluthrin named. Zero In's bullets say wardrobes and drawers. Rentokil does not state a place to use the can. Clothes Doctor is a knitwear mist. Only the 500 ml Acana states an area, about 13.75 square metres.
How much area does any listing actually state?
About 13.75 square metres, and only on the Acana 500 ml fresh-linen spray at £13.49. No other listing here gives square metres. A 275 ml can has no figure at all. Reviewers say the smaller bottle finished during one treatment.
Will spray fix wool underlay?
No. A surface spray does not reach wool underlay under fitted pile. English Heritage notes larvae in that layer, and a contact insecticide only works where it touches them. If the carpet is glued down, lifting it is not a household spray step.
Should I lift the carpet?
Lift a loose rug so you can vacuum both sides. Do not pull up a fitted, gripped, or glued carpet to chase larvae with a domestic can. A crevice tool at the edge is the household step. Looking under the carpet is for a fitter or a pest controller when the underlay is involved.
When is a carpet job too big for a can?
When the damage is in the underlay, across several rooms, or in a large rug that will not fit a domestic freezer. English Heritage points those rugs to commercial cold or controlled heat. About 13.75 square metres is the largest area any can in this set states.

Related pages

Clothes moth killer spray buying guide

Moth spray

Best clothes moth spray: top pick and who should skip

How to use moth spray without missing hidden larvae

Moth spray vs moth trap: which one touches the larvae

Sources

Public UK sources used for this comparison. Shelf prices, stars and review counts are the amazon.co.uk figures captured for these six listings. Last checked 19 October 2026.

  1. Natural History Museum clothes moth guide (retrieved 19 October 2026)
  2. English Heritage clothes moth guideline (retrieved 19 October 2026)
  3. HSE using biocides (retrieved 19 October 2026)
  4. BPCA moth control advice (retrieved 19 October 2026)
  5. Southwark Trading Standards mothball leaflet (retrieved 19 October 2026)
  6. Which? how to get rid of clothes moths (retrieved 19 October 2026)
  7. Rentokil DIY moth products (retrieved 19 October 2026)
  8. STV 2024–25 catalogue (retrieved 19 October 2026)