New patio slabs are turning brown, I told the builder as soon as he completed the job. He said they were natural stone and you can expect this to happen He used brick and patio cleaner on the brown slabs and this seemed to cure problem for a short while, but the brown staining has returned again but not on all slabs. Please can anyone advise me.
can u provide a photo? it's difficult to diagnose the cause of the staining from your description.
the cause of the stain will determine the remedy. if it's natural variation in the stone you are stuck with it. if, however, it's staining caused by cement mortars and grouts then you have an issue with your builder.
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