🎨 Painter Decorator guide

How to tile a bathroom wall

⏱ 1-3 days 📊 Difficulty: Hard 📅 Updated 2025

Tiling a bathroom wall is achievable for a careful DIYer on a small area. On a full bathroom, or where accuracy is critical (shower enclosures especially), the margin for error is small and mistakes are expensive. This guide covers the correct approach that professionals use.

Find a local painter decorator → 💬 WhatsApp
✓ Expert-written guide ✓ Difficulty: Hard ✓ Time: 1-3 days ✓ Professional painter decorators available UK-wide

What you'll need

Tile adhesive and grout
Notched trowel
Tile spacers
Tile cutter or angle grinder with diamond blade
Spirit level
Grout float
Grout sponge
⚠ Safety first

In shower areas, getting the waterproofing right is critical. Tiled-over non-waterproof areas will rot the structure behind. Use waterproof backer board and apply tanking membrane before tiling.

Step-by-step guide

  1. Prepare the surface
    Walls must be flat, sound, and dry. Plasterboard needs priming. Old tiles can be tiled over if firmly fixed and flat. Remove any loose plaster. In wet areas (shower enclosures), use waterproof tile backer board rather than standard plasterboard.
  2. Plan your layout
    Measure the wall and mark the centre. Dry lay tiles on the floor first to work out your layout — you want the cut tiles at the edges to be equal and at least half a tile wide. Avoid tiny cuts in prominent positions.
  3. Set a datum line
    Use a spirit level to draw a perfectly horizontal line across the wall at the height of your first row. Use a batten (a straight piece of timber) pinned to the wall along this line to give your first row of tiles a flat base.
  4. Mix and apply adhesive
    Mix adhesive to a thick peanut butter consistency. Using the notched trowel, apply to the wall in sections of about 1 square metre — enough to lay 6-10 tiles before it skins over.
  5. Lay tiles from the centre
    Start at the centre of your datum line. Press each tile firmly onto the adhesive with a slight twisting motion to ensure full contact. Insert spacers at every corner. Check for level constantly.
  6. Make cuts
    Measure each cut tile individually — walls are rarely perfectly square. Score and snap with a tile cutter for straight cuts. Use an angle grinder with a diamond disc for L-shapes and notches.
  7. Leave to set
    Leave adhesive to cure for 24 hours minimum before grouting. Remove spacers and check all tiles are firmly fixed.
  8. Grout
    Mix grout to a thick paste. Apply diagonally across the tiles with a grout float, pushing it firmly into all joints. Wipe excess off immediately with a damp sponge. Polish residue off with a dry cloth once haze forms.
💡 Pro tip

Professional tilers never rush adhesive coverage. They back-butter (apply adhesive to the tile back as well as the wall) for large tiles and critical areas — this ensures 100% coverage and no hollow spots.

Expert tips for the best result

  • The datum line and centre point are everything — get these wrong and every row of tiles compounds the error
  • Use a 6mm notched trowel for wall tiles up to 300mm and a 10-12mm notch for larger tiles
  • Bathroom tile spacers: 2mm for a contemporary look, 3-5mm for a more traditional feel
  • Silicone sealant (not grout) in all internal corners and at the bath/wall junction — grout cracks here
  • Large format tiles (600mm+) are trendy but much harder to lay perfectly — start with 300mm tiles

Useful tools and products

Shop on Amazon → Screwfix → Toolstation →

When to call a professional painter decorator

Full bathroom tiling, large format tiles, herringbone or complex patterns, any work around baths and shower trays requiring precise waterproofing, or if the walls are uneven and need preparation work.

We connect you with vetted local painter decorators across the UK — fast response, free quotes, guaranteed work.

💬 Get a free quote via WhatsApp

Frequently asked questions

How difficult is how to tile a bathroom wall for a beginner?

This guide is rated Hard. Tiling a bathroom wall is achievable for a careful DIYer on a small area. On a full bathroom, or where accuracy is critical (shower enclosures especially), the margin for error is small and mistakes a If you're not confident, a professional painter decorator can do this quickly and provide a guarantee on the work.

How long does how to tile a bathroom wall take?

Allow 1-3 days. This assumes the tools and materials are ready before you start. First-timers should budget extra time for preparation and any unexpected issues.

How much does a painter decorator charge for this in the UK?

Most painter decorators charge £40-80 per hour depending on location and complexity. For a straightforward job like this, expect 1-2 hours of labour plus materials. Get a fixed quote via WhatsApp — message us with your postcode and job details.

How do I find a reliable painter decorator near me?

WhatsApp us with your postcode and job description. We match you with a vetted local painter decorator from our network — most jobs get a response within the hour. Contact us here.