Woodlice (Pill Bugs) Indoors: A Moisture Warning Sign

Small grey, roly-poly creatures indoors mean damp conditions.

The short answer

Woodlice need moisture and feed on decaying matter. Indoors, they signal damp areas, leaks, or rotting wood. They are harmless to people but point to problems worth fixing. Fix leaks, improve ventilation, remove debris, seal gaps and dry damp areas.

What they show

• Damp spots and leaks.
• Rotting wood or organic debris.

Fix

1. Repair leaks and improve ventilation.
2. Remove damp debris.
3. Seal gaps.
4. Use a dehumidifier if needed.

When to call a professional

If the problem is widespread, keeps returning or you are unsure what you are dealing with, a professional inspection will save time and avoid wasted effort.

Frequently asked questions

Are they harmful?

No.

Do they damage wood?

They feed on decay, indicating problems.

Will they go away?

Once moisture is fixed.

Are they bugs?

They are crustaceans.

This guide is part of IPest's complete resource on household pest control. For identification help, prevention and treatment options, see our full household pest control guide for Bangalore.