Drainage Services in Horsham

Horsham lies within the Low Weald, an area of heavy clay soil that holds water well and drains slowly, keeping the ground saturated for extended periods after wet weather. The historic town centre has Victorian and Edwardian clay sewers, often combined, and the clay ground here means seasonal shrink-swell movement can gradually shift pipe joints out of alignment, contributing to root ingress and slow drainage in older streets.

The town's substantial 20th-century growth, including estates around Roffey and Broadbridge Heath, brought separate clay and later plastic drainage systems, generally performing adequately though still affected by the same clay ground movement seen across the district. On the rural fringes towards Warnham and Rusper, a number of properties are on septic tanks or small package treatment plants rather than mains drainage, and the heavy clay soil here means drainage fields need careful design and maintenance since percolation rates are naturally slow.

We approach Horsham drainage work with a CCTV survey first, particularly useful for tracking how clay ground movement may have affected pipe alignment over time. High-pressure jetting deals with root ingress and silt across the town's mixed-age pipework, and for the septic tank properties common on Horsham's rural edges we carry out percolation testing to check the drainage field is coping with the heavy local clay.