damp walls

damp walls proofingDamp walls from rising damp can occur on both external and internal walls, usually originating from ground water. The wall acts like a wick absorbing water upwards through the bricks and mortar.

Walls in good condition will have an effective damp proof course and damp walls are unlikely to occur unless the damp proof course has in some way been compromised, for example:

  • Due to age and/or original use of poor materials has led to a compromised physical DPC
  • Existing DPC breached by home improvements i.e. addition of a porch, conservatory, adjoining wall etc.
  • External materials i.e. soil, shingle, rubbish against the external wall below and above the DPC
  • Materials within the cavity of a cavity wall construction

If the damp proof course has been breached, action is required to correct this urgently. If left unchecked damp on the upper walls will lead to deterioration of brickwork, internal plaster and décor, leading to mould and fungus.

When internal plasterwork in the home is exposed to damp, it will break down and eventually the damp walls will need to be replaced. This involves removal of the existing plaster and requires a new sand and cement render applied together with the appropriate waterproofing additive and then skimmed with the appropriate finish plaster.

If you think you have rising damp on your walls don’t delay, take action, as penetrating damp can spread quickly if not treated. In some circumstances damp walls can cause problems with your health.

It is highly recommended that a professional remedial survey be carried out to avoid unnecessary costs of repair that may not address the problem. Shields Installations Ltd will provide free surveys and reports with honest advice on your options and the best course of action. Don’t delay call today on 0208 001 0133.