How to Tile a Bathroom Wall: A Beginner’s Step-by-Step Guide

Tiling a bathroom wall is one of those jobs that looks intimidating until you actually do it — then you realise it’s mostly patience and preparation. The tiling itself is genuinely satisfying once you get into a rhythm.

I’ll be honest: your first wall won’t be perfect. Mine certainly wasn’t. But it’ll be more than good enough, and by the second wall you’ll wonder why you ever considered paying someone £300+ to do it for you.

This guide walks you through the entire process from planning to grouting, with all the tips I wish someone had told me before I started.

Planning Your Tile Layout

The biggest beginner mistake isn’t poor cutting or uneven adhesive — it’s starting without a plan. Spend 30 minutes planning and you’ll save hours of frustration later.

Choosing Tile Size and Pattern

For a first tiling project, I’d strongly recommend going with standard rectangular wall tiles — 250mm × 400mm or 300mm × 600mm. Larger format tiles (like 600mm × 600mm) look stunning but they’re heavier, harder to handle, and far less forgiving of walls that aren’t perfectly flat. Save those for your second project.

Pattern options for beginners:

• Brick bond (offset) — each row offset by half a tile. Forgiving of slightly uneven walls and looks great. This is what I’d recommend for a first timer.
• Stack bond (grid) — tiles lined up in a straight grid. Looks clean and modern but shows up any unevenness immediately.
• Herringbone — beautiful but involves a lot of cuts and isn’t a beginner project. Work up to this one.

Measuring and Ordering (Always Add 10%)

Measure the total area you’re tiling: height × width of each wall section, then add them together. Deduct any windows or doors.

Then add at least 10% for waste. You’ll break tiles, make bad cuts, and discover some tiles are slightly different sizes (especially with cheaper tiles). If you’re doing a pattern with lots of cuts, add 15%.

Order all your tiles from the same batch. Tiles from different batches can have slight colour variations that are invisible in the shop but glaringly obvious on your wall. The batch number is printed on the box.

Preparing the Wall

Wall preparation is genuinely half the job. Tile over a bad surface and the tiles will crack, come loose, or look uneven. Get the wall right and the tiling is the easy part.

Removing Old Tiles

If you’re tiling over existing tiles, you have two options:

• Remove the old tiles — the proper way. Use a bolster chisel and hammer, starting at an edge or grout line. Wear safety glasses — tile fragments are razor sharp. This is dusty, noisy work. Budget 1-2 hours per wall.
• Tile over the top — possible if the existing tiles are firmly bonded and the wall is flat. You’ll need to score the old tile surface with an angle grinder and use a flexible adhesive. I only recommend this for small areas or temporary fixes — it adds weight and thickness to the wall.

After removing old tiles, scrape off any remaining adhesive with a wide scraper or an SDS chisel attachment on a drill. The wall needs to be reasonably flat — small bumps and dips are fine (adhesive will fill them), but anything over 3mm should be levelled with a skim of bonding plaster.

Boarding — Do You Need Tile Backer Board?

If you’re tiling in a shower enclosure or directly around a bath, standard plasterboard is not suitable. It absorbs water, softens, and eventually your tiles will come away from the wall.

You need either:

• Cement backer board (e.g., Hardiebacker, No More Ply) — screwed directly to the studs or over existing plasterboard. Completely waterproof and rigid. This is the gold standard for shower areas.
• Moisture-resistant plasterboard (green board) — better than standard plasterboard but not waterproof. Fine for walls that get occasional splashes but not for inside a shower enclosure.

Tanking Wet Areas

Tanking means applying a waterproof membrane to the wall before tiling. In any area that gets directly wet (inside a shower, around a bath), tanking is essential — even over backer board.

Liquid tanking kits are straightforward to apply: two coats of liquid membrane painted on with a roller, with reinforcing tape on the corners and joints. Let each coat dry for at least 2 hours. The whole process takes half a day including drying time.

Don’t skip tanking in wet areas. I’ve seen bathrooms where someone tiled directly onto plasterboard in a shower, and within 18 months the wall behind was rotten and black with mould. Fixing it costs ten times more than tanking would have.

Tools and Materials

Here’s everything you’ll need, roughly in order of use:

On adhesive: For bathroom walls, use a flexible, waterproof tile adhesive. Ready-mixed is easier for beginners (just open and spread), but powder adhesive mixed with water is cheaper per square metre and gives a stronger bond. For your first project, ready-mixed is fine — one less thing to worry about.

Setting Out Your First Row (The Most Important Step)

This is where beginners either set themselves up for success or create a headache that compounds with every row.

Rule #1: Never start from the floor or the bottom of the bath. Floors and bath rims are almost never level. If you start your first row from the bath rim, every row above will follow that unevenness.

Instead:

1. Measure the height of your tile plus one spacer gap.
2. Mark that measurement up from the lowest point of where the tiles will meet the bath or floor.
3. Draw a perfectly level line at that height across the wall (use your spirit level or laser level).
4. Screw a temporary batten (a straight piece of timber) to the wall along that line. This supports your second row of tiles while the adhesive sets.
5. Start tiling from this batten upwards. Once the upper rows are set (24 hours), remove the batten and cut the bottom row of tiles to fit the gap. This way, any uneven cuts are hidden behind the bath or at floor level.

Rule #2: Centre your tiles on the most visible wall. Dry-lay a row of tiles along the wall (on the floor, against a straight edge) to work out the starting position. You want to avoid tiny slivers of tile at the edges — they look terrible and are hard to cut. Ideally, the cut tiles at each end should be at least half a tile wide.

Applying Adhesive and Placing Tiles

Now the satisfying part begins.

1. Spread adhesive onto the wall with the flat side of your notched trowel, covering about 1 square metre at a time. Don’t do more than that — the adhesive starts to skin over after 15-20 minutes.
2. Comb through with the notched side, holding the trowel at roughly 45 degrees. This creates even ridges that compress when you press the tile on, giving full contact.
3. Press the tile firmly into the adhesive with a slight twisting motion. Check it’s level and flat with your spirit level — both horizontally and compared to neighbouring tiles.
4. Push spacers in between tiles (at least two per edge). These keep your grout lines consistent.
5. Wipe any adhesive off the tile face immediately. It’s easy to remove when wet, a nightmare when dry.
6. Work your way along the row, then start the next row above.

Key tips:

• If a tile isn’t sitting flat, pull it off, add more adhesive, and reapply. Don’t try to push a high corner down — you’ll create a lip.
• Every few tiles, hold your spirit level across multiple tiles to check they’re in the same plane. Catching a tile that’s sitting proud early is much easier than fixing it once the adhesive has gone off.
• Keep a damp cloth handy for wiping your hands and the trowel. Dried adhesive on your tools makes everything harder.

Cutting Tiles

Straight Cuts with a Manual Cutter

A manual tile cutter scores and snaps the tile along a straight line. For standard ceramic wall tiles, it works beautifully:

1. Mark your cut line on the tile with a pencil.
2. Place the tile in the cutter, aligning the line with the scoring wheel.
3. Score once with firm, even pressure — one pass only. Multiple passes create a rough edge.
4. Push down on the breaking arms to snap the tile along the score line.

For porcelain tiles, you’ll need a heavier-duty cutter or a wet tile saw. Porcelain is much harder than ceramic and cheap cutters struggle with it.

L-Cuts and Curves with a Grinder

Manual cutters only do straight lines. For L-shaped cuts (around windows, pipe boxes) and curves (around pipes), you need an angle grinder with a diamond cutting disc.

Safety is critical here: wear safety glasses, ear protection, and a dust mask. Tile dust is extremely fine and unpleasant to breathe. Work outside or in a well-ventilated area if possible.

For pipe holes, you can use a diamond hole saw attachment on a drill. Mark the centre, drill slowly with water as a lubricant, and let the tool do the work — don’t force it.

Grouting

Wait at least 24 hours after tiling before grouting. The adhesive needs to be fully set.

1. Remove all spacers. Pull them out with pliers or a flathead screwdriver.
2. Mix your grout to the consistency of thick peanut butter (for powder grout). Ready-mixed grout is fine for small areas.
3. Work the grout into the joints with a grout float, held at a 45-degree angle. Push it firmly in both directions to fill the gaps completely.
4. Scrape off the excess by holding the float almost flat to the tile surface and dragging diagonally across the joints.
5. Wait 15-20 minutes until the grout starts to firm up, then wipe the tile faces with a damp (not wet) sponge. Rinse the sponge frequently.
6. Polish off the haze the next day with a dry cloth.

Use anti-mould grout in bathrooms. Standard grout will go grey or black within months in a damp bathroom. Anti-mould grout costs a couple of pounds more and stays clean much longer.

Sealing with Silicone

Where tiles meet the bath, shower tray, worktop, or floor, use silicone sealant — not grout. Grout is rigid and will crack where two surfaces meet (because they move independently). Silicone flexes.

For a neat silicone line:

1. Apply masking tape either side of the joint, leaving a gap the width you want the silicone bead.
2. Cut the silicone nozzle at a 45-degree angle — small opening first; you can always cut more off.
3. Run a continuous bead along the joint.
4. Smooth immediately with a wet finger or a silicone finishing tool.
5. Peel the masking tape off while the silicone is still wet.

Use sanitary-grade silicone for bathrooms — it contains anti-mould agents. Standard silicone will go black within months.

Recommended Tiling Kit for Beginners

If I were starting from scratch today, here’s what I’d buy for a first bathroom tiling project:

• Manual tile cutter (600mm capacity) — handles most wall tiles up to 600mm. A solid mid-range cutter will last years of DIY projects.
• 6mm notched trowel — right size for standard wall tiles up to 300mm × 600mm. Go to 10mm for larger tiles.
• Flexible waterproof adhesive (ready-mixed) — easier for beginners, no mixing required.
• Anti-mould grout — essential for any bathroom. White or a colour that matches your tiles.
• Sanitary silicone — for all joints where tiles meet baths, shower trays, or worktops.
• Tile spacers (3mm) — a 3mm gap is forgiving for beginners and looks clean.
• Spirit level (1200mm) — or a laser level if the budget allows. Either works; the laser is just faster.

Total budget for tools and materials (excluding tiles): roughly £100-150. Compare that to the £500-1,000+ a tiler would charge for a standard bathroom, and you can see why this is one of the best DIY skills to learn. The tools pay for themselves on the first job.