Rising Damp Treatments

We carry out rising damp treatments and plastering works

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Damp Genius carry out rising damp treatments in Exeter, Torbay, Newton Abbot, Plymouth, Exmouth, Taunton and everywhere in-between.

What Causes Rising Damp

Rising damp describes moisture from the earth being pulled up a wall by capillary action. To give a simple example – imagine dangling a piece of kitchen roll in to some water – what happens? The kitchen roll will suck up the water to form a steady line. This is exactly what happens with rising damp in a solid wall.

rising damp in a wall rising damp exeter torquay plymouth exmouth

The residents of an apartment block in Plymouth complained about the obvious damage to the plaster and paintwork being caused by rising damp.

Damage caused by rising damp on brick wall in exeter

The crumbling bricks and ruined plaster are a clear sign that rising damp is damaging this Exeter Renovation project

Any wall touching the ground can pull moisture up into it. The external and the internal walls sit on the ground and consequently all could have rising damp problems.

Plastic Damp Proof Courses (DPC) are installed at the base modern walls (see picture below) providing a physical barrier to stop water being sucked up the wall. Bitumen or slate damp proof courses were often installed in older homes, unfortunately both of these can break down over time letting rising damp into the property.

What Is Rising Damp And What Are The Key Features

  • Rising damp will show on ground floor walls only
  • Rising damp tends to rise to a maximum of about 1.2m (4ft) from the ground
  • Generally, rising damp forms a steady ‘tide line’ across the wall often with salts visible along the line
  • Rising damp breaks down the paintwork, plaster and brickwork
  • Rising damp is caused by water being pulled up the wall from the ground and is a structural problem
  • New build houses with a visible plastic membrane type damp proof course are very unlikely to have rising damp problems
plastic damp proof course visible no rising damp exeter plymouth torbay south hams exmouth

The black line running along the bricks shown in the picture is a physical damp proof course made of plastic. This type of damp proof course is very unlikely to fail and properties with this should not have rising damp present.

How To Fix Rising Damp

When correctly identified rising damp is always fixable. A typical repair involves removing the wall plaster up to height of 1.2m, injecting a new siliconate damp proof course at the base of the wall and finishing with  new waterproof render and plaster. 

The exact height which we plaster to does vary as it can be influenced by the material the wall is made from, the time the rising damp has been present and just how much water is present in the ground. 

There are some situations where a tanking system or membrane system is more appropriate than an injection. This would be determined on a survey of the property. 

Once works are completed we offer 20 year guarantees that the rising damp will not return. 

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