The Power of CIPP Lining For Pipe Repairs

Updated: 4 September 2026

CIPP Drain Lining Explained: No-Dig Pipe Repair Without Excavation

Cured-In-Place Pipe lining, commonly known as CIPP lining, is a trenchless pipe rehabilitation method used to repair damaged drainage and sewer pipes from inside the existing pipe.

Instead of excavating and replacing an entire pipe run, a resin-impregnated liner is installed inside the existing pipe and cured to form a strong new internal lining.

This approach can significantly reduce excavation, disruption and reinstatement work where the existing drainage system is suitable for lining.

AJS Environmental uses survey-led trenchless drainage techniques, including UV drain lining, to repair damaged underground pipework across Essex, London, Kent, Hertfordshire and surrounding areas.

What Does CIPP Mean?

CIPP stands for Cured-In-Place Pipe.

The name describes the basic principle of the repair: a flexible liner is positioned inside the existing drainage pipe and then cured in place until it becomes a rigid internal lining.

The original pipe remains in the ground and effectively acts as the host pipe for the new liner.

This is why CIPP is often described as creating a “pipe within a pipe”.

How Does CIPP Drain Lining Work?

The exact installation method depends on the type of liner and curing system being used, but the process normally follows a controlled sequence.

Why Is CCTV Inspection Important Before CIPP Lining?

A CCTV survey is one of the most important stages before a lining repair is planned.

The survey helps establish:

• The location of cracks and fractures
• Whether joints are displaced
• Whether roots are present
• Whether concrete or other obstructions are inside the pipe
• The condition of the host pipe
• Pipe diameter
• Pipe route
• Access points
• Connections entering the pipe
• Whether the pipe is suitable for lining

AJS Environmental provides CCTV drain surveys to diagnose the pipe condition before trenchless repair is selected.

What Problems Can CIPP Lining Repair?

CIPP lining can be used for a range of drainage defects where the existing pipe is suitable for rehabilitation.

These can include:

• Cracked drainage pipes
• Fractured pipes
• Leaking joints
• Minor joint displacement
• Water infiltration
• Age-related pipe deterioration
• Recurring root ingress after root removal
• Long sections containing multiple defects

The suitability of lining depends on the individual drainage system and the severity of the defects identified.

What Must Be Removed Before CIPP Lining?

Drain lining requires a clean and appropriately prepared host pipe.

Potential obstructions can include:

• Tree roots
• Concrete
• Hardened deposits
• Scale
• Intruding connections
• Debris
• Foreign objects

Some obstructions can be removed by cleaning or high-pressure jetting.

Harder intrusions may require specialist robotic cutting before the pipe can be lined.

AJS currently uses robotic preparation as part of its wider no-dig repair workflow where roots, concrete or other hard intrusions must be removed before lining. :contentReference[oaicite:1]{index=1}

What Are the Main Benefits of CIPP Drain Lining?

Reduced Excavation

The major advantage of CIPP is that long sections of pipe can often be repaired without excavating the entire drainage run.

This can be particularly useful where pipes run beneath:

• Roads
• Car parks
• Commercial buildings
• Landscaped areas
• Driveways
• Industrial sites
• Schools
• Retail premises

Reduced Site Disruption

Less excavation generally means less disruption to site operations, traffic, access and surrounding surfaces.

This is one reason trenchless repair is particularly valuable on commercial and infrastructure sites where downtime needs to be controlled.

Less Reinstatement Work

Traditional excavation may require roads, concrete, paving, landscaping or other surfaces to be opened and subsequently reinstated.

Where CIPP is appropriate, much of this additional work can potentially be avoided.

Continuous Internal Repair

CIPP can rehabilitate a continuous pipe section rather than repairing only one isolated defect.

This can be particularly useful where several defects exist along the same drainage run.

Improved Internal Surface

The cured liner creates a new internal surface through the repaired section.

This can improve the condition of ageing or damaged pipework while restoring the drainage route without complete replacement.

CIPP Lining vs Traditional Drain Excavation

Is CIPP Always Better Than Excavation?

No.

CIPP is an extremely useful repair method, but it is not suitable for every drainage defect.

Traditional excavation may still be necessary where:

• The pipe is completely collapsed
• The host pipe cannot support a lining installation
• The drainage has severely changed position
• Access is unsuitable
• The defect requires physical reconstruction
• There are major external structural problems

What Is UV CIPP Lining?

UV CIPP lining uses ultraviolet light to cure the installed liner inside the existing drainage pipe.

The liner is positioned inside the pipe and a specialist UV light train passes through the liner to initiate and control the curing process.

Once cured, the liner forms the new internal pipe structure.

AJS Environmental’s current UV drain lining service uses CCTV diagnosis, cleaning, preparation, liner installation, UV curing and post-lining verification as part of its trenchless repair workflow. :contentReference[oaicite:2]{index=2}

What Is the Difference Between CIPP and UV Drain Lining?

CIPP is the wider repair category. UV drain lining is one method of curing a CIPP liner.

CIPP liners can be designed to cure using different methods depending on the system being installed.

UV lining specifically uses ultraviolet light as the curing method.

How Long Does CIPP Drain Lining Last?

CIPP systems are intended as long-term drainage rehabilitation solutions when they are correctly specified and installed.

The actual service life depends on factors including:

• Liner specification
• Pipe diameter
• Host pipe condition
• Installation quality
• Operating environment
• Drainage use
• Structural loading
• Correct curing

The more important consideration is therefore whether the liner has been correctly selected, installed and verified for the particular drainage application.

Can CIPP Lining Stop Tree Roots?

CIPP lining can help rehabilitate defects through which roots have previously entered the drainage system.

However, existing roots must first be removed and the pipe properly prepared.

Simply lining over significant root growth would not provide the correct preparation for the repair.

Can CIPP Repair a Collapsed Drain?

Not every collapsed pipe can be lined.

If a pipe has completely collapsed or lost the structural form required to receive the liner, excavation or another repair method may be necessary.

A CCTV inspection helps establish the extent of the damage and whether trenchless rehabilitation remains possible.

Can CIPP Lining Be Used on Commercial Sites?

Yes.

Trenchless lining can be particularly valuable on commercial and public-sector sites where excavation could interrupt operations or create significant reinstatement work.

Typical locations can include:

• Industrial estates
• Retail parks
• Warehouses
• Schools
• Commercial premises
• Highways drainage
• Car parks
• Residential developments

AJS’s current drainage services specifically combine CCTV inspection, no-dig repair, UV lining and robotic cutting for commercial, public-sector and residential drainage work. :contentReference[oaicite:3]{index=3}

How Do You Know Whether CIPP Lining Is Suitable?

The decision should normally follow a survey-led assessment.

CIPP Drain Lining Across Essex, London, Kent & Hertfordshire

AJS Environmental provides trenchless drainage investigation and repair services across Essex, London, Kent, Hertfordshire and surrounding areas.

Our wider no-dig capability includes:

• CCTV drain surveys
• UV drain lining
• Patch lining
• Drain preparation
• Robotic cutting
• Drain cleaning
• Post-repair CCTV verification

This allows the repair method to be based on the actual condition of the drainage rather than choosing a solution before the pipe has been properly inspected.

Related CIPP & No-Dig Drain Repair Guides

• UV Drain Pipe Lining
• UV Drain Lining & No-Dig Pipe Repair
• CCTV Drain Surveys
• Drain Lining in Essex & London
• Robotic Cutting & Lining Preparation