Use ardex S16 (no it is not a fighter jet) combined with fine sand, aggressiveley floated and allowed to thoroughly dry. If neccessary level with bonding coat plaster to assure a good finish/
I was told you have to wait three days before grouting when you tile over existing tiles.......is this the case? If so why? Also do i need to use any bonding agent on the tiles to be tiled over or special adhesive?
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