Wall Damp Proofing

At Abrogate we strive to deliver a professional service. Our success is due to our exceptional range of expertise in dampproofing and waterproofing. In many cases damp can be encouraged due to poor maintenance; there are several causes of damp, but all can be recovered. If you require wall damp proofing in your home or office, Abrogate provides professional and experienced services. 

Signs of damp include a band or tide mark on the affected wall which is clearly visible or hygroscopic salt deposits, e.g. chlorides or nitrates on the wall surface, bubbling paint or fretting plaster confirm a problem exists or has existed previously. Structural dampness has far-reaching and expensive consequences. 

A complete survey by one of our expert surveyors, aided by an electronic moisture meter, will determine the extent and causes of the damp problem. A complete and proper recommendation is only given after a thorough investigation.

We have treated all types of damp professionally for the past 25 years. 
All Damp proofing work carries a guarantee.

Rising Damp

Rising damp in buildings may be defined as the vertical flow of water up through a permeable wall structure or floor, the water being derived from ground water. The water rises through the pores (capillaries) in the masonry or concrete by a process loosely termed “capillary action.” In other words the masonry acts like a sponge. The treatment method will depend on whether the cause of the damp or rising damp is affecting a solid floor, or is rising up a wall.

Treatment of Rising Damp in solid floors:

This happens most regularly where developers have failed to fit dpc sheeting beneath the slab or when an existing dpc has failed. Several new products are now available to stop Damp rising through floor slabs, notably ECS Epoxy Floor Coating and Dry Base Vapour Membrane. Where the floor slab is contaminated (e.g. oil stains or bitumen) or hydrostatic water pressure is excessive it may be necessary to lay CDM Industrial Membrane over the slab after which a new screed or wooden flooring can be fitted over the membrane.

Treatment of Rising Damp in walls:

Dryzone damp proofing cream, or Microsilan DPC fluid is injected into the wall at floor level to provide an impermeable barrier, preventing the damp rising up the wall. Affected plaster is removed and replaced with a plaster additive or Render guard Gold. An early diagnosis and treatment of rising is vital to avoiding many of the structural and health problems that can be caused by dampness.

Lateral Damp

Lateral damp is when moisture is allowed to enter the structure in a horizontal direction. Gravity then causes the downward movement of the damp into other areas. Penetrating damp can create isolated patches of dampness that increase in size after periods of heavy rain. The damp can occur at any level, unlike Rising Damp which usually rises from the ground up to 1.2 metres high.

Lateral or penetrating damp is usually from a source too difficult to control and only an expert with a moisture metre detector will evaluate the difference in rising and lateral damp. Sometimes the problem may also require a plumber to pressure test the pipes to eliminate them as the problem.

Causes of Lateral Damp:

  • leaking water supplies or waste pipes
  • fretted mortar joints  
  • defective brickwork
  • failure of tile grouts in showers and other wet areas
  • Lack of under tile water proofing membrane in shower cubicles
  • poorly functioning membrane in wet areas
  • cracked render
  • poor flashings  
  • defect in adjacent property outside the owners control
  • air-conditioning or hot water system overflows can also lead  to small localized patches of dampness.

An early diagnosis and treatment of lateral damp is vital to avoiding many of the structural and health problems that can be caused by dampness.

If you would like to find out more about Abrogates wall damp proofing, please contact us!

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