Painting Over Tiles in London Kitchens and Bathrooms

Is Painting Over Tiles Worth It?

Painting over tiles is one of the most frequently asked-about services we get enquiries for, and it's also one of the areas where we have to be most honest with clients. The question is not simply "can you do it?" — the answer to that is broadly yes. The more useful questions are: how long will it last, what preparation is required, and is there a scenario where a tile refresh through painting makes more sense than re-tiling?

The honest answer to all of these is nuanced. Tile painting, done properly with the right products and thorough preparation, can give a genuinely good result that lasts four to seven years in a bathroom and somewhat less in a kitchen splashback area with heavy daily use. Done poorly — wrong primer, inadequate prep, wrong topcoat — it will start failing within months.

This guide covers what good tile painting actually involves.

Why Tiles Are Difficult to Paint

The challenge with ceramic and porcelain tiles is adhesion. Glazed tiles have an extremely smooth, hard, non-porous surface — which is exactly what makes them practical in wet environments. It is also what makes them resist paint. Standard emulsions and even many primers will not achieve sufficient adhesion to a glazed tile surface without mechanical or chemical preparation.

Grout lines present an additional challenge. Grout is porous, often stained, and at a different level to the tile surface. A paint finish over tiles will bridge the grout lines, creating a uniform surface, but the coating over the grout is under different stresses from the coating over the tile face. Any differential movement — and there is always some as temperature and humidity change in a bathroom or kitchen — puts stress on the paint film at the grout line junction.

Preparation: The Critical Stage

Preparation for tile painting is the most time-consuming part of the job and the part that most home DIY attempts skip or rush. These are the steps that cannot be abbreviated:

Cleaning and degreasing. Kitchen tiles accumulate grease. Even tiles that look clean have a layer of vaporised cooking oil on the surface that will prevent any primer from achieving proper adhesion. We clean tile surfaces with a dedicated alkaline degreaser — a product specifically formulated to cut through baked-on grease — then degrease again with isopropyl alcohol or a specialist tack cloth to leave a perfectly clean, contaminant-free surface.

Grout assessment and repair. Failed or missing grout needs to be repaired before painting. Loose or cracked grout should be raked out and re-pointed. There is no point painting over compromised grout — the paint will fail at those joints and moisture will continue to penetrate behind the tiles.

Light abrading. Many tile paint systems recommend light sanding of the tile surface to provide a mechanical key for the primer. This is done with fine-grit wet-and-dry paper (240–400 grit) or a fine scotch-brite pad. The aim is to dull the glaze slightly without removing it. In confined spaces like shower enclosures, this is careful, slow work.

Priming. A specialist tile primer is non-negotiable. Standard primers will not adhere adequately to a glazed ceramic surface. The primers we use for tile painting are specifically formulated adhesion promoters — solvent-based or highly reactive water-based chemistries that achieve a genuine molecular bond with the glaze. Zinsser Bulls Eye 1-2-3 has good adhesion, but for the most demanding tile applications we use a dedicated tile and glass primer that provides a stronger bond.

Product Selection for the Topcoat

The topcoat matters enormously. Standard emulsion on tiles — even over a good primer — will not survive. You need a finish that is hard, washable, and moisture-resistant.

Specialist tile paints from manufacturers like Ronseal, Rust-Oleum, and Tile Doctor are formulated specifically for this application. They cure to a hard, wipeable film and include moisture resistance. They are available in a limited colour range but can be tinted to a wider palette in some cases.

Two-component polyurethane enamels are a step up in durability. These products mix a base coat with a hardener immediately before application, and they cure to a genuinely hard film that is resistant to cleaning chemicals, moisture, and light abrasion. We specify two-pack products for kitchen splashbacks where the paint surface will be in regular contact with water, cooking splash, and cleaning products.

Acrylic satin and semi-gloss enamels with high washability ratings — such as Dulux Trade Satinwood or equivalent — can perform adequately over a properly primed tile surface in lower-risk applications (a bathroom wall, for example, rather than a shower enclosure or splashback immediately behind a hob). These products are more widely available and easier to match to specific colour schemes.

Where Tile Painting Works Well

The applications where painted tiles give the best results and the longest service life are:

Feature wall tiles — tiles on a single feature wall in a bathroom that see minimal water splash and no direct shower spray. These can achieve excellent results and longevity.

Dated but intact splashbacks in a kitchen that is otherwise being refreshed rather than replaced. A properly painted splashback can transform the character of a kitchen at a fraction of the cost of new tiles.

Period-appropriate tile patterns where the aim is to refresh the colour of the tiles without changing their format or texture. Many Victorian and Edwardian encaustic tile patterns are beautiful but their colours have faded; a careful repaint can restore their appearance.

Where Tile Painting Has Limitations

Shower enclosures are the most challenging application. Tiles in a shower are subject to daily soaking, temperature cycling, and cleaning with shower products. Even the best tile painting system will struggle to achieve a long service life in a heavily used shower. We advise clients with shower enclosures to consider proper re-tiling as the more reliable long-term solution.

Floors. Tile painting on floors is generally inadvisable. Floor tiles are subject to abrasion, impact, and the stresses of footfall and furniture movement. Any paint film on a floor tile will wear relatively quickly.

Contact us if you are considering tile painting in your London property and would like honest advice on whether it is the right solution for your specific situation.