Underground Services

What a lawn can tell you: why this dry summer is a detection window for hidden water damage

15th July 2026

Across much of England, gardens are telling the story of the summer so far. The Environment Agency reports that every region now has drier than average soils, with very dry conditions across eastern, south-eastern and central England, and several water companies have introduced temporary use bans. With soil moisture deficits continuing to develop quickly across the country, lawns are browning and borders are wilting.

Against that backdrop, one detail is worth a second look. A patch of lawn that stays vivid and green while everything around it fades is rarely a happy accident. In a prolonged dry spell, it is often the clearest indication a homeowner will ever get that water is escaping underground, whether from a supply pipe or a defective drain.

Why dry weather reveals what wet weather hides

Underground escapes of water are among the most difficult losses to detect. Typically in the UK, a slow leak beneath a garden, patio or driveway can run unnoticed for months because the surrounding ground is damp anyway, and the consequences, from damp ingress to washed-out soil beneath foundations, tend to surface only once they are far more disruptive and expensive to put right.

A summer like this one can change this as soil moisture deficits build, an unusually lush patch of grass, persistently damp paving or soft, sunken ground becomes a meaningful signal as for a brief window, the ground itself is doing the leak detection.

A timely opportunity for claims teams

The scale of the underlying issue is well documented. Ofwat reports that around a fifth of treated water in England and Wales is still lost to leakage, and notes that leaks can worsen during very dry weather as pipes expand and contract in the ground. A meaningful share of that leakage sits on the customer’s side of the boundary, where supply pipes and drains are generally the property owner’s responsibility, and analysis for Ofwat found that private supply pipe leakage accounted for nearly a quarter of the national total. When those pipes fail, the cost of detection, access, repair and any resulting damage frequently falls to the home insurer, so every leak identified while it is still a garden anomaly rather than a damaged home represents a materially better outcome for customer and insurer alike.

There is a further reason to look underground this summer. Prolonged dry weather stresses buried pipework as shrinking clay soils move and crack older drains, and a leaking drain is in turn one of the established contributors to subsidence, where the escaping water gradually softens or washes away the supporting ground. With the ABI reporting that domestic subsidence payouts reached a record £307 million in 2025 following the hottest summer on record, the connection between drainage integrity and ground stability deserves a place in every surge conversation.

The benefit to insurers

The insurers best placed to benefit from this window will be those who treat it as one. Seasonal customer communications and first notification scripts can prompt policyholders to look for and report the outdoor indicators described above, and to note when they first appeared. Triage questions can be extended to cover drainage, supply pipes and ground conditions from day one, so that a potential underground escape is routed to investigation early rather than waiting for internal or more extensive damage to confirm it.

From there, the priority is establishing cause before committing to a repair pathway. Early leak detection and CCTV drainage surveys cost a fraction of remediating the damage an undetected leak will eventually cause, and environmental data such as soil moisture and rainfall records helps distinguish a hidden leak from seasonal ground movement. Front-line handlers also benefit from a clear brief on what these indicators mean, so that customer conversations are confident and well explained and the outcome is a problem genuinely put right rather than simply settled. Capturing cause and location data as claims come through then builds a picture of emerging hotspots that will sharpen triage for the next dry spell.

This is the approach our underground services specialists at Claims Consortium Group take with insurers, combining drainage and leak detection expertise with WeatherNet environmental data to establish cause quickly and act before damage develops. This summer, the evidence is written on the lawn and the opportunity lies in knowing how to read it.