A RICS consultant told me some time back but I did not take a note and do not remember the figure now and cannot find the figure on googling. All I remember is that it was less depth than I would have thought. For double skin brick construction , there is a limit to the amount of property level protection against flooding . Beyond that , if you keep the water out , then the static water pressure will push in the walls and you get complete structural failure, ie more life threatening than any (non flash-flood) flooding
- posted
9 years ago