Rising Damp

rising damp proof course chemical injection electro osmosis dpc northern ireland NIDamp within our homes and buildings can generally be classified into 3 types (rising damp, penetrating damp & condensation), each of which has a distinct solution; it is therefore imperative that one of our experienced surveyors carries out a full survey of the property prior to any remedial works being carried out.  

It is important to note that leaking pipes can also cause damp; our experienced surveyors are adept at identifying the root cause of the problem.

Rising Damp

Rising damp only affects ground floor walls.  If the damp problem is at first floor, or above, then it is possible that the cause is condensation or penetrating damp.

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Signs of rising damp include:

  • horizontal 'tidemarks', generally less than 1m in height, where the wall is discoloured, with general darkening and patchiness;
  • white effloresence, loose wallpaper, and deterioration to plaster;
  • signs of skirting boards deteriorating or rotting.

Common Causes of Rising Damp

Rising damp is caused by the capillary action of water being drawn up into porous masonry from wet ground. Masonry naturally acts like a sponge, soaking up water that exists in the ground.  New buildings will have a damp proof membrane, however, older, solid walls are unlikely to have this.  Common causes of rising damp are:

  • absence of a damp proof course, common in older buildings,
  • the bridging of the damp proof course; eg  either in the cavity by mortar, or externally by rubbish or soil piled up against the outside of the wall

Rising Damp is generally treated by one of three methods: Electro-Osmosis DPC, Chemical Injection DPC, or Newlath Damp Proof Membrane.  Our trained surveyors will carry out a detailed survey and can advise on the best solution.  We provide an insurance backed guarantee for all remedial damp works carried out.