I am researching the replacement of a stone floor in an old Victorian greenhouse. The existing flags were obviously laid on a poor base, the vast majority of the 200 or so being cracked in many places and several have subsided to a dangerous degree.
Being as we are in Guernsey, the floor may well be Caen stone, but this is not too important.
My main question, for the sake of historical accuracy is- can anyone tell me if a dimension of 12 1/2" square is/was a standard ?
I think the answer will be that if Guernsey ordered foot-square slabs of french stone, around 1900, what they may well have got is French feet = 1.07app English feet, which roughly would be 12 1/2 inches.