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I am installing ditra over OSB board and there is a floor vent in the one wall inside the bathroom. The sheet metal is folded out and there is about 2-3 inches of the sheet metal that stick out onto the floor from under the baseboard. The Ditra will go over the sheet metal and I wanted to know what is the best https://www.tilersforums.com/forums/tile-adhesive/ to use that will make the Ditra adhere to the sheet metal.