Groundworks in Sunbury
From the riverside properties of Lower Sunbury to the commercial hubs of the Common. We handle high water tables, sandy soil, and Spelthorne flood compliance.
Thames Valley Specialists
Sunbury geology is distinct from the Surrey Hills. You sit on River Terrace Deposits (sand and gravel) with a high water table. We have the specific pumps, trench support, and expertise to build safely near the river.
River Terrace Gravels
Unlike the clay of Bookham, Sunbury is built on Sand and Gravel. While this drains well, it is unstable when excavated. Without correct support, trench sides can collapse ("running sand"), endangering workers and nearby structures.
We use trench boxes and close-boarded sheeting to shore up excavations immediately. Furthermore, because the water table is linked to the Thames level, we employ high-capacity dewatering pumps to keep the work area dry during foundation pours.
Mandatory use of hydraulic trench boxes in KT16 to prevent side collapse in loose gravelly soil, ensuring site safety.
Strategic sump pumping and well-point dewatering to lower the local water table temporarily while we cast your concrete.
Living with the River
Lower Sunbury is beautiful but prone to flooding (Zone 2/3). We specialize in Property Level Protection for new builds and extensions, ensuring your home remains dry even when the Thames level rises at Sunbury Lock.
Non-Return Valves
Crucial for Sunbury properties. These prevent the main sewer from backing up into your home during high river levels.
Marine Grade Concrete
We use sulphate-resisting, waterproof concrete mixes for foundations and basements that sit permanently in the water table.
Tanking Systems
Type C cavity drain membrane systems that collect water entering the structure and pump it away safely, guaranteed.
Planning Resources
Spelthorne Council
Planning portal for applications in Sunbury, Shepperton and Ashford.
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