Hi, We have a paving business and the costs for sharp/building sand,cement and membrane would be approx £75. It would take 2 days labour, 1 day to lay and return the next day to grout. We would charge £675 all in or £715 if you chose colured resin grout.It all depends on how much competition he has up there!!e have a paving business and the costs for sharp/building sand,cement and membrane would be approx £75. It would take 2 days labour, 1 day to lay and return the next day to grout.