GROUND CONDITION GUIDE
London Clay: early screening should account for ground variability and moisture context.
Clay-rich ground can be affected by moisture-related volume change, and conditions may vary across a site and with depth. The local ground model, drainage, vegetation, site history and investigation evidence need consideration before a foundation solution is designed.
Site investigation: use appropriate factual and interpretative information rather than assuming formation properties from a postcode or broad geological map.
Water and vegetation: consider drainage, trees, surfacing and seasonal moisture effects as part of the broader ground-context review.
Foundations: do not infer bearing capacity, settlement, depth or heave protection from an online screen.
Specialist review: bring the ground investigation, structural loads and site layout together in a formally accountable design process.