United Kingdom · answered by Verika · verified against sources
What foundation depth is needed in clay soil?
In clay soil, foundation depth must be ≥0.75m (low shrinkage), ≥0.9m (medium shrinkage), or ≥1.0m (high shrinkage) to avoid ground movement; frost protection requires ≥0.45m (increased in frost-prone areas).
Every answer carries its source — tap a citation to read the official document.
This answer came from Verika — an expert in your pocket. Ask anything, out loud or typed; answers come from your region’s regulations and your team’s own knowledge, cited to the source. If it isn’t in the sources, Verika says so.
Verika provides information with citations to help you find and understand the rules that apply to your work. It is not a substitute for professional engineering or legal judgment. Answer generated 2026-08-28; always confirm against the cited source for your project.
More United Kingdom answers
- How deep do strip foundations need to be?
- What do I need to do about silica dust when cutting concrete?
- What are my duties under CDM 2015?
- Who is responsible for health and safety on a construction site under CDM?
- How do I prevent cement burns when working with concrete?
- What PPE is needed when handling wet cement?