Indian Sandstone White Stains

Postby gratian » Mon Sep 22, 2008 12:36 pm

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!)
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Simply Build It

Postby TheDoctor4 » Mon Sep 22, 2008 3:24 pm


This sounds like Efflorescence. If you have a look at the DIY Doctor project relating to this it may provide you with a little more information:

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