Trusted by leading organisations across housing, commercial & public sectors.
Commercial Leak Detection Specialists
We provide specialist leak detection services for commercial buildings, helping organisations identify the true source of water ingress quickly and accurately.
In complex buildings, leaks are rarely straightforward. Without proper investigation, issues can be misdiagnosed — leading to repeated failures, disruption and unnecessary cost.

The Challenges You’re Facing
We are typically called in when:

The source of a leak is unknown or disputed
Previous investigations have failed
Water ingress is affecting multiple areas or units
There is pressure to resolve issues quickly in operational environments
Insurance or compliance requires accurate reporting
A Specialist Approach to Leak Detection
As moisture and mould specialists, we don’t just locate leaks — we understand how moisture behaves within a building.
Our approach focuses on:
Identifying where water is entering
Understanding how it is spreading
Differentiating between possible causes
Providing clear, evidence-based conclusions
Our Leak Detection Methods
We use a combination of advanced techniques, including:

Thermal imaging
Acoustic detection
Pressure testing
Moisture mapping
Building fabric assessment
Designed for Commercial Environments
We support:

Facilities and estate management teams
Commercial property owners
Multi-site portfolios
Retail, office and operational buildings
Our work is delivered with a focus on speed, accuracy and minimal disruption.
Link to Core Services
Leak detection often leads into wider investigation or remediation. We also support with:
- Water Restoration following leaks
- Damp & Mould Surveys where issues persist
- Air Quality Testing if mould is present

Suitable for compliance, legal and insurance use.
JAG operates within recognised quality, technical and procurement frameworks. Our reports are written to evidential standard and routinely relied upon by housing providers, insurers and legal teams.
Independent — no remediation contracting conflict
Authored by experienced specialists
Defensible methodology and chain of evidence
Covering key cities across England & Wales — with portfolio coverage nationwide on instruction.
Portsmouth
Southhampton
Oxford
Birmingham
Bristol
Brighton
Winchester
London & the Home Counties
Cardiff
Swindon


