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Basement Tanking & Cellar Tanking by Specialist Contractors

Basement Waterproofing is the correct term for installing a system to prevent water ingress (flooding) or dampness to a below ground area such as a basement or cellar.

Cellar Tanking and Basement Tanking are also terms which have been adopted over many years to identify with fitting a barrier to below ground walls in an attempt to prevent water ingress/dampness. Over recent years the term Cellar Tanking has been replaced with Waterproofing Barrier System, Structural Waterproofing System or Waterproofing System…

Water ingress (flooding) and dampness in below ground areas such as basements and cellars are common occurrences. Property in the UK is traditionally built into damp or wet earth and subsequently without effective basement waterproofing systems the usable space will become affected by at best dampness or at worst flood water ingress.

At the point you decide you would like to convert your damp basement into valuable additional space, contact Pure Basement Systems to ensure you receive expert advice from one of our CSSW qualified, experienced surveyors who will identify any dampness/water ingress risks and a design and specify a suitable, robust waterproofing system(s) for your project,

Michael, our surveyor will liaise with you and your architect at design stage to agree how the basement waterproofing system can be adopted into the build and importantly also facilitate future maintenance requirements.

The waterproofing process for Basement and Cellars

The typical stages of the process are outlined below:-

  • Strip Out
  • Create adequate head height (dig out)
  • Create and access/egress points required (windows/doors)
  • Dig sump holes to house sump pumps
  • Create drainage channels
  • Install pumps
  • Install drainage channels
  • Install concrete floor
  • Install Cavity drainage wall and floor membrane
  • Install wooden floor over floor membrane and insulation
  • Build wall frame to provide cavity for insulation
  • Carry out first fix plumbing and electrics
  • Install plaster boards to walls (and ceilings)
  • Install second fix plumbing and electrics
  • Install joinery items (doors/skirting boards etc)


Guaranteed Quality

Guaranteed Quality


Our Process

Our Process


  • I would definitely recommend pure basement systems. Michael is so helpful and unlike other companies taylors the work around your needs.

    Mr H, Leeds

  • A superb conversion, using skilled trades people. Fantastic warm dry family living space, exactly what we asked for.

    Mr S, Harrogate

  • The basement conversion is superb, I don’t have any negative comments about Pure – I would be happy to recommend.

    Mrs B, Leeds

  • We struggled to find someone we could trust to do the cellar bathroom for us. Pure said they offered a no fuss, reliable service and they do – a quality finish too.

    Mrs D, Leeds

  • We wanted our cellar to become a clean dry store room, and pure basements did a fantastic job of this converting the cellar from a very wet and cold space.

    Miss H, Huddersfield

  • Pure Basement Systems are reliable, professional and offer good quality sound advice. It was important that we obtained good advice….

    Mr F, London

  • We have used Pure Basement Systems twice now for basement conversions in York. Their service is superb, they are reliable, their installers are professional

    C Construction, York

  • Just a quick note to thank you for the fantastic job your team have done on our cellar conversion………..we will be working together again soon and I have already recommended you.

    Mr & Mrs C, Leeds

  • Pure were reliable and always arrived on site promptly wearing the appropriate PPE. The installation was quick and straight forward.

    Project Manager, Scalby

  • Pure Basement Systems were very good to work with. They are clearly experienced in Basement Waterproofing.

    Damrak, Amsterdam



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Why choose a specialist?

Why choose a specialist?

When your reputation matters, you need a specialist CSSW Surveyor.

Waterproofing and Tanking

Waterproofing and Tanking

Pure can work with you every step of the way, from planning through to install.

Health and Safety

Health and Safety

Ensuring we work to code of conduct. No accidents in 5 years.

Damrak Retail Amsterdam

Damrak Retail Amsterdam

See how we helped this client achieve a dry, usable retail storage space.

Commercial Surveys

Commercial Surveys

Minimise risk and consult us at feasibility stage. We can plan & design.

Meet the Team

Meet the Team

Find out who will be consulting, managing and rolling out your conversion.