King of the Monkeys
Member
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- 10
In my experience, yes the staining will continue to come through. It can be reduced by lots of coats of lime wash as this will reduce water penetration into the wall and hence drawing out of water soluble filth / sulphates. Also make sure that you have good flaunching / drip etc at the top of the stack to prevent water getting in this way, and then drying out lower down through the render.