How to Tile a Bathroom Floor
A comprehensive guide covering layout planning, cement board preparation, tile cutting, grouting, and sealing. Follow these steps for a professional, durable finish that lasts decades. Suitable for ceramic, porcelain, and natural stone tiles.
Prepare the Subfloor
The subfloor must be clean, flat (within 3 mm over 3 m), and structurally sound before any tile goes down. High or low spots will cause tiles to crack. Install cement board over timber subfloors.
Plan the Layout
Find the room's visual centre and dry-lay tiles outward to confirm your layout. You want cut tiles at perimeters to be at least half a tile wide — this avoids the 'slivers of tile' look.
Mix and Spread the Thinset Mortar
Mix thinset to a smooth peanut-butter consistency. Spread in small sections (about 1 m²) using a notched trowel — small sections prevent the mortar from skinning over before tiles are set.
Set the Tiles
Press each tile firmly into the mortar with a slight twisting motion, then use a rubber mallet to seat it level. Check every 3–4 tiles with a straight edge to catch any lippage early.
Cut Border Tiles
Measure and mark each border tile individually — cuts are rarely the same dimension. Use a wet saw for straight cuts and an angle grinder with a diamond blade for curves and notches.
Allow Mortar to Cure, Then Grout
Wait a minimum of 24 hours (48 for large tiles or natural stone) before grouting. Mix grout to a smooth consistency and apply diagonally with a rubber grout float, firmly filling every joint.
Clean Haze and Seal
Clean the grout haze before it fully hardens, then seal both the grout and any natural stone tiles with a penetrating sealer. Resealing annually in shower areas will keep grout looking new.
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Safety & Legal Disclaimer
This guide is for informational purposes only and does not constitute professional engineering, architectural, or contractor advice. Building codes vary by jurisdiction — always verify local requirements, obtain all required permits, and consult a licensed contractor or structural engineer before beginning any construction project. Aribuilds makes no warranty as to the accuracy, completeness, or suitability of this information for any particular project. Use of this guide is at your own risk. Aribuilds accepts no liability for personal injury, property damage, structural failure, or code violations.
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