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If you have a commercial, industrial, infrastructure or heritage structural repair enquiry, contact us now. We will respond within one working day. Please note we do not provide services for domestic properties.
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Even a small leak can become a costly problem if ignored. Water ingress doesn’t just look unsightly — it weakens structures, encourages damp and shortens service life.
At Structural Repairs, we offer leak seal services in Cardiff, providing fast, effective repairs that restore your structure to “new or better” condition. With over 35 years of proven experience and certified expertise, we deliver solutions that are watertight, durable and compliant.
Leak sealing is the process of applying specialist sealants into voids or defective areas to stop seepage at their source.
This targeted method uses injection resins such as polyurethane or epoxy to seal structures from within.
The result? A strong, sealed structure that resists water penetration for years to come.
For more information visit https://www.ciria.org –
Ciria’s website provides respected guidance on concrete durability, waterproofing considerations, and structural remediation


Our leak seal solutions resolve a wide range of issues, including:
Each leak poses a unique risk — whether environmental. Our engineers assess root causes and create a tailored sealing plan.
Unaddressed leaks lead to escalating damage and risk:
Timely leak sealing avoids these dangers — protecting your building and its occupants.

Structural Repairs follows a comprehensive method to ensure reliable performance:
Our leak seal work leaves structures stronger, safer and drier than before.
Choosing the right contractor matters — here’s why clients across the UK choose us for leak seal services in Cardiff:
We don’t just seal leaks — we solve root causes and ensure your structure performs better than ever.
Leak sealing often takes place in sensitive environments. We ensure:
Every project is managed with responsibility and respect for people and the environment.
Well, it depends on the structure itself. But in most cases, yes – our range of injection systems can handle active, dormant or pressurised leaks.
Yes. Properly designed and applied, it provides a flexible, waterproof barrier lasting decades.
No. Injection sealing is internal — minimal surface access is required.
Almost never. Ports are removed and finishes restored to blend seamlessly.
Yes — most projects are completed with no operational downtime.
If you’re experiencing leaks, damp or water ingress in Cardiff, Glamorgan, contact Structural Repairs today.
Our experts will identify the problem, design a tailored injection solution, and restore your property’s waterproof integrity.
0300 030 1822
[email protected]
46 The Arches, Alma Road, Windsor SL4 1QZ
structuralrepairs.com
Free initial consultation and site survey available.
Structural Repairs — delivering watertight results across Glamorgan.