Leak Detection Specialists Based in Edenbridge, Kent

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Working Across the UK Since 1986

Thornton Consulting are specialists in building leak investigations and electronic leak detection of waterproofing membranes with 40 years of experience in the industry. We cover the whole of the UK, including London, Manchester, and Birmingham and across Kent, including Folkestone, Sevenoaks, Ashford, Tunbridge Wells, Canterbury and Maidstone.

      EXCELLENT  
   Based on 6 reviews 
    
 
 
 
   
 
 
       Posted on Google  
   
   Matthew Hall 
 
 
 
 Trustindex verifies that the original source of the review is Google. Thank you so much, Thornton Consulting helped us find several leaks in our London based data centre, we had used two previous companies try and had no luck until Thornton stepped in!
  
 
      Posted on Google  
   
   Alex Hollis 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent service from the Thornton Consulting team. Professional, responsive and clearly experts in what they do. They kept us informed throughout and made the whole process straightforward. Highly recommended.
  
 
      Posted on Google  
   
   Eden Sports Clinic 
 
 
 
 Trustindex verifies that the original source of the review is Google. Really impressed with the service provided. My business is based in a 13th Century building and has been struggling with leaks and damp for years that no one else has been able to fix. They identified where the water was coming in from and how to resolve the issues straight away. Very professional, efficient and friendly.
  
 
      Posted on Google  
   
   Edward Chapman 
 
 
 
 Trustindex verifies that the original source of the review is Google. Very pleased with the work of Wendy and the team, they identified quickly and inexpensively the source of several leaks which have challenged us for years.
  
 
      Posted on Google  
   
   Tom Spavold 
 
 
 
 Trustindex verifies that the original source of the review is Google. They consistently do a really good job and are extremely reliable. They carry out a wide range of tasks across both commercial and residential properties, always working to a high standard. Their paperwork and reporting are very comprehensive, which makes follow-up and compliance straightforward. I would highly recommend them.
  
 
      Posted on Google  
   
   Paula Foxleys 
 
 
 
 Trustindex verifies that the original source of the review is Google. We have used Thorntons for many years and they always provide  an excellent service followed by a their reports with a full scope of their works and any recommendations for sites. We highly recommend this company.
  
 
  
  
 
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Our Services

Learn more about our range of expert building services.

Latest Blog & Case Studies

To find out more about what we do and how we work, read our case studies and blogs below.

29 July, 2026

Electronic Leak Detection of a Supermarket Roof, Surrey

Project Overview Thornton Consulting was instructed to carry out an electronic leak detection survey to assess the current performance of an aged PVC waterproofing system …

Grey single-ply membrane on a large flat commercial roof in Surrey.

11 June, 2026

Electronic Integrity Testing of Hot Melt Waterproofing, East London

4 June, 2026

Roof Car Park Leak Investigation, West London

4 May, 2026

What is Waterproofing Integrity Testing?

About Us

Thornton Consulting specialises in locating and analysing leaks in buildings and other waterproof structures, whether they originate in the roof or other elements of the building envelope, as well as leaks or dampness in service floors and basements. We offer a whole range of detection and testing techniques that can be used across both commercial and large residential buildings across the UK.

Thornton Consulting was established in 1986 and encompasses the brand Leaktector, which pioneered the electronic testing for leaks in flat roof waterproofing membranes.

The management team have over 60 years experience between them and are specialists in their area. We have a highly qualified team of consultants and engineers that cover the UK.

Meet the Team

Trusted by Our Clients

We deliver major commercial and residential projects across the UK and are proud to have worked on many prestigious contracts. Some of our clients include:

How We Test

Our primary testing method is through Electronic Leak Detection, of which there are two methods:

LOW VOLTAGE TESTING: The wet test method, also known as earth leak detection and low voltage testing.
PINHOLE TESTING: The dry test method- this test is non-destructive and highly accurate, being able to detect pinholes in the membrane barely visible to the naked eye.

These tests do rely on the electrically conductive properties of the deck and insulating properties of the waterproofing to be effective so we also offer our differential pressure test when necessary such as for non-conductive decks.

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Client Testimonials

I’ve worked with Thornton’s team for nigh on 10 years and I’m yet to be disappointed by any aspect of their business or interaction with any of their staff. I feel that the collaborative approach we have when working together not only benefits our site in a speedy response and solution, but it also strengthens our relationship with our onsite client team, building in faith that together we can self-solve most, if not all issues. Working with Wendy and the onsite teams is nothing short of a pleasure. I would highly recommend using Thornton Consulting Group for all investigative services when it comes to finding leak issues.

OCS Group (Bluewater)

Your team have successfully found the cause of the water ingress. I also wanted to write to express how impressed we are with the professionalism of both Sam and Dave and there health and safety whilst on site. I will be recommending Thornton Consulting going forward to the Hospital and will certainly use this service in the future with Carillion. Many thanks, and also for attending at such short notice.

Carillion Plc

We have worked with Thornton’s for several years now and we could not be happier with the service. The team are really helpful, accommodating and always happy to help us out if we are under pressure from a client. The team are always happy to take a call to discuss a project with them to get a clear understanding of the issues found on site. Thorntons always find the issues and provide a very thorough report to outline them with recommendations on repairs required.

Foxleys Fabrick & Building Maintenance

Thank you for your assistance with the DLI. The contractors used were fantastic and I would definitely recommend using them in the future.

Smart Property Development

Thornton Consulting are extremely professional, reliable and carry out a fantastic service with excellent communication throughout – we would recommend using them and we certainly will be using them again.

Rendall & Rittner

Just wanted to take a moment to commend your team for the works carried out on site. We are really pleased with the results.

TS, M

Thanks for the work carried out and the subsequent report. Sam and Dave were 1st class.

Complete Building Services Ltd

Get in Touch Today

Call us on 01342 410508, email us at mail@thorntonconsulting.co.uk or send us a message using the form below. A friendly member of our team will be in touch shortly.

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