Drain Lining Services | Smart Drain UK
What is drain lining?
Drain lining is a trenchless repair method used to restore damaged or deteriorating pipes without the need for excavation. Rather than removing the existing pipe, a resin-impregnated felt liner is inserted into the pipe and positioned in place. Once cured, the resin forms a durable, watertight inner layer that effectively creates a new pipe within the old one.
This method offers a cost-effective and minimally invasive alternative to traditional pipe replacement, eliminating the need to dig through floors, driveways, or landscaped areas.
How does the drain lining process work?
If you’re dealing with recurring drainage issues, buying a property, or planning building work near a sewer, a CCTV drain survey is the best way to find out exactly what’s going on underground.
Using high-tech cameras, we inspect your drainage system, identify any faults, and provide a detailed report with recommendations. Whether it’s tree roots, cracked pipes, or collapsed sections, we’ll diagnose the problem and advise on the best fix, as well as provide you with a detailed report.
The Drain Lining Process
Drain lining is carried out through a precise, step-by-step method to ensure a durable, long-lasting repair:
- Initial Cleaning
The existing pipe is thoroughly cleaned using high-pressure water jetting or mechanical cutting to remove debris, scale, or root intrusions. - Liner Insertion
A flexible felt liner, pre-impregnated with a two-part epoxy resin, is carefully inserted into the pipe. - Inflation and Moulding
An inflatable packer is used to press the liner firmly against the inner wall, conforming it to the pipe’s shape and diameter. - Curing
The resin is allowed to cure in place, solidifying into a tough, seamless new pipe wall approximately 3mm thick.
This no-dig method effectively seals fractures, blocks root ingress, and reinforces structural integrity—all without the disruption of excavation.
Full drain lining vs. Patch lining
There are two main types of lining approaches, depending on the extent of the damage:
Full Lining
Full lining is applied to extended sections of pipework, usually spanning between access points such as manholes. It’s an effective solution for addressing extensive damage, deterioration, or general wear along the entire length of a drainage run.
Patch Lining
Patch lining is designed for targeted repairs, such as addressing small cracks or damage in specific sections of an otherwise intact pipe. For instance, if a minor crack occurs 12 meters into a functional pipe, a patch can be applied directly to that area. This method is quicker, more cost-effective, and less disruptive than replacing the entire pipe.
What are the benefits of drain lining?
No Excavation Needed
Perfect for pipes located beneath homes, kitchens, bathrooms, driveways, or landscaped areas.
Cost and Time Efficient
Eliminates the need for digging, reduces labor costs, and accelerates the repair process.
Long-Term Durability
Strengthens weakened pipe walls and prevents future root intrusion.
Minimal Disruption
An ideal solution for urban or residential areas, where excavation would cause significant disruption.
When Is Drain Lining Not Suitable?
Although drain lining is highly effective in many situations, it may not be the best solution in certain cases:
- Fully Collapsed Pipes – If a pipe is completely collapsed or crushed, lining will not be feasible.
- Severe Cracks or Fractures – Pipes with extensive damage may be at risk of bursting during the inflation process.
- Unstable Surrounding Ground – If the soil around the pipe has eroded or washed away, the pipe may lack adequate structural support.
In these instances, traditional excavation and pipe replacement may be necessary. Should digging be required, we can assist with that as well.
Ready to repair your drains without the mess?
If you’re facing issues with leaking, cracked, or root-infiltrated drains, drain lining could provide a quick, clean, and cost-efficient solution.
