Just out of curiosity how is it done on an existing floor.Oh, its not required under BS site workmanship standards, NHBC or TRADA guides then?
Or is it just that those four authorities didn't bother?
Incidentally I've submitted plans to every authority in Co Durham, Tyneside, as well as Tynedale and two of the Teeside authorities as well as Richmondshire, never been asked for once.