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Rising Damp

Rising damp is where moisture/water rises through pores in a wall by capillary action, this can be as a result of several building defects which vary depending on the age and wall type of the building.

Rising damp can be as a result of having no damp proof course or a damp proof course which has been bridged/compromised or damaged. Prolonged rising damp problems can lead to fungal decay and insect attack (woodworm) along with spoiling to decorative surfaces such as wallpaper paint etc. salt contamination is common was rising damp, this is where groundwater salts (Chloride and Nitrate) rise up through the wall. These salts are hygroscopic and affect the plaster causing it to bubble and blister.

This causes problems when the moisture penetrates interior finishes and becomes in contact with timber causing decay and rot. Often this moisture will carry salts from the ground (Chloride/Nitrate) and when the dampness evaporates, these salts become concentrated in the plaster and walls. These salts are hygroscopic and can absorb moisture from the air inside the house leaving the walls visibly wet.

Effects of Rising Damp

If the damp walls remain untreated it can cause further problems for the building. Moisture levels may rise to a point at which any timber along the base of the wall may become affected by Dry rot, Wet rot or Woodworm. This can lead to major structural damage and the decay.

Signs of Rising Damp

Rising damp is often misdiagnosed and confused with condensation and water penetration.

The height of rising damp depends on the size of the pore ( the smaller the pore the higher the rise). Therefore, the maximum height rising damp usually reaches is a little over 1m to 1.5m.

If rising damp is present you would see a ‘tide line’ of discoloured staining or bubbling plaster. There may also be signs of dampness and rotting of flooring or skirting board. Damp conditions allow for fungal growth which, not only looks bad and damages finishing’s, it is a health hazard.

  • Flaking Paint
  • Discoloured Staining
  • Bubbling Plaster

Call Us Today

For expert advice call us today on (01) 2340048 (Dublin) or (052) 6128454 (Tipperary).
Alternatively you can email us at

What We Recommend

Almost all modern properties are built with a damp proof course (DPC) placed below masonry walls to prevent rising damp. Some properties may have been built without this damp-proof course or sometimes the existing one may fail which would result in rising damp.

We advise that you get expert advice before making any decisions on treatments.

The process for dealing with concerns of rising damp is very straight forward.

Just contact our office either by email or phone, (we offer a nationwide service so don’t worry). Leave your name and phone number, some details about the property (where it is, roughly what size, whether it’s a Castle or a 3 Bed-semi) and a member of staff will contact you to arrange a survey for damp concerns.

The time involved to conduct varies but usually takes 1-3 hours depending on the size and condition of the property, we then generate a report within 10 working days of the date of the survey which we send to you by post or email it to you as a PDF.

Following that, with your instructions we can provide you with a quotation for the appropriate remedial treatment.