Damp and Timber Specialists for 50 years

What is Basement or Cellar Tanking?

Tanking is the term given to the installation of a waterproofing system within a basement or cellar.

Basement and cellar tanking systems are applied directly onto the walls and floors of a below ground structure to prevent the passage of ground water through the structure. In essence by covering all surfaces, you are left with a “tank” or shell. Usually basement and cellar tanking is maintenance free, as long as the installation is carried out properly.

When most people think of tanking solutions for basements, they think of a cementitious waterproofing product. This is often the case, but can also including applying liquid rubber products and self healing membranes which mechanically bond to structures. Generally these all come under “Type A” waterproofing systems.

Why Do I Need Basement or Cellar Tanking?

If you intend on using your basement or cellar as a useable space for living in or storage, you may wish to consider installing a basement or cellar tanking system. Due to nature of these rooms being either partially or fully below ground, they are prone to lateral water penetration. That is to say that water from the ground can enter from any point which is below the ground (this differs to rising damp).

Our tanking specialists at Prokil carry out all of their work in accordance with current codes of practice. British Standard Code 8102:2009 gives guidance on the waterproofing of basements and cellars. Part of this code of practice states that it must be assumed that at some point in the structures life that ground water could come to bear against it. If this ground water enters the basement or cellar then the consequences, such as potential flooding, should be considered. If deemed unacceptable then a waterproofing system such as basement or cellar tanking should be carried out.

If tanking is not a system you wish to have installed then Prokil can install other waterproofing products such as cavity drain systems, “Type C” and integrated systems, “Type B”.

How Do I Know If I Need Basement or Cellar Tanking?

Simply put, if you want to use your basement or cellar, then it should have a waterproofing system. If you are unsure whether one is already in place, our team of tanking specialist surveyors at Prokil can carry out a survey to investigate. All the expert surveyors are qualified and are able to identify any basement or cellar tanking system already in place, how well it may be working and or whether your property may benefit from installing a new tanking system.

Alternatively, look out for these signs to show that your basement or cellar could benefit from tanking.

  • Silting around the edges of the basement or cellar which could indicate water ingress
  • Decorative spoiling at various heights on the walls throughout
  • The presence of sitting water
  • Damp timbers which may have started to rot and or decay
  • Timbers which have been infested with wood worm

What Is Involved With Basement and Cellar Tanking?

It is always advised that from the start a waterproofing specialist is involved. Whether this is for a new build or on an existing structure, having an expert tanking surveyor is vital.

Initially plans or the property itself are inspected and as much information about the building is gathered. From here your basement and cellar tanking expert will put a comprehensive report together to present to you detailing what basement or cellar tanking services would best suit your requirements.

Once given the go ahead, our team of dedicated tanking operatives will get to work to suitably prepare the site prior to the installation. This is the most vital part of the process, as if it is not done correctly, it can leave the basement or cellar vulnerable to having issues.

After the preparation, our tanking specialists will then install the chosen system as required and leave the site clean and tidy ready for any other works to be carried out.

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