We've decided to dig up our lawn and lay a patio...originally, after a visit to the shop we were going to put 4inches of hardcore down etc etc. However, I'm sure that once upon a time (I think on Ground Force!) I saw them simply mix some sort of powdered conrete/mix into the soil and that the moisture in the soil set it hard enough to lay sand across the top and the slabs on top of the sand - I know this isn't the best idea, but money is incredibly tight and so is time.....can anyone tell me if this is an idea that has merit....???