Does drain relining affect water flow?

No — drain relining slightly reduces the internal pipe diameter by a few millimetres, but the smooth surface of the new lining actually improves flow compared to an old corroded or root-encrusted pipe. There is no practical impact on drainage capacity.

Repair without replacing

Drain excavation
& no-dig relining.

Q: What is drain relining and how does it work?

Drain relining (also called no-dig or CIPP lining) inserts a resin-impregnated felt tube into the existing damaged drain. The tube is inflated and the resin cures to form a new pipe within the old one — no digging required. It is suitable for cracks, fractures, root ingress and minor collapses where the pipe alignment is still intact.

Q: When is drain excavation necessary instead of relining?

Excavation is required when the pipe has fully collapsed and there is no continuous void to insert a lining, when there is severe misalignment between sections, or when the pipe has moved due to ground subsidence. A CCTV survey will confirm which method is appropriate.

Q: Do I need planning permission for drain repairs?

No. Drain repair and relining work on private drains within your property boundary does not require planning permission. If the drain is a shared sewer, you may need to notify your water company — your engineer will advise.

Cracked, collapsed or root-damaged drain? We match you with a vetted local engineer who can repair it — often without a single dig. Free callback, no obligation.

No-dig lining lasts 50+ years

Often cheaper than excavation

Free callback — no obligation

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Two repair methods

Relining vs excavation — which do you need?

Recommended where possible

No-Dig Drain Relining

CIPP (Cured-in-Place Pipe) lining

A resin-impregnated liner is fed into the damaged pipe through an existing access point. It is inflated and cured to form a smooth, seamless new pipe within the old one — no excavation required.

No digging — garden, driveway and landscaping preserved
50+ year design life for the new lining
Seals cracks, fractures and root entry points permanently
Typically completed in one day
Usually cheaper than excavation
Not suitable for fully collapsed or severely misaligned pipes

Where relining is not possible

Drain Excavation & Replacement

Traditional open-cut repair

Where the pipe has fully collapsed, is severely misaligned or has moved due to ground subsidence, excavation may be the only option. The damaged section is exposed, removed and replaced with new pipe.

Suitable for fully collapsed pipes and severe misalignment
Allows inspection and correction of pipe gradient
New pipe installed to modern standards
Disruption to garden, driveway or hard landscaping
Typically higher cost than relining
May take more than one day depending on depth

Warning signs

When do you need drain repair?

Recurring blockages

If your drain keeps blocking despite regular jetting, root ingress or a structural defect is likely preventing permanent clearance. A CCTV survey followed by relining or repair is the lasting solution.

Damp, subsidence or garden sinkholes

A leaking or collapsed drain saturates surrounding soil, causing damp in walls, ground movement and even sinkholes in lawns or driveways. These symptoms indicate the pipe has failed structurally and needs repair, not just clearing.

Pre-purchase drain survey findings

CCTV surveys before buying a property commonly identify cracked pipes, root ingress and partial collapses. Getting a relining quote before exchange gives you negotiating power — or a reason to walk away.

Slow drainage across multiple outlets

When multiple sinks, toilets or baths drain slowly at the same time, the problem is almost always in the main drain rather than individual branch pipes — often a structural defect that requires investigation and repair.

Tree root ingress

Tree and shrub roots enter drain pipes through hairline cracks and grow rapidly. High-pressure jetting removes the roots but not the entry point. Relining seals the crack permanently, stopping regrowth.

Old clay or pitch fibre pipes

Homes built before the 1970s often have clay or pitch fibre drains that have reached the end of their service life. Rather than waiting for a failure, proactive relining provides a 50-year solution without disruption.

Engineer feeding a drain lining into a residential pipe access point

How drain relining works

Modern no-dig drain relining — known as CIPP (Cured-In-Place Pipe) lining — uses a flexible felt tube saturated with structural resin. The engineer feeds it into the damaged pipe from an access point, inflates it against the pipe walls, and allows the resin to cure. The result is a new, smooth pipe within the old one.

CCTV survey confirms the defect and checks pipe alignment
High-pressure jetting clears roots and debris before lining
Resin-saturated liner inserted and inflated against pipe walls
Resin cures in 1–3 hours to form a solid new pipe
Post-lining CCTV confirms a smooth, sealed result
50+ year design life, guaranteed by the installer

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Simple process

How it works

Enter your postcode

We check whether we have a vetted drain repair or relining engineer available in your area.

Free quote on the call

The engineer calls you back within minutes to discuss the problem and provide a no-obligation quote.

Repair completed

CCTV survey confirms the issue, the engineer recommends relining or excavation, and the repair is carried out.

Common questions

Drain repair FAQs

Drain relining inserts a resin-impregnated felt tube into the damaged pipe. The tube is inflated and the resin cures to form a new pipe within the old one — no digging required. It is suitable for cracks, fractures, root ingress and minor collapses where the pipe alignment is still intact.

Drain relining typically costs between £500 and £3,000 depending on pipe diameter, length and access difficulty. It is almost always cheaper than excavation. Using Blocked Drain Quotes to find an engineer is completely free.

A professionally installed drain lining has a design life of 50 years or more. It creates a smooth, seamless new pipe surface that is resistant to root ingress and corrosion.

Excavation is required when the pipe has fully collapsed with no continuous void to insert a liner, when there is severe misalignment between sections, or when the pipe has moved due to ground subsidence. A CCTV survey will confirm which method is appropriate.

No. Relining slightly reduces the internal diameter by a few millimetres, but the smooth lining surface improves flow compared to an old corroded or root-encrusted pipe. There is no practical impact on drainage capacity.

No. Drain repair and relining on private drains within your property boundary does not require planning permission. If the drain is a shared sewer you may need to notify your water company — your engineer will advise.

Drain excavation& no-dig relining.