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Discuss Caulk over Grouted Change of Planes? in the Canada Tile Advice area at TilersForums.com.
No, leave the internal corners empty of adhesive and grout then fill with silicone not caulk, it's an expansion joint and needs to be allowed to move, filling with grout will stop this
Matt
Reply to Caulk over Grouted Change of Planes? in the Canada Tile Advice area at TilersForums.com