I have recently had my patio laid with Indian sandstone. The stone looks great and the guy who laid it was professional and maticulous in his work so I guess this is not his fault, if indeed there is a fault at all.
A lot of the slabs now have white stains around the adges and one stone particular has gone almost completely white. The stones are surrounded by bricks and a lot of these have gone white too. The stains disappear when it rains or has water thrown on them but they re-appear when the slabs dry out. I read somewhere that it is salt and is quite normal for it to happen but I need to know if I need to do anything.
Any help would be greatly appreciated. I can send photos to anyone who would like to help me out (of the slabs that is!)