How to Tile a Bathroom

Planning Your Tile Layout

Before buying tiles, measure the area carefully and calculate how many you need (add 10–15% for cuts and waste). Plan the layout on paper first — you want to avoid ending up with thin slivers of tile at visible edges. Start from the centre of the wall or a prominent feature.

Preparing the Surface

Tiles must be fixed to a solid, stable surface. Existing tiles can be tiled over if sound. Plasterboard walls need a specialist tile backer board in wet areas — never tile directly onto standard plasterboard in showers. Remove any loose paint or plaster.

What You'll Need

Wall tiles and adhesive, tile spacers, a notched adhesive trowel, a tile cutter (wet saw for porcelain, score-and-snap for ceramic), grout and a grout float, sealant for edges, a spirit level, a drill with paddle mixer for mixing adhesive, and safety glasses.

Applying the Adhesive

Mix adhesive to a smooth, lump-free consistency. Using a notched trowel, apply adhesive to the wall (work in sections of about 1 square metre). Comb the adhesive in one direction. Press tiles firmly into place with a slight twisting motion.

Keeping Tiles Straight

Use a spirit level constantly. Insert spacers between every tile to maintain even grout joints. Step back regularly to check the overall alignment. Any errors compound quickly — catch them early.

Cutting Tiles

Measure each cut carefully. Score-and-snap tile cutters work well for straight cuts on ceramic tiles. A wet diamond saw gives cleaner cuts and handles porcelain. Always wear safety glasses when cutting tiles.

Grouting

Allow adhesive to cure for at least 24 hours before grouting. Remove tile spacers. Mix grout to a smooth consistency and apply diagonally across the joints with a rubber float. Wipe off excess with a damp sponge before it hardens. Leave to cure 24–48 hours.

Sealing Edges

Apply silicone sealant (in a matching colour) along internal corners and the joint between tiles and the bath or shower tray. Silicone is flexible and prevents cracking where two surfaces meet. Smooth with a wet finger and leave 24 hours before use.