150mm above outside ground level. Internally the floor can go where you like, provided the damp proof membrane goes up the sides to marry with the dpc.
You could block n beam or timber joist the floor, after first digging out a void for airflow.
or you'll get away with 100mm for foot traffic, 150mm for vehicle traffic if concreting straight down. (plus hardcore/insulation etc.) Mesh is a must.
I see you own a spade, how's your back?
You could block n beam or timber joist the floor, after first digging out a void for airflow.
or you'll get away with 100mm for foot traffic, 150mm for vehicle traffic if concreting straight down. (plus hardcore/insulation etc.) Mesh is a must.
I see you own a spade, how's your back?