Pipe relining (also called cured-in-place pipe, or CIPP) is a trenchless repair method: instead of digging up a broken pipe and replacing it, a new pipe is formed inside the existing one.
The process in outline:
- The drain is cleared and cleaned — roots cut, scale and debris jetted out — so the liner can bond properly.
- A CCTV inspection confirms the pipe's condition and measures the section to be lined.
- A flexible liner saturated with resin is inserted into the pipe, then inflated with air or water pressure so it presses firmly against the old pipe wall.
- The resin cures — either ambient, hot water or UV cured depending on the system — forming a hard, jointless new pipe.
- A final camera pass verifies the finished liner.
Why it is often preferred over digging: no destroyed driveways, retaining walls, landscaping or floors; access is usually through existing openings; and the finished liner is a continuous pipe with no joints for roots to re-enter. Sections under buildings, concrete or established gardens — where excavation is disruptive or near-impossible — are where relining shines.
Its limits: the host pipe must hold its shape well enough to be lined. Fully collapsed pipe, badly back-graded runs, or pipes crushed flat generally need excavation for at least that section. Patch liners cover isolated defects; full-length liners treat pipes with damage throughout.
A camera inspection determines which repairs suit which sections — reputable operators will show you the footage behind the recommendation.