Specialists in Basement Waterproofing,
Rising Damp, and Timber Infestation

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Who We Are

 We are leading specialists in structural waterproofing and building preservation for both residential and commercial properties in London and across the Home counties.

Our experienced team of certified surveyors, project managers and technicians are specialists in Basement Waterproofing, Timber Infestation and Rising Damp.

Our Specialist Services


Full guarantee backed systems for both internal and external waterproofing for below ground structures and elevated decks.

Timber Infestation

A range of treatments to rectify and prevent dry and wet rot decay to structural timber and joinery.

Rising Damp

A range of render and membrane systems as well as damp proof courses to rectify and prevent damp penetration.

Area We Cover

Our Head Office is situated in Greater London. Our main field of operation covers London and the surrounding Home counties. You can see a map of the area we cover here:

Why Choose Renlon

Certified Surveyors

Our surveys and inspections are carried out by highly experienced and professional surveyors. All surveyors are fully Certified in Structural Waterproofing (CSSW) and Remedial Treatments (CSRT). The main industry body, The Property Care Association (PCA) awards these qualifications.

Experience and Longevity

We have both experience and longevity, having provided building preservation and structural waterproofing solutions for over 40 years. We design and install all of our own remedial solutions.

Service Quality

We are members of the relevant trade and professional associations, and all aspects of our work are carried out to the ISO 9001:2015 Standard of Quality. A copy of the company’s quality policy is available on request.

Environmental Sustainability

Sustainability and protection of the environment are very important to us. All of the materials we use are non-toxic or have very low toxicity.

Insurance Backed Guarantees

As a long established and certified provider, we are able to offer long-term guarantees for our structural waterproofing systems, remedial damp solutions and timber treatments. We also offer the option of independent insurance backed guarantees.

Approved Contractor Status

We hold approved contractor status with a number of the leading manufacturers of specialist materials used within our industry.

Case Studies

15th January 2019

Basement Tanking – Bishopsgate

15th November 2018

Basement Waterproofing – Clerkenwell

5th October 2018

Basement Waterproofing – Richmond


Request a Survey or Request a Tender

Request a Survey

If you would like to request a survey of your property, or your client’s property, please fill in this short form.

Request a Tender

If you would like to request that we tender for a prospective project or development, please fill in this short form.