Understanding Root Ingress: How Roots Damage Drains and How to Fix It
Roots and underground drainage systems are often a bad combination. While trees are a vital part of our environment, their roots naturally seek out moisture and nutrients, making drainage pipes an attractive target. Over time, this can lead to a problem known as root ingress - when roots penetrate and grow within drainage pipes, causing blockages, structural damage and even complete pipe failure.
In this blog, we’ll explore:
What root ingress is and why it happens
The different levels of root ingress
The damage it can cause
How a drainage survey can identify the problem
The best ways to resolve it
What is Root Ingress?
Root ingress occurs when tree or plant roots infiltrate underground drainage pipes through small cracks, joints or weak points. As roots grow, they thrive on the water and nutrients within the pipes, expanding and creating significant blockages. Over time, they can weaken the structural integrity of the pipe, leading to leaks, collapses and expensive repairs if left untreated.
The Different Levels of Root Ingress
Not all cases of root ingress are the same. The severity depends on factors such as the type of tree or plant, pipe material and how long the roots have been growing inside.
1. Early-Stage Root Ingress
At this stage, fine root hairs have begun to enter the pipe through tiny cracks or displaced joints. These roots may not yet be causing significant blockages, but they will continue to grow if left untreated.
2. Moderate Root Ingress
Here, the roots have grown thicker and more widespread within the drainage system. They start to trap debris, leading to slow-draining water and occasional blockages.
3. Severe Root Ingress
In advanced cases, thick roots have completely infiltrated the pipe, causing major blockages, reduced flow and potential structural damage. The pipe may even collapse if the pressure from the roots becomes too great.
What Problems Does Root Ingress Cause?
Root ingress isn’t just a minor inconvenience; it can lead to significant drainage issues and property damage, including:
Blocked Drains: Roots trap debris, grease and waste, leading to slow or completely blocked drains.
Structural Damage to Pipes: As roots expand, they exert pressure on pipes, causing cracks and even pipe collapses.
Leaks & Water Escapes: Small cracks from root ingress allow water to escape, potentially leading to subsidence and further pipe deterioration.
Foul Odours & Backups: Blocked drains can cause wastewater to back up into your property, leading to unpleasant smells and potential health hazards.
How a Drainage Survey Identifies Root Ingress
If you suspect root ingress in your drainage system, a CCTV drainage survey is the best way to confirm the issue. At Clearflow Surveys, we use advanced CCTV drain cameras to inspect your drainage system in real-time. Here’s how it works:
Inserting the Camera: A small, high-resolution camera is inserted into the drain to navigate through the system.
Identifying the Problem: The footage clearly shows any root ingress, cracks or structural damage within the pipe.
Assessing the Severity: We evaluate how far the roots have spread and whether a simple cleaning or a more extensive repair is required.
Providing a Report: A detailed survey report is provided, outlining the findings along with recommendations for the best course of action.
How to Fix Root Ingress in Drains
Once root ingress has been identified, it’s crucial to take action quickly. Here’s how a drainage contractor can resolve the problem:
1. Root Cutting & Removal
We work with specialist drainage contractors who use high-pressure water jetting or mechanical root cutters to remove the roots from the pipe. This clears the blockage but doesn’t prevent roots from growing back.
2. Drain Relining
To prevent future root ingress, the pipe can be relined with a durable resin liner. This seals cracks and joints, creating a smooth, root-resistant interior that strengthens the pipe without needing a full replacement.
3. Drain Excavation & Replacement
In cases of severe structural damage or pipe collapse, excavation and replacement may be necessary. This involves digging up the affected section and installing new, root-resistant drainage pipes.
4. Root Barriers & Preventative Measures
To prevent root ingress in the future, installing root barriers near tree roots can help. Additionally, choosing slow-growing, non-invasive trees or plants for planting near drains can reduce the risk.
Conclusion
Root ingress is a common but serious drainage issue that can lead to costly damage if left unchecked. A CCTV drainage survey is the most effective way to diagnose the problem, allowing for a targeted solution to remove the roots and repair the pipe. At Clearflow Surveys, we work closely with drainage contractors to ensure the right fix is applied, whether it’s root cutting, drain relining or full pipe replacement.
If you’re experiencing slow drainage, blockages, or suspect root ingress, contact Clearflow Surveys today for a professional CCTV drain survey and expert advice on resolving the issue.