john westmore_______ wrote:
I have just pulled down my small disintegrating wooden shed leaving a
concrete slab 1.76 metres by 2.33metres.

We thought we would buy on the tin sheds from Argos, which is 3
metres by 2.5 metres.

1.5 litres per ballast

Try again, but this time have a stab at explaining what you are talking
about....1.5litres per ballast? - what is that meant to denote?