To calculate your area in square meters, multiply the length by the height of each wall to be tiled. When ordering the tiles add an extra 10% for waste & cuts.
You will require an even, flat surface to tile on. Preparing the walls is a vital part of the tiling process - failure to do so will result in an unsatisfactory finish.
Waterproof wet areas according to the manufacturer’s specifications prior to tiling.
Cement render should be left to cure for at least 4 weeks and must be thoroughly dry before tiling. Old plaster is suitable, provided it is sound and well supported with the board being a minimum of 10mm thick and 12mm off the floor.
Planning your layout is essential. Choose your starting point to create a balanced visual appearance.
Trowelling should be done horizontally. Spread the adhesive onto the wall, working on small areas at a time. Tiles must be fixed before the surface of the adhesive forms a skin.
The tile is then adjusted to its final position with an up & down movement so that full coverage is obtained to the back of the tile. The size of trowel used should be approximately as follows:
Tile Size Trowel Size
152x152mm 6x6mm notch
200x200mm 8x8mm notch
250x250mm 10x10mm notch
300x300mm & over 12x12mm notch plus back buttering
Source: Australian Tile Council website