The full turnkey structural waterproofing specialist

What we do:

Here at SWS we take on and manage the whole structural waterproofing envelope for our various clients, whether they be:

  • Architects
  • Engineers
  • Civil Engineering companies
  • House builders
  • Contactors & Sub-contractors
  • Other infrastructure specialist construction businesses
  • Utility companies
  • Industrial plants

We provide a complete consultancy, advice, design, detailing and installation service and all our work is carried out & completed to BS8102 by expert and fully trained – on materials – technicians


  • Type A. Tanked/Membrane Protection
  • Type B. Structurally Integral Protection
  • Type C. Drained Protection


  • Grade 1     Seepage and damp patch tolerable solutions
  • Grade 2     Non seepage and vapour tolerable solutions
  • Grade 3     Complete dry environment structures such as habitable basements


  • Site inspection services
  • Remedial and new structure combination system design and solutions
  • Bespoke basement solutions for passive or challenging terrains and ground types
  • Multi deck basement solution for prestige domestic properties
  • Chemical and pollution containment and barrier systems
  • Advice and installation and the successful homogenous connecting of:
    • membranes
    • Water-stops and injection systems
    • Cementitious coatings
    • Drainage systems
  • Extreme environment solutions
  • Radon and other gas barrier systems
  • Latest concrete repair systems
  • Basement ventilation advice

Expertise you can count on

Our surveyors, Engineers and installation technicians have worked in a variety of situations and challenging environments, and site types over many years. Whether we are sealing a new simple one floor basement in London or working on a critical piece of infrastructure; the same care and attention to detail goes into every project.


  • Our CSSW (Certificated Structural Waterproofing Surveyor) will work with your design team and engineers at the inception of the project advising on fit for purpose solutions and the required detailing
  • Our surveyor will oversee our involvement and advise on timings and fitting windows to ensure that other trades can get on with their work without damaging what we install
  • Our trained on product installation technicians will make sure that everything we have recommended is installed to the highest industry standards

Areas of specialisation and experience in sealing

  • Simple and complex multi floored basements in city and rural locations
  • Infrastructure projects for the energy and transport sectors
  • Industrial sites requiring water and chemical containment
  • Utilities: Water, Gas and Electricity
  • Highways and tunnelling

We always design and install to BS8102

All our work is carried out to the exacting standards that BS 8102 requires. The standard is there so that you can be sure that all work we carry out is fully compliant with current best practice and regulations.

And all our work is guaranteed

This also means we can provide project specific insurance to cover for failure and remedial work if required. In addition to this andIf required for structures that contain valuable plant, artefacts or business or operationally critical assets;we can also provide consequential loss cover should a building or structure become either unusable or uninhabitable as a result of water or chemical ingress due to installation or system failure.


Technologies for a changing environment and designing for the future

We work with industry leading manufactures to ensure that whatever we or you specify is best in class and will cope with the demands made on it. Many products we use are unique to us and are approved by organisations such as German Railways for up to an 80-yearlife and beyond.

We use:

  • Technologies such as membranes and water-stops that will cope with the current environment and can adapt if the climate or local environment changes
  • Technologies that will adapt and evolve with the structure
  • Technologies that can cope with rising or variable water tables
  • Sealing systems that are flexible and resistant to pollution

If you’d like to find out more about the complete SWS Ltd turnkey serviceand how we can fulfil the structural waterproofing needs of your next project – whatever the sizeand structure type– get in touch. Call us on: +44 (0) 845 170 0731

or email your details and initial area of interest: