Services
Top-Hat & Lateral Joint Sealing
Top hat lateral junction sealing for watertight connections, no excavation.
Need to Seal a Leaking Sewer Junction?
In the UK’s ageing sewer network, the connection between a lateral pipe and the main sewer is the number one failure point. Trenchix provides a permanent, trenchless solution: Top-Hat Lateral Joint Sealing.
We utilise advanced robotic technology to install a “Top-Hat” profile a resin-impregnated liner that seals both the main line interface (the brim) and extends up into the lateral pipe (the crown). This creates a seamless, watertight, and root-proof sewer junction repair without the need for disruptive open-cut excavation.
Why Use Top-Hat & Lateral Sealing?
Stop Infiltration & Exfiltration (I&I): Displaced joints allow groundwater to flood the sewer (increasing treatment costs) and sewage to leak out (polluting soil). Our lateral drain repair seals the junction completely, guaranteed for 50 years.
Prevent Root Intrusion: Roots seek out the weakest point: the join. By creating a physical GRP barrier, we stop roots from re-entering, preventing future blockages.
What you get
- Pre-works condition survey
- Structural repair design
- Post-works CCTV verification
- Warranty-backed installation
- Full QA documentation pack
Why Trenchix
Delivered with certainty
No-dig first
Trenchless techniques restore assets without excavation — less disruption, lower cost, faster handover.
Approved materials
WIS-approved liners and repair systems installed by trained, certified crews.
Verified by CCTV
Every repair is proven with post-works CCTV so you have evidence of completion.
How it works
From enquiry to evidence
Diagnose
CCTV survey confirms the defect, its cause and the right repair technique — lining, patch, robotic cutting or excavation.
Design the repair
We specify WIS-approved materials and methodology, with drawings and RAMS for your approval before mobilisation.
Install
Certified crews complete the repair — typically trenchless, with minimal disruption to the surface and your operations.
Prove it
Post-works CCTV proves the repair, and the completion pack includes warranty documentation for your records.
Who it’s for
Built for commercial decision-makers
Asset managers
Trenchless renewal that restores structural integrity without dig-and-replace disruption.
Main Contractors
Warranty-backed repairs proven with post-works CCTV.
Commercial landlords
Localised patch and lining solutions that protect tenants and budgets.
Why contractors trust Trenchix
FAQs
Frequently asked questions
How long do trenchless repairs last?
UV-cured CIPP liners and mechanical patch systems are designed for a 50+ year service life and are installed using WIS-approved materials by certified crews.
Is excavation ever needed?
Most structural defects can be repaired no-dig. Where excavation is unavoidable we self-deliver the civils too, so there is a single point of responsibility.
Do repairs come with a warranty?
Yes — installations are warranty-backed and every repair is proven with post-works CCTV so you have evidence of completion for your records.
How quickly can a repair be mobilised?
Patch repairs can often be delivered within days of survey. Lining programmes are scheduled around your programme, with emergency mobilisation available 24/7.
What pipe diameters can you line?
UV CIPP and patch systems cover a wide diameter range from small laterals through to larger diameter sewers — we specify the method after survey.
Will the repair stop infiltration?
Structural liners and joint sealing systems are designed to restore watertightness. Post-works CCTV confirms the result before we close the job.
Related services
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Ready to discuss your project?
From major infrastructure surveys to emergency commercial drainage callouts — our teams are available 24/7.