Recently, Protectahome was engaged to consult on a recurring water ingress issue and suspected failed waterproofing system in several lower ground floor (LGF) units of a converted building in South London.

Collaborating closely with the property managers and chartered surveyors—who had already carried out partial strip-out works in the basement—we undertook an in-depth investigation. Our findings revealed significant failures in both the design and installation of the waterproofing system, alongside multiple instances of poor building practices. We have since advanced to more invasive investigative techniques to assess the full extent of the waterproofing issues and begin formulating a comprehensive remediation plan.

Regrettably, due to the severity of the design and installation errors, it has become clear that a complete strip-out and re-fit will be necessary—an outcome that, while unfortunate, is often the worst-case scenario in such cases.

During our destructive investigation, we identified several critical issues, including unmaintainable drainage, absence of proper drainage channels, and inadequate sealing around service penetrations. These were just a few of the findings in a much larger list, detailed in our exhaustive summary report.

Should we be further instructed on this project, Protectahome will assume full responsibility for the waterproofing process, offering £5 million of design professional indemnity (PI) insurance and a 10-year installation guarantee, covering both materials and workmanship. We also provide insurance-backed guarantees for added peace of mind, ensuring complete security for both our clients and end-users.

With an established reputation in the investigation and remediation of failed basement waterproofing systems, Protectahome stands as a trusted expert. Whether addressing an insurance or warranty claim, or dealing with private remediation matters, we bring a forensic, tailored approach to each project. This often leads to a more cost-effective solution, minimizing overall remedial costs.

For professional consultation or investigations into basement waterproofing issues, contact our Commercial Director, Gareth at gareth@protectahome.co.uk for an initial discussion.