How Professional Painters Prepare a Room in London Homes

Preparation Is Where the Quality Lives

Ask any experienced decorator what separates a good paint job from a poor one and the answer is always the same: preparation. The actual painting — rolling walls, cutting in edges, glossing woodwork — is the visible part of the process, but it accounts for less than half the time on a professional job. The rest is preparation, and it is where the real skill lies.

In London homes, where period features, high expectations and valuable finishes are the norm, thorough preparation is non-negotiable. Here is the sequence our team follows on every project from Belgravia to Richmond.

Step One: Room Assessment

Before any dust sheets come out, a professional decorator assesses the room. This means checking:

• Wall and ceiling condition — cracks, damp patches, flaking paint, loose plaster and previous poor repairs all need identifying.
• Woodwork condition — are skirting boards, architraves, doors and window frames sound, or do they need filling, sanding or partial replacement?
• Surface types — different substrates need different preparation. New plaster, old distemper, previously wallpapered surfaces and bare timber all require distinct approaches.
• Access requirements — high ceilings in Georgian properties across Westminster and Marylebone may need scaffold towers rather than standard stepladders.

This assessment determines the preparation plan and ensures nothing is missed once work begins.

Step Two: Room Protection

Professional protection goes well beyond throwing a sheet over the sofa:

• All furniture is moved to the centre of the room or removed entirely.
• Canvas dust sheets cover every surface — furniture, floors and any fixed items like radiators.
• Light switches, sockets and door furniture are masked with low-tack tape.
• Carpet edges are protected with specialist tape to prevent paint seeping underneath skirting boards.
• Light fittings are bagged in polythene.

In homes across Knightsbridge, Mayfair and Chelsea, where furnishings and flooring are particularly valuable, we take extra care with protection — it is built into our standard process, not an add-on.

Step Three: Surface Cleaning

Paint does not adhere well to dirty surfaces. Every surface to be painted is cleaned before any further preparation:

• Walls and ceilings are wiped down to remove dust, cobwebs and surface grime. Kitchens get a sugar soap wash to cut through grease. Nicotine-stained surfaces may need a specialist cleaner.
• Woodwork is cleaned with sugar soap solution, paying particular attention to door handles, light switch surrounds and skirting board tops where dirt accumulates.
• Mould is treated with a fungicidal wash and allowed to dry before painting. Simply painting over mould guarantees it will return.

Step Four: Repair and Filling

This is often the most time-consuming stage, especially in older London properties:

• Cracks in plaster are raked out to a V-shape, dampened and filled with appropriate filler. Hairline cracks use flexible filler; larger structural cracks may need tape and jointing compound.
• Holes from picture hooks, rawlplugs and general wear are filled, allowed to dry and sanded smooth.
• Damaged woodwork — chipped edges on skirting boards, dented architraves and cracked window sills are filled with two-pack wood filler, shaped and sanded.
• Loose or blown plaster is cut back to a sound edge and patched. In Victorian and Edwardian homes across Clapham, Fulham and Islington, lath-and-plaster walls frequently need localised repairs.

Every filled area is sanded flush with the surrounding surface. Running your hand across a wall should reveal no ridges or dips.

Step Five: Sanding

Sanding creates a key — a slightly roughened surface that paint grips onto:

• Previously painted walls get a light sand with 120-grit paper to remove nibs and create adhesion.
• Woodwork is sanded more thoroughly. Glossy surfaces are keyed with 180-grit paper. Flaking paint is scraped and feathered so edges are invisible under the new finish.
• Between coats — professional decorators sand lightly between each coat of paint on woodwork. This removes dust particles trapped in the wet paint and ensures a glass-smooth final finish.

Step Six: Dust Control

Sanding creates dust, and dust is the enemy of a clean paint finish:

• All sanding dust is vacuumed up with a HEPA-filtered vacuum, not just swept with a brush.
• Surfaces are wiped with a tack cloth — a slightly sticky cloth that picks up fine particles.
• The room is left to settle for at least 30 minutes after major sanding before any painting begins.

In London properties where dust control is particularly important — homes with sensitive electronics, allergy sufferers or expensive soft furnishings in adjacent rooms — we use dustless sanding systems that extract dust at source.

Step Seven: Priming

The right primer ensures the topcoat performs as intended:

• Bare plaster gets a mist coat — matt emulsion diluted with water — that soaks into the surface and provides a stable base.
• Bare timber is primed with a dedicated wood primer that seals the grain and prevents tannin bleed.
• Stained areas — water marks, nicotine stains and old damp patches are sealed with a stain-blocking primer like Zinsser B-I-N.
• Previously dark colours being painted over in a lighter shade benefit from a tinted primer to reduce the number of topcoats needed.

Step Eight: Masking

The final preparation step before painting:

• Masking tape is applied along edges where two colours or finishes meet — typically where walls meet ceilings, around window glass and along the top of skirting boards.
• Professional decorators use high-quality low-tack tape that removes cleanly without pulling paint off underlying surfaces. Cheap tape leaves adhesive residue or lifts fresh paint when removed.

The Professional Difference

Proper preparation is invisible in the finished result — and that is exactly the point. When walls look perfectly smooth, edges are crisp and woodwork gleams without a single brush mark, it is because hours of careful preparation made the painting stage straightforward.

We prepare every room to the same exacting standard across all 21 London areas we serve. If you want a finish that lasts, contact us for a free quote.