Leak Detection Maidstone | Building Leak Investigations

Established in 1986

Pioneers of electronic leak detection in the UK

Over 35,000 successful tests

Excellent Client Reviews

Professional Roof Assessment & Leak Detection Service

Thornton Consulting brings decades of specialist expertise to commercial and large residential properties throughout Maidstone, Kent. Our approach integrates advanced electronic detection methods with thorough investigative analysis, ensuring your building’s waterproofing systems maintain optimal performance and protect your investment from water ingress damage.

Serving property managers, facilities directors, and building owners across Maidstone’s diverse business sector, we address leak concerns proactively and professionally, offering tailored, strategic solutions for long-term asset protection. From the town centre’s retail and office developments to industrial estates and multi-storey residential complexes, our services include comprehensive building leak investigations, scheduled planned roof inspections, and thorough waterproof integrity testing, among others, helping you avoid costly emergency repairs through proactive maintenance.

How We Work

  • Planning

    We commence every investigation with careful preparation, examining your building's specifications, construction type, and waterproofing details. This groundwork enables us to deploy the most effective testing methodology whilst accommodating your operational schedule and minimising business disruption.

  • Testing

    Our technicians utilise electronic leak detection equipment specifically designed for commercial applications. Whether employing low voltage (“wet method”) testing, pinhole detection (“dry method”), or differential pressure techniques (where the substrate is non-conductive or the membrane is not suitable for traditional electronic testing), we systematically survey all waterproofed areas to achieve thorough coverage and reliable identification of defects.

  • Evidence

    All findings receive documentation to include, comprehensive photography, and detailed technical records. This rigorous evidence collection provides contractors with quantifiable measurements with precise mapping data, streamlining the repair tendering process and reducing unnecessary assessments or guesswork.

  • Recommendations

    We translate technical data into actionable guidance, categorising defects by urgency and potential impact. Our recommendations balance immediate repair needs with longer-term strategies, supporting effective budget planning and risk management for your property portfolio.

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

What You Receive

  • Report

    A comprehensive technical document detailing methodology, complete findings, photographic evidence, and expert analysis. Our reports serve both technical teams requiring detailed data and senior stakeholders needing to understand implications for decision-making.

  • Annotated Plans

    Scaled drawings with precise leak location data are precisely marked and cross-referenced. These detailed plans enable roofing contractors to prepare accurate quotations and execute targeted repairs efficiently with no ambiguity.

  • Priorities

    A structured assessment ranking defects from critical issues requiring immediate action to lower-risk concerns suitable for scheduled maintenance. This prioritisation framework supports sound risk management and strategic budget allocation.

  • Programme Guidance

    Forward-looking recommendations covering repair sequencing, realistic timescales, and appropriate inspection frequencies. We help you establish proactive maintenance plans that prevent emergency situations and deliver long-term value.

Coverage

Based in nearby Edenbridge, our specialist team provides comprehensive leak detection services throughout Maidstone and the surrounding Mid Kent region.

Maidstone: ME14, ME15, ME16, ME17, ME18, ME19, ME20
Surrounding Areas: ME1, ME2, ME3, ME4, ME5, ME6, ME7, ME8, ME9, ME10, ME12, ME13

Key Areas: Maidstone Town Centre, Allington, Bearsted, Detling, Loose, Barming, East Farleigh, Aylesford, Snodland, Kings Hill, Larkfield, West Malling, East Malling, Wateringbury, Yalding, Harrietsham

Latest Blog & Case Studies

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

What is Waterproofing Integrity Testing?

Integrity testing of newly installed waterproofing membranes has become common place for new build projects, in particular large commercial constructions or apartment blocks, although it …

FAQs

What causes most leaks in commercial flat roofs?

Commercial flat roof leaks typically result from a combination of factors. Common issues include membrane deterioration from UV exposure and weathering, failed seams or joints where waterproofing sections meet, damage around roof penetrations such as vents and outlets, and ponding water that accelerates material breakdown. Regular integrity testing identifies these vulnerabilities early, allowing targeted repairs before minor defects develop into major water ingress problems.

Do you need access inside the building during testing?

For most electronic leak detection surveys, we primarily work on the roof exterior and don’t require internal access during the testing phase itself. However, if water ingress is already occurring, we may need to inspect affected internal areas to understand the damage pattern and validate our findings. We always discuss access requirements during our planning consultation and work around your operational needs.

How often should commercial roofs be tested for leaks?

The optimal testing frequency depends on several factors including roof age, type of waterproofing system, building usage, and your risk tolerance. New installations should be tested immediately after completion, and for established roofs, we typically recommend integrity testing every three to five years as part of a proactive maintenance programme, with more frequent inspections for older systems. We will provide specific recommendations based on our assessment of your building.

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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