HOME EXTENSION.com
SUCCESSFULLY EXTENDING YOUR HOMEFoundations
NHBC Foundation Depth Calculator
NHBC used to provide a Foundation Depth calculator that allowed users to simply line up a tree height and tree distance, then read off the foundation depth. It may not be available now?
There is however a useful free NHBC foundation guide booklet: nhbc foundation guide – FREE BOOKLET
Or check foundation depths with Local Authority Building Control – LABC’s foundation depth calculator
Concrete mixes