Below Ground & Rising Damp


Below ground waterproofing is one of the most important parts of the whole build process. If this waterproofing system fails, the structuralintegrity of the building can be compromised. Failed below ground waterproofing is a leading type of waterproofing failure, at times evencompletely left out of the build process. When these areas pose a problem or start to leak the repair bills can sky rocket as the repair usuallyinvolves excavating the soil to access the below ground areas. Below ground waterproofing systems are complex compared to internal orexternal non exposed areas as the membrane must be; root resistant, non degradable, high resistance to re-emulsification and resistant tosalts and minerals. A typical below ground waterproofing system consists of a liquid membrane, either cementitious in make up or bitumenmodified, a protection board, drainage cell and filter media followed by a back fill containing an ag line and blue metal.

Rising damp is a phenomenon where part of a building is below ground and the ground moisture and water wicks up and through thesubstrate from the soil. The pressure of the water is known as hydrostatic pressure.

Rising damp can have implications such as:

  • Structural Damage through constant saturation of the substrate, whether it be concrete or timber. Concrete cancer, spalling androtten concrete reinforcement can result from constant saturation and can be very costly to repair. Timber can rot or decay anddevelop mold, affecting the structural integrity of the dwelling.

  • Health implications through the growth of mold. The constant wet conditions are the perfect environment for mold to thrive. Certainmolds are not visible to the eye and can wreak havoc on your health.

  • Damage to your personal belongings and potential decrease in your homes value. Water damage, typically below ground is usuallydamage to your foundations or weight bearing walls. It is very important that these stay rigid and free from water damage. Homeswith water damage can be very costly to repair therefore the value of your home or dwelling can be considerably reduced whenwater damage is present.

Able Waterproofing offers many solutions for rising damp and groundwater issues and below ground applications, from both the positive andnegative sides. Common products used are:

  • Hydrostatic Epoxies

  • Cementitious Membranes

  • Bitumen modified Polyurethanes

  • Sheet Membranes

  • Cement based water plug mortars

  • Polyurethane injection


Click to call for your FREE waterproofing quote