Royal Leamington Spa developed rapidly during the Regency period in the early 19th century, and its elegant terraced streets were built on Blue Lias clay. The drainage beneath these Regency and Victorian properties is predominantly original clay pipe, and it is now between 150 and 200 years old. Our drainage engineers working in the CV31 and CV32 streets around The Parade, Clarendon Square, and the terraced rows off Newbold Terrace are dealing with pipe systems that were designed for a different era of domestic water use. Root ingress from the mature trees that line many of Leamington's residential streets is the single most common cause of drainage failure in the historic town.
Blue Lias clay is a reactive soil that behaves in ways that directly affect drainage performance. It expands significantly when it absorbs water and contracts when it dries. That seasonal movement exerts pressure on buried clay pipe joints, gradually displacing them and creating the gaps that tree roots exploit. Our engineers survey these pipe joints carefully during CCTV inspections in Leamington Spa because the displacement is often subtle but consistent across multiple joints in a run. A pipe that looks blocked by roots at one point is almost always compromised by ground movement at several others.
The River Leam flows through the town and creates a specific flood risk for properties on its banks and in the lower-lying areas between the old town and the new town. Properties in the Brunswick Street area, along the riverbank, and in the streets north of Jephson Gardens can experience basement flooding when the Leam rises during heavy rainfall. Drain unblocking Leamington Spa residents contact us about in these areas often involves sewage backing up through basement floor drains when the drainage system cannot discharge against a rising river level.
The large Victorian and Edwardian properties across Leamington that have been converted into flats and HMOs present a particular drainage challenge. Drain unblocking Leamington Spa calls from converted properties often reveal shared drainage systems where the ownership and responsibility for repair is unclear. We assess the drainage layout during CCTV survey and advise on the boundary between private and shared public sewer, which in Leamington's older streets is sometimes the subject of dispute between neighbouring property owners. Our engineers also cover the neighbouring towns of Warwick and Kenilworth, both of which share similar Blue Lias clay challenges.