Tile grout colour and type: how to choose

Cement-based grout — when it is enough

Cement-based grout is the standard choice for most homes: hallways, kitchen splashbacks, dry-ish bathroom walls above the shower area. It is cheaper, easier to apply, easier to redo, and comes in a wide range of ready-mixed colours from any building supplies shop.

Its weakness is porosity. It absorbs water and grease slowly, which is why it darkens over the years and why grout haze builds up in kitchens near the hob. Sealing it once it has cured helps, but sealant wears off and needs reapplying every year or two.

For a hallway floor, a kitchen splashback, or bathroom walls outside the direct spray zone, cement-based grout with a sealant is a sensible, ordinary choice. There is no need to pay epoxy prices for a wall that mostly stays dry.

Epoxy grout — where it is worth paying more

Epoxy grout costs noticeably more per pack and is harder to apply — it sets faster, needs cleaning off the tile face before it cures, and is less forgiving for a first attempt. It is not something most people should learn on a visible wall.

What you get for that is a grout that is essentially non-porous once cured. It does not absorb water, does not stain from grease or coffee, and needs no sealing, ever. In a shower enclosure, around a bath, or on a kitchen worktop splashback behind a hob, that is a real advantage over a working lifetime.

Epoxy is worth the extra cost in shower floors, shower walls, wet room floors, and any spot that gets soaked daily or splashed with oil. It is not worth it on a dry hallway floor where cement grout with sealant will do the job for less.

Which grout resists moisture and mould better in a wet room

Mould needs moisture and something to feed on. Cement grout's porosity gives mould both — it holds water in its pores and organic residue collects in the surface texture, especially in grout lines that stay damp between showers.

Epoxy grout resists mould far better simply because there is nothing for it to take hold in. Manufacturers also sell mould-resistant additives for cement grout, and they do help, but they slow the problem down rather than remove it — cement is still porous underneath.

In a genuinely wet area — the shower floor, the shower wall up to head height, a bath surround — epoxy is the grout that actually holds up over years rather than needing rework. Where the grout meets a bath, a shower tray, or a corner, that joint should be silicone rather than grout regardless of type, since grout cracks with the slight movement those joints get; that is a separate job we quote separately, from 45 € per job.

• Shower floor and shower wall: epoxy grout, silicone at the corners and edges
• Bath surround: epoxy grout where tiled, silicone where tile meets bath
• Kitchen splashback behind the hob: epoxy or a mould-resistant cement grout
• Hallway and dry-zone bathroom walls: ordinary cement grout with sealant
• Any external corner or movement joint: silicone, not grout, in any wet room

Grout colour — matching, contrasting, and what to avoid

Matching the grout to the tile colour, or close to it, makes a wall or floor read as one surface and hides small tile-cutting irregularities, which is useful with budget tiles or a first tiling attempt. It is the safer, more forgiving choice.

A contrasting grout — dark grout with light tiles, for instance — makes every joint visible and turns the tile pattern itself into the feature. It looks deliberate when the tiling is precise and even, and it looks messy when cuts are uneven, since every wobble in the line shows.

White and very light grout in a shower or around a bath is the colour most likely to disappoint: it shows soap scum, grout haze and early mould long before darker grout does, even when both are actually equally clean underneath. A mid-grey or beige in wet areas ages far better in appearance than white.

What grout advertising is not worth taking seriously

Packaging often promises grout that is permanently mould-proof or self-cleaning. No grout is either — mould resistance and stain resistance are real properties that vary between products, but they reduce the problem rather than remove the need for cleaning or ventilation.

Lifetime colour guarantees on cement-based grout should also be read carefully. Cement grout does lighten, darken or pick up staining over years in a wet area regardless of the additive; that is the nature of a porous material, not a manufacturing fault.

Treat the product description as a starting point, not a promise, and choose based on where the grout is going — dry or wet, high traffic or low — rather than the strongest claim on the box.

When tiling and grouting are best done as one job

Grout choice is really a tiling decision, since the two are chosen and applied together, and getting the grout wrong after the tiles are set is far more work than choosing correctly beforehand. It is worth deciding grout type and colour before the tiles go up, not after.

We do tiling jobs — bathrooms, kitchen splashbacks, hallway floors — from 35 € per job, and can advise on cement versus epoxy grout and colour for your specific tiles and room before work starts. For the joints around a bath, shower tray or corner, silicone sealing is quoted separately, from 45 € per job.

If you are retiling an existing wet room, it is usually more efficient to have tiling and the silicone finish done in the same visit than to book them separately later.