I'm looking to find out the most cost effective was of establishing the Volume Change Potential of the soil where our new extension will be built.
Using the NHBC Depth Calculator App, I need to find out the Modified Plasticity index to establish whether or not heave protection and a block and beam floor with a void is required as opposed to a standard sub base floor with screed.
Apologies if any of my terminology is out!
Can anyone provide any advice please?
Thanks in advance.