How Much Paint May You Need?
For a 5m x 4m en-suite using Matt Emulsion, you'll likely need around 6.7 litres of paint to cover approximately 40.2m² of paintable wall area with 2 coats. Since this is a wet area, choosing a moisture-resistant paint is essential to prevent peeling and mould growth. Standard emulsion may not hold up in the damp conditions found in a en-suite, so look for paints specifically formulated for bathrooms and kitchens that contain anti-mould additives. This guide covers the key steps to paint your en-suite walls with a professional finish.
Preparing Your En-suite for Painting
Good preparation is the key to a long-lasting paint finish. In a en-suite, check carefully for any signs of mould or mildew before painting. Treat affected areas with a fungicidal wash and allow to dry completely. Any flaking paint should be scraped back to a sound surface, and bare plaster must be sealed with a mist coat before applying your topcoats. Use masking tape along skirting boards, window frames, and door frames to achieve crisp, clean edges. Remove switch plates and socket covers where possible for the neatest result. If painting over a dark colour, apply a coat of white primer first to prevent the old colour bleeding through.
Choosing the Right Paint for Your En-suite
Your chosen Matt Emulsion finish will cover approximately 40.2m² of wall space in your 5m x 4m en-suite. For a en-suite, choose a moisture-resistant paint with anti-mould properties. Dulux Bathroom+, Crown Kitchen & Bathroom, and Johnstone's Kitchen & Bathroom paint are all formulated to withstand the high humidity levels found in wet rooms. These paints contain fungicides that help prevent mould and mildew from forming on the painted surface. Always check the tin label for the manufacturer's recommended coverage rate, as this can vary between brands and colours. Darker colours typically require an extra coat for full opacity.
How to Apply Matt Emulsion
Start by cutting in around the edges of your en-suite with a 2-inch angled brush, painting a strip approximately 50mm wide along ceilings, corners, skirting boards, and around window and door frames. Then use a medium-pile roller to fill in the main wall areas, working in W-shaped strokes to distribute the paint evenly before finishing with straight, overlapping vertical strokes. Two coats are the standard recommendation for most walls. Apply the first coat and allow it to dry fully before applying the second. The first coat seals the surface and the second provides the depth of colour and consistent finish. Work on one wall at a time to maintain a wet edge and avoid visible lap marks where sections of paint overlap.
Paint Coverage Tips
For your 40.2m² en-suite, you'll likely need around 6.7 litres of Matt Emulsion across 2 coats. Matt emulsion typically covers around 12m² per litre on smooth, sealed surfaces. On textured walls such as Artex or woodchip, coverage can drop to 8-10m² per litre due to the increased surface area. New plaster is particularly absorbent and will require a diluted mist coat first. Always stir the paint thoroughly before use and between tins to ensure consistent colour. If you need multiple tins of the same colour, mix them together in a large bucket (a process called boxing) to eliminate any slight batch variations.
Drying Times for Matt Emulsion
Drying times depend on temperature, humidity, and ventilation in your en-suite. Matt emulsion is typically touch-dry within 1-2 hours and can be recoated after 4 hours in good conditions. In cooler or humid rooms, allow longer drying time. Avoid painting if the room temperature is below 10°C, as the paint may not cure properly. Ensure good ventilation by opening windows where possible. Do not rush between coats; applying a second coat before the first has fully dried can cause the paint to peel, bubble, or develop a patchy finish. In winter or damp weather, using a dehumidifier can speed up drying times significantly.
Estimated Cost
Paint prices in the UK vary considerably depending on the brand and quality. For your 40.2m² en-suite requiring approximately 6.7 litres of Matt Emulsion, budget options like Dulux Simply Refresh or own-brand paints cost around £15-22 per 5L tin (£30-44), mid-range choices such as Dulux Easycare or Crown Breatheasy run £22-35 per 5L tin (£44-70), and premium brands like Farrow & Ball or Little Greene cost £25-45 per 2.5L tin (£75-135). Budget around £20 for sundries including rollers, brushes, masking tape, and dust sheets if you do not already have them. In total, you might expect to spend between £50 and £155 depending on your paint choice.