Groundworks in Kettering are dominated by what the existing buildings are standing on, and on the older housing that is frequently very little.
The artisan terraces were built quickly and economically, and their foundations reflect that. It is not unusual to find a wall sitting on a couple of corbelled courses of brick barely below ground level. Those buildings have stood for a century and a half perfectly happily, and they will continue to, provided nobody opens a deep trench alongside one in a single go on a Friday afternoon.
So the sequence matters more than the speed. We dig in short lengths, support as we go, and where a new foundation has to be significantly deeper than the existing one we design the connection rather than improvise it. If the honest answer turns out to be underpinning a section rather than trenching past it, we will say so.
On the larger houses the foundations are deeper and the margin greater, but it is still a matter for a trial hole rather than an assumption. That hole is the most useful hour spent on a Kettering project.
On shrinkable clay a foundation near a mature tree goes deeper than standard. Everything is inspected before it is covered. Our footings and excavation page explains how we approach foundations and site preparation.