Most drain problems don’t start with a collapse.
They start small.
A tiny crack.
A slight shift underground.
Something you’d never notice — until the symptoms begin to show.
Slow drainage.
Recurring blockages.
Unpleasant smells.
And by that point, the damage has already been there for a while.
So what actually causes drain pipes to crack?
And more importantly… what’s the right way to fix them?
Why Cracked Drain Pipes Are More Common Than You Think
Drain pipes are built to last.
But they’re not indestructible.
Over time, pressure, movement, and external factors can weaken the structure — leading to cracks that gradually get worse.
And because your drainage system is mostly hidden, these issues often go unnoticed until they start causing problems.
The Most Common Causes of Cracked Drain Pipes
Understanding the cause is key to fixing the problem properly.
Because if the cause isn’t addressed, the issue will come back.
Ground Movement
One of the biggest causes of cracked pipes is movement in the ground.
This can happen naturally over time due to soil shifting, temperature changes, or nearby construction work.
Even slight movement can put pressure on pipes, causing them to crack or misalign.
Tree Root Intrusion
Tree roots are constantly searching for moisture.
If there’s even a small weakness in a pipe, roots can force their way in and expand.
As they grow, they put pressure on the pipe walls, eventually causing cracks or breaks.
Age and Wear
Like anything else, pipes degrade over time.
Older materials become more brittle and prone to cracking.
This is especially common in older properties with ageing drainage systems.
Heavy Loads Above the Pipe
Driveways, vehicles, or heavy structures above a drain can put pressure on the pipe below.
Over time, this can lead to cracks or structural damage.
Poor Installation
If a pipe wasn’t installed correctly to begin with, it’s far more likely to fail.
Improper alignment or weak joints can lead to cracks developing sooner than expected.
Signs Your Drain Pipes May Be Cracked
Cracked pipes don’t always show obvious signs straight away.
But there are clear indicators to watch for.
Recurring Blockages
If your drains keep blocking, it could be due to cracks catching debris inside the pipe.
Slow Drainage
Water taking longer to drain may indicate restricted flow caused by internal damage.
Bad Smells
Leaks or trapped waste inside cracked pipes can lead to unpleasant odours.
Damp or Wet Areas Outside
Leaking pipes can cause water to escape into the surrounding soil, creating damp patches or soft ground.
Increased Pest Activity
Cracks in pipes can create entry points for rodents.
If you’re noticing pest issues, your drainage system could be a factor.
Why Cracked Pipes Shouldn’t Be Ignored
It’s easy to put off dealing with drainage issues.
But cracks don’t stay the same.
They get worse.
Over time, they can lead to:
- Larger structural failures
- Leaks and water damage
- Soil erosion
- More expensive repairs
Acting early can save you a significant amount of time, stress, and money.
How Are Cracked Drain Pipes Fixed?
There are two main approaches.
Traditional Repair (Digging)
This involves excavating the area, removing the damaged section of pipe, and replacing it.
While effective, it can be disruptive, time-consuming, and costly — especially if surfaces need to be reinstated.
Modern Repair (Drain Relining)
This is where things have changed.
Drain relining allows pipes to be repaired internally without digging.
A liner is inserted into the pipe and hardened in place, sealing cracks and restoring the structure.
It’s faster, cleaner, and often more cost-effective.
When Is Drain Relining the Best Option?
Relining is ideal when the pipe is cracked but still structurally intact.
This includes:
- Small to moderate cracks
- Leaking joints
- Root-related damage
- Recurring blockages caused by internal defects
If the pipe still holds its shape, relining is often the most efficient solution.
When Might Replacement Be Needed?
If the pipe has completely collapsed or is severely damaged, excavation may be required.
But in many cases, this isn’t necessary.
That’s why a proper inspection is essential before deciding on the best approach.
Why a CCTV Drain Survey Is So Important
Before any repair is carried out, the exact problem needs to be identified.
A CCTV drain survey allows a specialist to see inside your pipes and assess:
- The location of the cracks
- The severity of the damage
- The most suitable repair method
Without this, you’re guessing — and that can lead to the wrong solution.
Choosing the Right Drainage Company
Fixing cracked pipes properly requires experience and attention to detail.
At RR First Drainage Care & Repair, every job starts with a thorough inspection to ensure the right solution is recommended.
They have over 1000 genuine 5-star reviews across Google and Checkatrade, making them one of the most trusted and reviewed drainage companies in the area.
Their experience allows them to deliver solutions that can’t be beaten on price, while still maintaining high standards.
They also offer zero callout charges 24/7, so you can get expert advice without any upfront cost.
And as a fully insured company, you can be confident the work is carried out safely and professionally.
Final Thoughts
Cracked drain pipes are a common issue — but they don’t have to become a major problem.
With the right approach, they can be fixed quickly and effectively.
And in many cases, without any digging at all.
The key is identifying the cause early and choosing the right solution.
Need Help with Cracked Drain Pipes?
If you’re experiencing any of the signs mentioned above, the best step is to get a professional inspection.
RR First Drainage Care & Repair are available 24/7 with zero callout charges, so you can get expert advice without any pressure.
Frequently Asked Questions
What causes drain pipes to crack?
Common causes include ground movement, tree roots, ageing materials, heavy loads, and poor installation.
Can cracked drain pipes be repaired without digging?
Yes, in many cases drain relining can fix cracks internally without excavation.
How serious is a cracked drain pipe?
If left untreated, it can lead to leaks, structural damage, and more expensive repairs.
How do I know if my drain pipe is cracked?
Signs include recurring blockages, slow drainage, bad smells, and damp areas outside.
Is relining better than replacing a cracked pipe?
In many cases, yes — especially when the pipe is still structurally intact.
