Can a collapsed drain be repaired without digging up the garden?

In many cases, yes. Pipe relining is a no-dig repair technique that can fix cracked or partially collapsed drain sections without excavation. Full collapses may still require digging.

How do I know if my drain is collapsed or just blocked?

A CCTV drain survey is the only reliable way to tell. Symptoms can be similar — the key difference is that a collapsed drain will keep recurring even after clearing, and relining or excavation will be required.

Is a collapsed drain covered by home insurance?

Some home insurance policies cover drain collapse, particularly if it has caused subsidence or damage to the property. Check your policy documents and call your insurer. We can provide a CCTV survey report for insurance purposes.

Blocked Drain vs Collapsed Drain — What's the Difference?

The symptoms of a blocked drain and a collapsed drain can look very similar from the surface. But they have very different causes, and very different solutions. Here's how to tell them apart — and what you need to do about each.

What Is a Blocked Drain?

A blocked drain is a drain pipe that is structurally intact but has an obstruction preventing water from flowing freely. The blockage is usually caused by an accumulation of material — grease, fat, hair, wipes, roots, or physical objects — within the pipe.

Blocked drains are extremely common and, in most cases, straightforward to fix. A professional drain engineer uses high-pressure water jetting to blast through the blockage, leaving the pipe clean and clear.

Signs of a Blocked Drain

Slow draining water
Gurgling sounds from drains
Unpleasant smells
Sewage backing up in extreme cases
First occurrence or infrequent problem

What Is a Collapsed Drain?

A collapsed drain is a drain pipe that has physically failed — cracked, fractured, broken, or completely caved in. The pipe is no longer structurally sound and cannot perform its function regardless of whether it is cleared or not.

Collapsed drains are more common in Derby's older residential streets, where Victorian-era clay pipes are still in use. These pipes are vulnerable to ground movement, root intrusion, heavy vehicle loading, and simply the passage of time. Modern PVC pipes are much more resistant to collapse, but can still fail under extreme conditions.

Signs of a Collapsed Drain

Recurring blockages that keep coming back even after clearing
Persistent sewage smells that don't go away
Subsidence — ground settling or sinking near drain routes
Damp patches appearing in walls, floors, or ceilings near drain runs
Cracks in walls or foundations near the building perimeter
Sinkholes or soft spots in gardens or driveways

How to Tell the Difference

The honest answer is: you often can't, without a CCTV drain survey. Both can present with similar symptoms. The key indicator is persistence — if a drain keeps blocking within days or weeks of being cleared, this strongly suggests a structural problem rather than a simple blockage.

A CCTV drain survey sends a camera through the pipe and shows us exactly what is happening inside. This takes the guesswork out and means any repair work is precisely targeted at the actual problem.

What Happens If You Ignore a Collapsed Drain?

A collapsed drain will not fix itself. Over time:

Leaking sewage will undermine the surrounding soil
This can cause subsidence, affecting your property foundations
The collapse will spread along the pipe run
The repair cost increases significantly the longer it is left
Vermin may enter the property through the damaged pipe

Repair Options

For blocked drains: high-pressure water jetting clears the blockage and restores normal flow. Quick, affordable, no mess.

For collapsed drains: the two main repair options are pipe relining (no-dig) or excavation and replacement. Pipe relining involves inserting a resin liner into the damaged section that cures to form a new pipe — no digging required in most cases. Excavation is needed where the pipe has completely collapsed or is too damaged for relining.