Hello to all, I would like some advice please as regards what type of wall tile adhesive I require to carry out a small tiling job in a bathroom which will include an area which will be subject to a shower above the bath. The shower isn't a power type but an electric shower with no pump so there isn't a great deal of water pressure. The tiles to be fixed are 100mm square limestone which have an irregular surface finish and range from light beige to brownish in colour. The walls already have ceramic wall tiles fitted and to save a great deal of time and mess I was hoping to tile on tile using a ready mixed tile adhesive. The new limestone tiles will have a grout joint of 3 to 5mm. Thanks for any advice.