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Woodlice Control

Woodlice are seemingly harmless creatures, but often wander into our homes, causing people to reach for the nearest insect spray. If you want to control or kill woodlice, we have a range of products that will help you do that, from insecticides to silica dust.

  • Woodlice control kit
  • Woodlice insecticidal spray
  • Woodlice dust
  • Woodlice Powder
14 products

The first issue is to deal with any dampness problem that has attracted the woodlouse in the first place.

Woodlice are harmless creatures and if you can brush them up and dispose of them outside, that is the best solution. However, if you feel the need to ensure they do not re-establish in that area, you would be best to use a suitable insecticide spray like Dethlac Lacquer Aerosol.

For a non-chemical solution, use Oak2i spray. Because of the likely damp conditions, non-insecticidal dusts are unlikey to be effective for long.

Use pesticides safely and always read and understand the label

Woodlice are crustaceans related to slaters, shrimps, lobsters and crabs. They are the only crustaceans that have properly invaded land, without the need to return to water in order to breed, although they tend to be restricted to fairly damp places. Woodlice are quite harmless and in fact beneficial in their proper habitat by promoting the breakdown of dead vegetation and organic matter in the soil. They normally live outdoors but shun the light by hiding under stones, logs, loose bark, leaf-litter etc., or in hollow tree-trunks - almost anywhere that is fairly damp. However, they frequently come indoors and may take up residence inside buildings, surviving in any dark, damp places they can find. When large numbers of woodlice are found indoors, perhaps clustered in wall crevices or under skirting boards etc., it is always worth checking for excessive dampness in these places - just in case there is a structural problem with the damp proofing or damp course. There are about 35 species of woodlouse in Britain but the one you are most likely to find indoors is the common Garden Woodlouse.


  • adults are about 15mm ( 1/2 inch) long
  • grey speckled back
  • 13 horny articulated segments
  • small head
  • elbowed antennae
  • seven pairs of short legs
  • and a very short tail
  • breathe through air holes in the hindmost pair of legs

Life cycle:

  • female produces up to 150 eggs
  • they are contained within a pouch in her body until they hatch
  • when hatched they are released into the environment
  • the young woodlouse is about 2mm long and white in colour
  • only one generation per year

Woodlice live in damp places and their natural habitat is woodlands, hedgerows and gardens.

They are occasional visitors into our houses and this is usually because there is a build-up of their preferred habitat just outside the house, ie. a log pile, leaves or other debris.

When they are found in large numbers within buildings, it is always because there is a damp problem, usually caused by a fault in the structure of the building, ie. roof tiles, valley gutters or other drains.

Woodlice cannot live in dry conditions, therefore if the damp problem is resolved, the woodlouse problem will also be resolved.

Supporting Responsible Pest Control

  • Rentokill
  • Pest Expert
  • National Pest Technicians Association
  • Think Wildlife