Kitchen & Bathroom Painting Guide: Moisture-Resistant Solutions That Last

Why Kitchens and Bathrooms Demand Different Paint

Kitchens and bathrooms are the most demanding environments for paint in any home. Steam, condensation, cooking grease, food splashes, cleaning products, and constant temperature fluctuations create conditions that standard emulsion simply cannot handle. Using normal wall paint in these rooms guarantees failure — peeling, mould, staining, and a finish that looks tired within 12 months. As professional painters in London, we specify specialist products for kitchens and bathrooms on every project. This guide explains exactly what works, what doesn't, and why.

The Kitchen Environment: Heat, Grease, and Constant Cleaning

Kitchens attack paint from multiple angles simultaneously:

• Grease aerosol: Cooking releases microscopic oil particles into the air that settle on every surface, including walls. Over months, this creates an invisible film that no standard paint can resist — new paint applied over greasy walls will fail to bond. Even after painting, the grease settles on the fresh paint surface, requiring regular cleaning that standard matt emulsion cannot withstand. This is why scrubbable paint is essential in kitchens.
• Steam and condensation: Boiling water, simmering sauces, and running hot taps generate steam that condenses on cooler wall surfaces. Repeated wetting and drying cycles break down standard emulsion binders, causing the paint to soften, blister, and eventually peel. Specialist kitchen paints are formulated with moisture-resistant binders that withstand repeated wetting.
• Heat cycling: The area around hobs, ovens, and radiators experiences significant temperature swings — from ambient to 40°C+ during cooking, then back down. Standard paint expands and contracts with temperature changes, eventually cracking. Heat-resistant formulations (not just any "kitchen paint") are needed for these areas.
• Physical contact: Kitchens are busy spaces — bags, coats, chairs, and bodies constantly brush against walls. The paint finish must be tough enough to withstand this physical wear without marking.

The Bathroom Environment: Humidity, Mould, and Splashes

Bathrooms present a different but equally challenging set of conditions:

• Extreme humidity: A shower or bath can raise bathroom humidity to 90–100% within minutes. Unless the room has excellent extraction, this moisture-laden air condenses on walls (particularly external and north-facing walls), ceilings, and around windows. Standard emulsion absorbs this moisture like a sponge, creating the perfect environment for mould growth. Specialist bathroom paint contains fungicides that actively inhibit mould and mildew.
• Condensation management: Even with an extractor fan, bathrooms experience regular condensation. The paint must be able to withstand water sitting on its surface without softening, blistering, or developing watermarks. This is a fundamentally different requirement from the moisture resistance needed in kitchens — bathroom paint must handle actual water contact, not just humidity.
• Direct water splashes: Areas around basins, baths, and showers receive direct water splashes. Above a bath with a shower, the wall zone is essentially in a wet environment — paint alone may not be sufficient here. Tiles, shower panels, or specialist wet-room finishes are recommended for direct splash zones. Paint is suitable for the upper walls and ceiling, away from direct water contact.
• Cleaning product exposure: Bathroom cleaning products — bleach sprays, limescale removers, abrasive cleaners — are far more aggressive than general household cleaners. Bathroom paint must be chemically resistant enough to withstand occasional contact with these products without discolouring or breaking down.

The Best Kitchen Paint Products

After testing and applying these products professionally:

• Dulux Trade Diamond Matt: Our primary recommendation for kitchen walls. It's a matt finish (so it hides wall imperfections) but is 10x tougher than standard Dulux Trade Vinyl Matt. Fully scrubbable — food splashes, grease marks, and scuffs wipe off with a damp cloth without affecting the finish. Available in the full Dulux Trade colour range (1,200+ colours including colour-matched Farrow & Ball and Little Greene colours). Approx £55–65 per 5L.
• Zinsser Perma-White: A self-priming, mould-resistant paint designed specifically for kitchens and bathrooms. Guaranteed to prevent mould growth for 5 years. Available in matt, satin, and semi-gloss. Tintable to a limited colour range. Excellent durability and moisture resistance. Approx £30–35 per 2.5L.
• Dulux Trade Bathroom+: Specifically formulated for high-humidity environments. Contains a fungicide that actively prevents mould. Available in soft sheen finish only — the slight sheen aids moisture resistance. Excellent for bathroom use, also suitable for kitchens. Approx £40–50 per 5L.
• Crown Trade Clean Extreme: A scrubbable, stain-resistant matt emulsion that's also suitable for kitchens. Slightly more budget-friendly than Diamond Matt. Good durability but less chemical resistance than the Dulux product. Approx £40–50 per 5L.

The Best Bathroom Paint Products

• Dulux Trade Bathroom+: Our standard recommendation for bathroom walls and ceilings. The soft sheen finish reflects light well in typically small London bathrooms and the fungicidal properties genuinely work — we rarely see mould issues in bathrooms painted with this product, provided there's adequate ventilation.
• Zinsser Perma-White: The 5-year mould guarantee makes this a compelling choice for bathrooms in older London properties where damp is a persistent issue. The matt version is preferred for ceilings (where a sheen finish can highlight every imperfection), while the satin version is preferred for walls.
• Dulux Trade Diamond Eggshell (for bathroom woodwork): Bathroom woodwork — skirting, door frames, window sills — needs maximum moisture resistance. Diamond Eggshell is water-based (no yellowing), extremely durable, and handles bathroom humidity without degrading.

Preparation for Kitchen and Bathroom Painting

Preparation is even more critical in kitchens and bathrooms than in other rooms:

• Kitchen walls — degreasing: Sugar soap alone may not be sufficient for kitchen walls. We use a specialist degreaser (Krud Kutter or similar) on walls near hobs and extractor fans where grease build-up is heaviest. The test: splash water on the wall. If it beads, there's grease present and the paint will not bond. Degrease until water sheets on the surface rather than beading.
• Mould treatment: Any existing mould must be treated before painting — paint cannot kill existing mould; it will grow through the new paint within weeks. Use a specialist mould-killing treatment (HG Mould Spray, Zinsser Mould Killer, or a diluted bleach solution). Allow to dry completely. For persistent mould problems, apply Zinsser B-I-N or Zinsser Bulls Eye 1-2-3 as a stain-blocking and sealing primer before the bathroom paint. This creates a barrier that prevents any remaining spores from growing through.
• Bathroom ventilation check: Before painting, confirm the extractor fan is working effectively. Hold a piece of toilet paper against the fan — it should hold the paper firmly in place. If the fan is weak or non-functional, improve ventilation before painting — no paint can compensate for a ventilation problem. A bathroom without adequate extraction will always develop mould, regardless of paint quality.
• Silicone sealant: Check all silicone around baths, basins, and showers. Replace any mouldy or deteriorating sealant before painting — it's a false economy to paint beautiful walls while ignoring the sealant that will spoil the overall appearance.
• Priming: For previously unpainted surfaces, bare plaster, or surfaces with stains, apply a coat of the appropriate primer before the specialist finish coat. Zinsser Bulls Eye 1-2-3 or a coat of the finish paint thinned by 10% with water both work well.

Beyond Paint: Tiles, Splashbacks, and Alternative Finishes

In some kitchen and bathroom situations, paint alone isn't the best solution:

• Kitchen splashbacks: The area directly behind a hob or worktop needs more than paint. Glass splashbacks, stainless steel panels, or tiles are recommended for these high-impact areas. Painting a splashback is a false economy — it will stain and fail within months.
• Bathroom wet zones: The area immediately around a bath or shower (the "wet zone" extending approximately 1 metre from the water source) should be tiled, paneled, or treated with a specialist wet-room system. Bathroom paint is suitable for the upper walls and ceiling but not for surfaces receiving direct, regular water contact.
• Ceilings: Kitchen and bathroom ceilings are particularly vulnerable — steam rises, and ceiling paint receives the most moisture exposure. Use the same specialist paint on the ceiling as the walls. Standard ceiling paint will not withstand bathroom humidity.
• Tile paint: Painting over existing tiles is possible using specialist tile paint (Ronseal One Coat Tile Paint, Rust-Oleum Tile Transformations) but it's a compromise, not a permanent solution. It will eventually wear, chip, and need redoing — usually within 2–3 years in high-use areas. Professional tile replacement or re-grouting often provides better long-term value despite the higher upfront cost.

Maintaining Painted Kitchens and Bathrooms

Even the best specialist paint needs proper care to maintain its appearance and performance:

• Wipe splashes immediately: Don't let cooking grease or bathroom products sit on painted surfaces — the longer they remain, the more likely they are to stain or damage the finish.
• Use gentle cleaners: A damp microfiber cloth with a small amount of mild detergent is sufficient for most marks. Avoid abrasive cleaners, bleach sprays, and scouring pads — they'll damage even scrubbable paint.
• Ventilate during and after cooking/showering: Run the extractor fan and open a window. Reducing humidity and airborne grease at source is far more effective than trying to clean it off the walls later.
• Inspect annually: Check for early signs of mould, peeling, or damage — early intervention prevents a small problem from becoming a full repaint. See our wall maintenance guide for detailed advice.

For a professional kitchen or bathroom painting specification tailored to your specific room — including ventilation assessment, product selection, and a detailed quote — get in touch with our team. We've painted kitchens and bathrooms across London and know exactly what works in every situation. Call 020 8088 3213.