House being rented out for a while and tenants wont want to do gardening ,s o ieant to cover the front garden with membrane and gravel. So how much of the larger gravel ( ??20mm) do i need to buy to cover 4.8m X 3 m to a suitable depth ?a couple of inches (5cm)
the volume is easy , but they sell the stuff by weight. So whats the density of larger size gravel ?
thanks
paul