8-18 mm – Slate grey
Crustacean – Low risk
Woodlouse
Woodlice are terrestrial crustaceans (not insects) that live in damp environments. It feeds on decomposing organic matter and plays a beneficial role in the soil. Its presence inside a house generally indicates a problem of excessive humidity. It is harmless, but can be present in large numbers.
§1Distinctive features
How to identify it
Terrestrial crustacean, 8 to 18 mm long, with slate-gray oval segmented body. Some species (Armadillidium) can roll up into a ball like a small suit of armor. 14 legs. Characteristic long antennae.
§2Habitat
Where to find it
It lives in damp, dark places: under stones, woodpiles, compost, dead leaves. Indoors, it can be found in damp basements, bathrooms and laundry rooms.
§3Reproduction
Lifecycle
Without intervention, an infestation can double in size in just a few weeks.
§4What to look out for
Signs of infestation
- Sowbugs found in basements, bathrooms or cellars
- Presence under damp cardboard, stones or wood
- Nocturnal activity - found on the ground in the morning
- Large populations around wet foundations
§5Why act fast
Risks
- No direct health risk (non-biting, non-toxic)
- Reliable indicator of moisture problems in the structure
- Disturbing if present in large numbers
§6Prevention
How to avoid it
- Reducing humidity in basements and cellars
- Keep wood and compost piles away from foundations
- Sealing cracks in foundations
- Improving ventilation in wet areas
- Eliminate sources of decomposing organic matter around the house
§7Pro method
How MW works
Inspection
Home location and assessment.
Preparation
Customized plan – pre-intervention measurements.
Treatment
Locate main and satellite nests, treat with non-repellent baits.
Follow-up
Inspection visit – written guarantee.
§8We answer you
Frequently asked questions
Is the woodlouse dangerous?
No, it’s completely harmless. It doesn’t bite, it doesn’t sting and it doesn’t transmit disease.
Why are there so many in my basement?
Their presence indicates high humidity. Solving the humidity problem is the key to eliminating the infestation in the long term.
How to get rid of it naturally?
Reducing humidity is the most effective method. Salt, diatomaceous earth or bicarbonate placed at entry points can also help.
React quickly, sleep well.
The longer the infestation lasts, the more expensive it becomes.