Drain Relining vs Excavation: Which Is Right for Your Property?

When a CCTV survey reveals a cracked, displaced or damaged drain, the next question is always the same: how do we fix it? In most cases, you've got two main options — no-dig relining or traditional excavation. Both have their place, and the right choice depends on the type of damage, the pipe's location, and your budget.

Here's a straight comparison from engineers who do both, every week.

What Is Drain Relining?

Drain relining (also called CIPP — Cured In Place Pipe) involves inserting a flexible liner impregnated with resin into the damaged pipe. The liner is inflated against the pipe walls and cured using UV light or ambient heat. Once set, it forms a smooth, jointless new pipe inside the old one.

No digging. No disruption to your garden, driveway or patio. The work is done entirely through existing access points like manholes and inspection chambers.

Pros of relining

• No excavation — your garden, driveway and landscaping stay intact. This is a huge advantage for properties in places like Harrogate, York and Chapel Allerton where driveways and gardens represent serious investment.
• Faster — most domestic relines are completed in a single day.
• Often cheaper — no reinstatement costs for digging up and replacing surfaces.
• Excellent longevity — a properly installed reline lasts 50+ years.
• Root-proof — the seamless liner eliminates joints, which are the main entry point for tree roots.
• Improved flow — the smooth internal surface actually improves water flow compared to the original pipe.

Cons of relining

• Slight bore reduction — the liner sits inside the old pipe, so the internal diameter is slightly smaller. For standard domestic pipes this is rarely an issue, but it can matter on undersized or heavily scaled pipes.
• Not suitable for all damage types — if the pipe has completely collapsed, there's no pipe left to line. Severe deformation or large holes may also rule out relining.
• Access requirements — we need sufficient access points to feed the liner in and inflate it properly.

What Is Excavation?

Traditional excavation means digging down to the damaged section of pipe, removing it, and replacing it with new pipe. It's the older method and sometimes the only option.

Pros of excavation

• Works for any damage — no matter how severe the collapse, displacement or damage, excavation can fix it.
• Full pipe replacement — you get brand new pipe with full bore diameter.
• Opportunity to upgrade — you can increase pipe size, change material, or reroute the drain if needed.
• Can address surrounding issues — we can deal with bedding problems, tree roots, and soil conditions while we're down there.

Cons of excavation

• Disruption — digging up driveways, patios, gardens or floors is messy, noisy and takes longer to complete.
• Reinstatement costs — you'll need to pay to repair whatever surface was dug up. Block paving, tarmac, concrete, turf — it all adds to the bill.
• Longer timeline — excavation, pipe replacement and reinstatement typically takes 2-5 days depending on depth and complexity.
• Higher cost — the combined cost of digging, replacing, backfilling and reinstating is usually significantly more than relining.

When Is Relining the Right Choice?

Relining is usually the best option when:

• The pipe has cracks, fractures or displaced joints but hasn't fully collapsed
• Tree roots have entered through joints but the pipe structure is still intact
• The pipe runs under a driveway, patio, building or other structure that would be expensive to dig up
• You want minimal disruption and a quick turnaround
• The pipe is reasonably straight and has adequate access points

When Is Excavation Necessary?

Excavation is the right approach when:

• The pipe has completely collapsed — there's nothing left to line
• The pipe is severely deformed, bellied or has lost its shape
• You need to increase the pipe diameter
• The pipe needs rerouting (common during building extensions)
• The depth is shallow and access is easy, making excavation straightforward

How We Help You Decide

We never recommend a repair method without first understanding the full picture. Every drain repair job starts with a thorough CCTV survey so we can see exactly what's damaged, where, and how badly. Then we'll lay out your options honestly — pros, cons, costs and timescales — and let you make an informed decision.

We carry equipment for both relining and excavation, so we're not biased towards either method. We'll recommend whatever genuinely solves your problem most effectively and cost-efficiently.

Real Examples

Want to see these methods in action? Take a look at our case studies:

• No-dig pipe relining — a partially collapsed pipe repaired with structural relining, no excavation needed.
• Robotic cutting and patch lining — collapsed drains repaired using robotic cutting and localised patch liners where digging wasn't an option.

Need a drain repair? Call 0333 577 4242 for an honest assessment. We'll survey the damage and give you a clear quote before any work begins.