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Can you tile on moisture resistant plasterboard?

Yes, it is possible to tile directly to our Gyproc moisture resistant (MR) grade boards without any pre-treatment, following the tile adhesive manufacturer's guidance. Before tiling commences, joints and taper recesses included within the tiling area should be filled with tile adhesive, then the tiles installed as per the manufacturer's guidance. Consider applying a proprietary tanking system to the boards prior to tiling for additional protection. 

Where designs include part-tiled areas, e.g. low moisture environments, apply a layer of Thistle Bond-It when using MR boards prior to the board being plaster skimmed above the line of the tiles.

You can find further tiling guidance, including system-specific stud centre requirements from page 8.29 onwards of the White Book Finishes section, here.