Wall tiling is less forgiving than floor work in one specific way: gravity. Everything you fix is trying to slide down the wall until the adhesive grabs, which makes preparation, planning, and the first row's position decisions that echo through the entire installation.
This guide walks wall tiling step by step: surface preparation, the batten-and-setting-out that keeps rows level around problem corners, adhesive application on vertical surfaces, tile placement and spacing, cutting around sockets and fittings, and the grouting stage that turns individual tiles into a finished surface. Follow the sequence and walls finish flat, aligned, and permanent.
Wall tiling failures trace to the surface more often than to the tiles. Unlike a floor, a wall is judged at eye level, and its preparation defects are the first things seen.
Assess the existing surface. Plaster must be sound, no hollow areas under the knuckle-tap, no crumbling or dusty patches, no fresh skim still holding moisture (allow new plaster to cure a full week minimum, ideally longer in humid seasons). Painted walls are a risk category of their own: sound, well-bonded matte emulsion can be tiled over after degreasing, but flaking, glossy, or unknown coatings must be stripped or mechanically keyed, because adhesive bonds to the paint, and the paint may not bond to the wall. A tiled wall that peels off in sheets was usually a paint problem disguised as a tile problem.
Make it flat and true. Hold a 1–2 m straightedge across the wall vertically and horizontally: gaps over 3–4 mm per metre telegraph as lippage once tiles are on. Small hollows fill with a thin coat of repair mortar; proud areas grind down or get floated over. Corners should be checked for plumb with a level, a wall that leans 10 mm over its height pushes the tile field out of parallel with the floor, and the cut line at the top drifts.
Clean and prime. Degrease around kitchens (cooking oil films defeat adhesive), dust the whole surface, and apply a primer where the adhesive data sheet calls for one, especially on absorbent blockwork and repair patches. The wall should end the preparation stage as something adhesive wants to stick to.
Wall setting-out answers two questions before any adhesive is mixed: where do the horizontal rows sit vertically, and where does the tile grid sit horizontally?
Find the row position first. The temptation is to start tiling from the floor upward, the floor is there, it looks like a natural batten. But the floor is rarely level, and rows started on it will drift with every undulation. The professional method starts the second row from the bottom:
The batten is what makes wall tiling forgiving: tiles rest on it in the early hours instead of sliding, and the first row above it is level by construction, not by luck.
Find the grid position horizontally. The same logic applies left-to-right. Measure the wall width, count the tile columns, and centre the field so cuts at both ends are balanced halves, or, where the wall has a dominant feature (a window, a mirror, a cooker splashback), centre the grid on that feature and let the room corners absorb the cuts. On walls with external corners that wrap around, plan so that the corner takes a cut tile on the least seen side and the visible side keeps its factory edge, external corners are the highest-wear, highest-visibility line in any wall installation.
Plot the obstacles. Sockets, switches, pipes, and window reveals all land somewhere in the grid. Mark their positions on the wall in the setting-out stage and check which rows and columns they intersect, an obstacle that can be moved to a joint line with one centimetre of repositioning saves a morning of awkward cutting. On the electrical side, this is also the moment to confirm socket boxes sit proud of the plaster at the correct depth for tiling, not buried behind it.
Wall adhesive work differs from floor work in its physics, gravity pulls the ribs down, and in its economics: walls use less adhesive, but waste proportionally more of it on the floor.
Choose the right grade. A quality flexible (C1/C2) wall adhesive handles most tiles and all modern requirements; for dense porcelain or large wall formats, match the adhesive to the tile explicitly. Non-slip formulations, often labelled "wall grade" or "no-sag", hold tile position on vertical surfaces without the tile creeping down the wall. In wet areas, the same flexible grade bonds over the waterproofing membrane; the membrane-to-adhesive compatibility note in our waterproofing guide governs that pairing.
Mix smaller than you think. A wall uses perhaps a kilo of adhesive per half-square-metre, mixing floor-sized batches leads to adhesive standing past its pot life while you work a small area. Mix for 10–15 minutes of work, discard anything that has skinned, and in hot conditions work in the shaded hours of the morning.
Spread upward, in bands. Using the notch the tile size calls for (6 mm for standard 200–300 mm wall tiles, 8 mm for larger formats), spread a band of adhesive roughly one tile-width-plus-one high and two to three tiles wide. Comb in vertical strokes on walls, vertical ribs collapse without trapping air pockets behind the tile and let any trapped air escape upward. Horizontal ribs on a wall can seal a pocket of air mid-tile, which becomes a hollow spot.
Beat the skin. If the combed band develops a dull surface while you are still laying, scrape it off and re-comb fresh. On hot afternoons this can happen within ten minutes; the professional response is smaller bands, not harder pressing.
Place from the batten upward. Each tile is placed onto the ribs, pressed home with the palm, and given the small slide-and-return motion to collapse the ribs, then checked against its neighbours with a small level across the face and a straightedge across the joint line. The batten holds the row while you work; spacers hold the grid.
Support the heavy and the awkward. Large-format wall tiles benefit from a temporary support batten at the base plus occasional tile-support props if the adhesive's grab is slow; anything over 600 mm on a wall deserves them until the adhesive takes initial set. If a tile slowly creeps despite good technique, the adhesive is wrong for the format, not the technique wrong for the adhesive.
Keep joints clean, faces clean. Rake adhesive squeeze-out from joints before it cures, and wipe faces immediately, cured adhesive film on polished tiles is a grinding job to remove. A damp sponge kept at hand makes this a five-second-per-tile habit instead of an end-of-day penance.
Around obstacles, measure in place. Sockets and pipes are cut in the field as the rows reach them: mark the tile in position (hold it over the gap, mark the cut-outs from the actual obstacle, not from the drawing), drill pipe holes with a diamond hole saw before any other cuts through that tile, and nibble or grinder-cut the socket boxes square. The cut-out tolerance around a socket face plate hides 2–3 mm, use it. Electrical accessories sit on the finished tile with extended screws; the plate should overlap the cut cleanly, not fight it.
Cut tiles go where the eye doesn't. The setting-out already decided where the cuts land; this stage executes it. Straight cuts score-and-snap; notches and reveals on the grinder with a diamond blade; every cut dry-fitted before buttering. At internal corners, measure each wall's out-of-plumb independently, two walls meeting out of square produce a different cut at the top than at the bottom, and only measuring the actual gap at the actual height catches it.
Give the wall its cure: 24 hours minimum before disturbing anything, and resist the temptation to grout the same day. Grouting too early traps the adhesive's drying moisture behind a rigid joint, the failure mechanics of that shortcut are laid out in our common tiling mistakes guide. Use the cure day to mix the next room's adhesive batch or cut the awkward trims.
Then grout by the book, the full selection, mixing, packing, and cleaning discipline is in our grout guide, and the wall-specific points are: work in sections top-down (grout runs downhill, so work with gravity, not against it), tool the joints slightly concave for shed-water geometry in wet areas, and keep the two-bucket clean going so the polished faces stay polished.
In wet areas, the final act is silicone, not grout: every junction where tile meets tile at an angle, tile meets floor, tile meets fixture, and tile meets penetration gets a flexible sanitary sealant, tooled smooth and left to cure its full period before water touches it. That single pass is the wall's real water management, working with the membrane behind the tiles.
External corners get a trim profile or a mitred factory edge, a raw cut edge on an external corner is a chipping hazard and a visible one. Metal or PVC corner trims are set into the adhesive bed at the corner tile stage (not added after), aligned with the tile faces, and grouted in.
Window reveals are their own small project: measure each return independently, watch that the sill piece falls toward the window for drainage, and keep the joint alignment wrapping the reveal so the grout line continues around the corner unbroken where possible.
The final clean, the next day, haze off with a dry microfibre or dedicated remover; the punch-list inspection after that, every tile rings solid, joints are full, corners are true, and the cuts at the room's edges match each other. Then, and only then, does the wall hand over.
For the wall that has to be right, the whole guide compresses to:
Wall tiling succeeds the way floor tiling does, by spending its patience early. The batten and the setting-out consume the morning and decide everything; the adhesive discipline consumes the afternoon and protects everything; the cure and grout stages ask nothing but time and reward it with a surface that outlasts several redecorations.
The gravity that makes walls unforgiving is also what makes them simple: physics punishes every shortcut immediately and visibly, which means a wall tiled by this sequence announces its quality at first glance and keeps proving it for decades. When you are ready to plan the quantities behind it, the tile calculator handles the room's arithmetic, and the cost blocks that buy that quality are laid out in our cost estimation guide.