Penetrating Damp


Penetrating Damp

What is Penetrating Damp?

Penetrating damp is term used for water entering a property from the exterior. It is usually caused by defects in the exterior wall, such as damaged brickwork, pointing, blocked rainwater goods or defective roof coverings. It usually appears as damp patches on inside walls. These patches will usually be concentrated around the area of the defect

Penetrating Damp – what to look out for

  • A damp staining on walls or ceiling.
  • Walls or ceiling having brown coloured patches.
  • The plaster looking crumbly and wet.
  • Black mould spotted on walls or celling.

Any watermarks that appear on walls, windows and ceilings will indicate that there is a penetrating damp problem. When the surveyor checks these areas of the building these areas of damp will show high moisture readings when checked.

Penetrating Damp – Treatment

To remedy penetrating damp, you should:

  • Ensure that gutters and downpipes are not blocked.
  • Ensure windowsills are not damaged (cracks may be letting rainwater in) and make sure the drip grooves are not blocked. This can be caused by a build up of dirt and moss. If found to be blocked, make sure to clean them thoroughly.
  • Penetrating damp is caused by porous bricks or damaged masonry, other treatments have to be considered.
  • To stop penetrating damp affecting masonry, bricks can be treated with Stormdry Masonry Protection Cream. Stormdry is a colourless, water-repellent treatment for brick, stone, masonry, and concrete