The North’s PREMIER Basement Conversion & Waterproofing Specialists
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Basement and Cellar Waterproofing/Tanking for Refurbished Basements

If done properly, converting an existing damp basement will add not just additional, dry usable space but also significant value to properties

Whether you client is considering a basement kitchen, additional bedrooms or just dry storage, it is absolutely crucial that you get expert advice to ensure the finished conversion is not just beautifully finished but also robustly waterproofed and compliant with any current building control/planning regulations.

Pure’s CSSW (Certificated Surveyor in Structural Waterproofing) Qualified and experienced surveyor will provide you with expert advice throughout your project to ensure the basement waterproofing system is robust and effective and will protect your property against the risk of damage from water ingress (flooding) and dampness.

Pure Basement Systems offer a comprehensive basement waterproofing system design, installation and ongoing maintenance service.

It is crucial that basement waterproofing is considered at design stage to ensure that the specified basement waterproofing system can be correctly adopted into the overall build.

There are two types of generic waterproofing system as outlined in the current British Standard BS8012 – 2009 “Code of Practice for protection of below ground structures against water from the ground” which are suitable for refurbishment projects:-

  • Type A (barrier) protection – comprises of a barrier system which is applied to the structure externally, internally or within the structure with the goal of precluding water ingress/dampness.
  • Type C (drained protection) – comprises of an integral drainage system which manages water ingress/dampness and prevents it from affecting the usable space.

Type C waterproofing systems can often be more viable for refurbishment project given that they can be cleaner and quicker to install.

Basement Contractors for all types of properties and projects

Basement Waterproofing Contractors select from one of the above generic waterproofing systems dependent on the individual property’s risks when considering waterproofing design. The type of project, risk of water ingress/dampness and overall build-ability for the project should all be considered when selecting the appropriate waterproofing system(s).

Poorly implemented basement waterproofing is likely to result in unpredictable and extremely costly and distressing results, unfortunately, this is something we have witnessed when we have seen work not been carried out by experienced, suitably qualified professionals. We would always use purpose made high quality equipment and materials to supplement our expertise.

Internal dampness and water ingress (flooding) will occur as a result of a poorly designed, inadequate waterproofing system. This will result in significant damage to your client’s property and their possessions which will be extremely costly and disruptive to remediate, it can also be pretty embarrassing and costly to your reputation too.

Pure Basement Systems trained and experienced surveyors and installation technicians will help you to remove the risk of water ingress (flooding) and dampness in your basement conversion through:

  • A thorough professional survey of your property and assessment of the risks presenting
  • Accurate, evidence based waterproofing system design and material specification
  • Professional technical installation of the waterproofing system specified
  • Planned post-installation maintenance program

What problems will a specialist solve?

It’s important that you recruit a specialist basement waterproofing company at an early stage in the project. Reputable Basement Waterproofing Contractors employ CSSW specialist surveyors who can help design and implement your waterproofing solution. Experienced CSSW surveyors can help you to specify the correct system for the project and discuss with you how it can be adopted into the overall build.

Speak to a Specialist at Feasibility Stage.

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.