I am laying a new patio in my back garden 30sq meters. I've put down about 3 jumbo bags of MOT type 1, on top of that I have 1inch of sharp sand. I have managed to lay one side of the garden top to bottom. Unfortunately I had a problem at the bottom end of the garden when it started to rain, on standing on the slabs they started to move about, through the gap I could see a lot of water in the sand. I move the sand away thinking maybe the subbase was loose, but I was wrong it is solid. Also on moving the sand away I was expecting it to be water logged but it wasnt. I was think perhaps i should add some cement to the sand to make it solid, so when it rains it's still has a sold base and the sand won't turn to mush. At the top end there is no such problem.
Please advise
Please advise
