Old bathroom tiles still sound but ugly: can you avoid demolition?

How to tell whether the tiles are actually sound

Before considering any of the shortcut options, check the tiles are genuinely fixed to the wall. Tap each one with a knuckle or the handle of a screwdriver: a solid tile gives a dull, tight knock, while a hollow or ringing sound means the adhesive underneath has failed. A few isolated hollow tiles can sometimes be re-glued, but if a whole wall sounds hollow, the substrate has let go and no amount of surface work will fix that.

Also check the corners and the shower area for movement, and look behind any loose sections if you can get at them: damp plasterboard, black mould, or crumbling render behind the tile means there is a moisture problem, not just a cosmetic one. This is the point where the answer is often no longer «which coating» but «which contractor», and it is worth having someone look before spending money on paint or a fresh layer of tile.

Tiling over the existing tile

Tiling directly onto sound old tile is a recognised method, provided the surface is properly prepared: degreased, lightly ground or scored so the new adhesive has something to grip, and checked for level. A flexible, high-bond tile adhesive is used rather than a standard one, since it has to hold onto a glazed, non-absorbent surface rather than plaster or concrete.

The trade-off is thickness. The new layer adds roughly 1–1.5 centimetres all round, which shifts door thresholds, skirting lines, and the position of sockets, mixer taps, and the shower drain. In a small bathroom this can mean a fitter has to extend tap spindles or reset a floor drain, which adds cost. It works best on larger, flatter walls, and less well around a shower tray or where fixtures are already tight to the wall.

This is one of the more common jobs we are called out for, and pricing depends entirely on wall area and how much has to be adjusted around fittings — worth getting a fixed quote once the room has been measured and the fixtures assessed.

Tile paint: the fastest but shortest-lived fix

Two-component epoxy tile paint is the quickest way to change how a bathroom looks: clean and degrease the tiles, apply, and within a few days you have a new colour. It suits a landlord refreshing a rental between tenants, or someone who wants the room to look presentable for a year or two without committing money to it.

It is genuinely a stopgap. Epoxy paint sits on the glaze rather than bonding into it, so it chips at corners, wears thin around taps and the shower area, and does not tolerate being scrubbed hard. It also does nothing for grout lines, which usually need addressing separately, and it will not fix any of the substrate issues described above — it only ever restarts the clock on how the surface looks.

Redoing just the grout and fittings

If the tiles themselves are fine and it is really the grout that has aged — gone grey, developed mould in the shower recess, or crumbled at the edges — this is often the most sensible fix on its own. Old grout is raked out with a grout saw or oscillating tool, the joints are cleaned, and new grout is applied, ideally with an epoxy or mould-resistant grout in wet areas.

At the same time it is worth replacing the silicone seal around the bath, shower tray, and any corner joints, since that is usually where black mould actually lives, not in the grout itself. Swapping a dated tap, showerhead, or towel rail at the same time changes how the room reads far more than the tile colour does.

This is a modest job in terms of hours, and it is one where doing it properly — full removal of old material rather than grouting over the top — matters more than doing it fast.

• Rake out old grout fully; do not grout over existing joints
• Use mould-resistant or epoxy grout in the shower and bath surround
• Replace silicone seals at the bath, tray, and corner joints
• Check for soft or damp substrate before regrouting a whole wall
• Consider swapping the tap or showerhead while the wall is being worked on

When covering over just delays the real job

Any of these options is a genuine fix only when the wall behind the tile is dry, solid, and structurally fine. If the hollow-tap test reveals a large loose area, if there is visible damp staining, or if the bathroom is over twenty or thirty years old with the original waterproofing membrane, tiling over or painting the surface is decoration on top of a problem that is still developing underneath.

The giveaway is usually smell or recurring mould that comes back within weeks of cleaning, even after fresh grout and silicone. That points to moisture getting behind the tile through a failed membrane or a leaking connection, not a surface issue, and no coating will stop it. In that case the honest advice is to plan for a proper renovation rather than spend money twice.

Deciding which option actually makes sense

Match the option to what you actually found when checking the tiles. Sound tiles with dated grout and fittings: regrout and move on. Sound tiles with a colour you dislike and a flat enough wall: tiling over is worth a quote. Sound tiles you just need to survive another year or two cheaply: paint, with eyes open about how long it lasts.

Hollow tiles across a whole wall, damp behind the tile, or a bathroom old enough that the waterproofing itself is due for renewal: none of the shortcuts solve that, and a full bathroom renovation is the honest answer, priced from 3500 € depending on size and fittings. We are happy to look at a bathroom in Tallinn or Harju county and say plainly which category it falls into before any work starts.