Need a New Soakaway? We'll Design It Around Your Ground in Birmingham

A soakaway is a buried chamber that collects surface water — from roofs, drives and paved areas — and releases it slowly into the surrounding ground. Done properly, it is the cleanest way to dispose of rainwater where no main drainage connection is available or wanted. Done badly — guessed size, wrong location, no regard for soil — it stands full after the first heavy rain and does nothing. This page is about doing it properly.

Whether a soakaway will work on your ground

A soakaway depends entirely on the ground accepting water. Free-draining soils — sands, gravels, loams — drink readily. Clay and compacted ground may accept water slowly or barely at all, and in ground that will not drink, a soakaway is the wrong solution however well it is built. That is why we test before we design: trial holes dug in several spots, filled and timed, give us the infiltration rate that decides feasibility and sizing. Where the ground is poor, the honest alternatives are land drainage carrying water to a working outfall, relocation to better ground if the site has any, or a pumped solution — and we will say which applies rather than sell you a pit in clay.

Sizing it correctly

A soakaway is calculated from two things: the area it serves — roof area, plus any paved or drive area draining into it — and the measured infiltration rate of the ground. Bigger roof, slower soil, bigger soakaway. An undersized soakaway fills in one storm and overflows back up the run; an oversized one wastes money and ground. We also position it sensibly: far enough from buildings for safety — building foundations do not appreciate sitting beside saturated ground — with a sensible fall from the drain run, and clear of trees whose roots seek water. Sited and sized properly, a modern crate or ring soakaway serves a property for decades.

How the installation works

This is quoted-project work. Survey first: infiltration testing, area measurement, level checks, and locating a route from the existing drain run to the soakaway position. Before any digging we check carefully for buried services using detectors where appropriate — no scan guarantees what is below, and utility plans are the customer's responsibility to provide. Then the dig: excavation, the chamber built from geocellular crates or precast rings wrapped in permeable geotextile, connection to the drain run — ideally with a silt trap so the new pit does not silt quickly — backfill and reinstatement of the surface.

The estimate for this job covers one working day of that project on an agreed scope; a full installation typically takes longer depending on ground, access and weather, and we stage the work and keep you informed. Groundworks are weather-sensitive: digging saturated ground makes a mess and weakens the excavation, so we schedule sensibly and say when rain should delay the work.

Permissions and honesty

Permissions around how surface water is disposed of — and whether a soakaway is permitted where you are — are the customer's responsibility to check; we explain what is involved but do not make compliance promises. And we are honest about limits: a well-built soakaway handles ordinary rainfall well, but extreme storms and water arriving from beyond your boundary are beyond any single-property system. No guarantee of a dry garden comes with any drainage.

Booking

Book an assessment visit and tell us what the soakaway will serve — roof area, drive, both — and anything you know about the ground, past drainage and services. If you have old plans or a preferred location, share them. The survey informs the quote; the installation follows once you approve the price and a suitable weather window.