Rising Damp in Birmingham

Rising damp is moisture from the ground travelling up through the walls of a building by capillary action, seeking a means of evaporation. The water also contains salts that also travel up through the wall. This type of moisture only occurs on the ground floor.

Rising Damp can develop within a building that is not protected by a properly installed damp-proofing course or due to the omission of damp proofing during earlier construction or renovation. A properly installed damp proofing course will prevent ground water from travelling up the wall by creating a barrier in the wall, made from impermeable and water-resistant materials.

If left untreated, rising damp can lead to serious problems in your property such as destroying decorative finishes within the property or leading to structural damage. It can also contribute to increased heat loss. As with most forms of damp, long-term exposure to damp is injurious to health.

Signs of Rising Damp

You can identify rising damp by looking out for the following signs ؛

  • Mortar crumbling and/or salt deposits on the external walls of the property
  • Tide marks – up to the height where the water has reached in the wall, which can be up to 1m above the skirting board in some cases.
  • Damp staining/patches – yellowish/brownish in colour and up to 1m above the skirting board.
  • Blistering paint or peeling wallpaper – usually coming loose from the skirting boards.
  • Salts blooming on the internal surface of a wall causing paint to bubble or white fluffy deposits be left on the surface.
  • Decaying timber such as floor boards or skirting boards – look out for cracked or crumbling skirting boards or damaged paint.
  • Black Mould
  • Damp, musty smell.

Treatment

To correctly treat rising damp, a damp specialist should carry out a survey, based on which they recommend the most appropriate treatment. There are two ways to treat rising damp; which is either by installing a physical damp-proof membrane or through chemical DPC injections.

Chemical DPC injections is a water-based cream that contains no hydro-carbon solvents. Once the cream is injected into the wall it reverts into a liquid, which allows it to infuse into the bricks and absorb the moisture within the wall. As the cream cures it creates a water – repellent barrier, that stops water rising up the wall. Chemical DPC injections are highly effective at treating rising damp and provide long-lasting protection.

The general process to treat rising damp is as follows

  • 1. To begin with all affected plaster and materials on the walls are removed, to approximately one meter or higher, depending on the salts within the masonry. It is important to remove all affected plaster work as it is likely to contain salts, which will continue to attract moisture unless fully removed,
  • 2. Secondly, an anti-sulphate solution is applied to the wall. The solution is designed to penetrate into the surface and neutralise any salt present. It also creates an insoluble barrier against further salt movement into the surface.
  • 3. Next, the DPC cream is injected by an applicator gun, into a series of specially positioned holes drilled into the wall.
  • 4. After that, tanking slurry is applied to the wall. Tanking slurry is polymer modified cement coating, which provides an extra layer of protection and sealant.
  • 5. Once the treatment is complete, the wall will be re-plastered and re-skimmed. If you suspect or have identified that you have a rising damp issue and need it resolved, then call Damp Zone today on 0121 690 1111