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Recognising damp and mould

Damp means wetness that’s not supposed to be there. There are two main kinds of damp you might find in your home: rising damp and penetrating damp.

Rising Damp

This happens when water from the ground moves up through the walls of a building on the ground floor. It’s like water traveling up through tiny tubes in the bricks. This water can damage walls and bring up salts too.

How to Spot Rising Damp

Look for these signs inside your home:

  • Walls with falling plaster and paint.
  • A stain on the wall, like a line, where the ground water reached.
  • Salts showing up on the wall’s surface.

Penetrating Damp

This occurs when water gets inside your home through cracks or other problems outside, like missing roof tiles or broken seals around windows and doors. Water can come in through walls, roofs, windows, or doors at any level of the building.

penetrating damp

How to Spot Penetrating Damp

Watch for these signs:

  • Random wet patches on walls near where water came in.
  • These patches can grow bigger when there’s more water.
  • You might see damp salts on the wall too.

What can I do about it?

You should treat any mould you may already have in your home then do what you can to reduce condensation to prevent it from re-forming or spreading. Find out how to do that here.

If you can’t fix a big damp problem on your own, ask for help. Trivallis will send someone to check and figure out what to do. It’s important to keep your home dry and healthy.