Groundworks is the trade where Nuneaton differs most from the towns around it, and the reason is that this town has been dug up for a very long time for three different reasons.
Coal has been mined here since the fourteenth century. Clay was dug for brick making. And granite was quarried on a scale that left Mount Judd standing as a spoil tip from the Judkins workings. The consequence for anybody putting in a foundation is that ground conditions vary sharply over short distances, and a plot three streets away tells you very little about yours.
Rock close to the surface is the most common surprise. It is excellent to found on and expensive to get through, and the difference between a dig and a break out is not a small percentage on a price, it is a different job with different plant. Backfilled ground is the opposite problem: easy to dig and not something you want to found on without knowing what is in it and how deep it goes.
Because of all that we put trial holes in before the design is fixed, not after. It is the single most useful hour anybody spends on a Nuneaton project, and it turns the largest variable in the price into a known quantity.
Everything is inspected before it is covered. Our footings and excavation page explains our approach.