Soakaway Installation & Repair in Nottingham

Signs Your Soakaway Has Failed

The most obvious sign is garden or lawn flooding after moderate rainfall — not just after a prolonged downpour, but after an ordinary wet afternoon. Water that takes days to disperse after rain, or waterlogged patches that never fully dry between rain events, suggest the soakaway is no longer absorbing at the rate it should. If the soakaway is connected to a sewage treatment system rather than surface water drainage, a foul smell from the garden is an additional indicator of failure and requires prompt attention.

Why Soakaways Fail

Most failures come down to three causes. Silt and debris entering the soakaway over the years gradually fill the stone-filled void that provides drainage capacity, reducing absorption until it stops entirely. The surrounding soil can also become compacted or permanently saturated — both reduce the soil's ability to accept water regardless of how well the soakaway is built. And many older soakaways were undersized at installation, either because they were installed informally or because drainage requirements have increased since — additional paved surfaces, for example, that now drain to a soakaway designed for a smaller area.

Our Process

We begin with a site visit and percolation test to determine the soil's drainage rate and confirm whether the ground is suitable. The percolation test is not optional — installing a soakaway in ground that fails the test produces a system that will fail from day one, and we won't do that. For ground that passes, we design the soakaway to Building Regulations Part H requirements, excavate and install the new or replacement unit with appropriate geotextile membrane and inlet protection, and reinstate the surface. Where the ground does not pass, we discuss alternatives — attenuation tanks, connection to the surface-water drainage system, or connection to a highway drain where permissible.

New-Build vs Replacement

We install soakaways as part of new construction — for extensions, new properties, or new drainage connections — and as replacements for failed existing units. Where a failed soakaway was undersized for the area it serves, we upsize accordingly rather than replicate the original mistake. For surface water from new extensions, Building Regulations require an approved drainage solution before completion.

Related services: drainage repairs, blocked outside drain, domestic drainage services.