What you'll need
Never paint over damp walls — it will peel within weeks. Fix the damp source first and allow full drying time.
Step-by-step guide
- Prepare the roomMove furniture to the centre or out entirely. Lay dust sheets. Remove switch plates and socket covers. The paint will go on everything — protect everything you don't want painted.
- Clean the wallsWash walls with sugar soap solution — this removes grease, dust, and nicotine that prevent paint adhering. Rinse with clean water and let dry fully. Skipping this is the most common cause of patchy, peeling paint.
- Fill holes and cracksPress filler into any holes or cracks with a filling knife. Leave proud of the surface — it shrinks as it dries. Sand flush once dry (usually 2 hours). Wipe dust away with a damp cloth.
- Sand and prime bare patchesAny bare plaster, filler, or new plasterboard needs a coat of watered-down emulsion (PVA primer) first. Bare surfaces are porous and suck paint in unevenly, causing patchy results.
- Apply masking tapeRun masking tape along skirting boards, door frames, and window reveals. Press the edge firmly down with a credit card for a clean line. Don't leave tape on for more than 24 hours.
- Cut in firstUse your 2-inch angled brush to paint a 3-4 inch band around all edges — ceiling line, corners, skirting, door frames. This is called cutting in. Do ceiling edges on the ceiling colour and wall edges on the wall colour.
- Roll the main wallsLoad the roller, roll off excess on the tray's ridged section, then apply in a W pattern starting from the top. Work in sections and maintain a wet edge — don't let one section dry before rolling into it.
- Second coatLet the first coat dry completely (minimum 2 hours, ideally 4). Lightly sand any nibs or runs with 180 grit. Apply second coat. Two thin coats always beat one thick coat.
Decorators always use a 'cutting in' technique and never use masking tape for edges — the brush control comes with practice but using the angled brush correctly gives a far cleaner result than tape.
Expert tips for the best result
- Quality brushes and rollers matter — cheap foam rollers leave stipple marks and shed fibres into the paint
- The angled brush is the single most useful painting tool — it gives a clean line without tape on experienced hands
- Remove masking tape at 45 degrees while the paint is still slightly tacky — fully dry paint tears
- Stir paint from the bottom, not just the top — pigment settles
- Work from natural light — stand back every few minutes to check for missed areas
Useful tools and products
When to call a professional painter decorator
If walls have significant damp damage, if there's artex or textured coatings to deal with (especially pre-2000 Artex which may contain asbestos), or if you want a flawless high-gloss finish on woodwork.
We connect you with vetted local painter decorators across the UK — fast response, free quotes, guaranteed work.
💬 Get a free quote via WhatsAppFrequently asked questions
How difficult is how to paint a room professionally for a beginner?
This guide is rated Easy. The difference between a DIY paint job that looks amateur and one that looks professional isn't expensive paint or special equipment — it's preparation. Decorators spend 60% of their time preparing su If you're not confident, a professional painter decorator can do this quickly and provide a guarantee on the work.
How long does how to paint a room professionally take?
Allow 1-2 days. This assumes the tools and materials are ready before you start. First-timers should budget extra time for preparation and any unexpected issues.
How much does a painter decorator charge for this in the UK?
Most painter decorators charge £40-80 per hour depending on location and complexity. For a straightforward job like this, expect 1-2 hours of labour plus materials. Get a fixed quote via WhatsApp — message us with your postcode and job details.
How do I find a reliable painter decorator near me?
WhatsApp us with your postcode and job description. We match you with a vetted local painter decorator from our network — most jobs get a response within the hour. Contact us here.