Patch a tiled wall

Here's how

Step 1 Protect bath with drop sheets. Remove tapware and cover tap spindles with tape.

Step 2 Wearing safety goggles and gloves, use hammer and cold chisel to knock out broken tiles. Be careful near unbroken areas. Clean off remaining tile glue so wall is smooth.

Step 3 Mix 4 parts water to 1 part BondCrete. Paint onto bare wall and let dry. Mix another solution, now 1 part water to 4 parts BondCrete, and apply a layer to the same area.

Step 4 Mix Sand & Cement mix with water to make cement render. Make the mix moist but not runny. While BondCrete on wall is still ‘tacky’, apply cement
render using scraper. Render should sit out from wall surface. Leave for 30 minutes or so until it starts to set. Using large broad knife, run along existing wall and onto new render, scraping off excess so render is flush with wall. Leave for 24 hours.

Step 5 Apply waterproofing membrane to new render following pack instructions.

Step 6 Using tile cutter, cut tiles to fit. Mark locations of tapware on tile. Using diamond tipped hole saw, drill holes.

Step 7 Mix tile adhesive. Make sure your adhesive is compatible with a waterproof membrane. Using notched adhesive spreader, butter back of tile with adhesive. Press tile into position so it aligns with adjacent tiles. Hold in position using tile wedges.

Step 8 Grout joins between tiles only (do not grout corners or the join between tiles and bath). Wipe off excess using a clean, damp sponge and let dry. Polish tiles with a dry cloth.

Step 9 Apply tape along both edges of wall corner and at junction of tiles and bath. Cut nozzle of silicone at a 45° angle, slightly wider than joint to be filled. Slowly run silicone down joint making sure it is completely filled. Using a finger dipped in soapy water, smooth surface of silicone to edges of tape. Carefully remove tape and leave silicone to cure. Replace tapware.