Painting Textured Walls in London Homes: A Practical Guide
How to paint over textured wall surfaces in London properties — rendered finishes, sand texture, marmorino, and practical advice on achieving clean, even results.
Textured Walls and the Painting Challenge
Textured wall surfaces are everywhere in London's housing stock, but they are rarely talked about as a distinct category. The assumption is that painting is painting — the same techniques and products apply whatever the surface. In practice, textured surfaces require meaningfully different approaches, and the most common mistakes in decorating textured walls come from treating them exactly like smooth plaster.
This guide covers the main types of textured surface found in London homes, what makes each one different, and how to achieve a clean, even, professional-looking paint finish on each.
Types of Textured Surface
Sand textured plaster and render. The most common type of texture in London properties, particularly in the post-war and interwar housing stock. Sand finish plaster has a fine but consistent texture created by the aggregate in the mix. It is not rough in the way that Artex is rough, but it is not smooth either. Under raking light, the sand texture is clearly visible, and this affects the way paint builds on the surface.
Textured masonry and external render. External walls rendered with a sand/cement mix, or with proprietary through-coloured renders, present significant texture. The texture affects how much paint is needed to achieve adequate coverage and how the surface needs to be sealed before decoration.
Decorative textured finishes. Marmorino, Venetian plaster, sand-finished lime plaster, and other applied decorative finishes have intentional texture that is part of the aesthetic. These surfaces are sometimes recoated with emulsion to change the colour without removing the texture.
Artex and other acoustic textured coatings. Artex — and its many proprietary equivalents — was applied to millions of ceilings and some walls in British properties from the 1960s through to the 1980s. Pre-1985 Artex may contain asbestos (chrysotile, in low concentrations), and we always advise clients to test before sanding or disturbing old Artex. For painting Artex, we have a separate detailed guide; here we are focusing on the broader category of textured surfaces.
Rough-cast and pebble-dash. External finishes applied to many London interwar and post-war properties. Very rough, with embedded aggregate. Painting these requires high build products and thorough saturation of the surface profile.
Why Texture Makes Painting Harder
The key challenge with any textured surface is that paint sits on the peaks of the texture but struggles to fully penetrate into the valleys. This leads to two related problems: poor coverage (the surface looks uneven or patchy after painting because the valleys are not fully coated) and lack of adhesion at the base of the texture profile.
The solution to both problems is the same: use the right primer to penetrate and seal the texture, allow it to drive into the valleys rather than sitting on the peaks, and then build coverage with appropriate products and application methods.
Primers for Textured Surfaces
Sealer/stabilising primer. Many textured surfaces — particularly old, powdery, or chalky renders and plasters — need a stabilising primer before any decorative product. A stabilising primer (such as Dulux Trade Stabilising Primer or equivalent) is a thin, penetrating product that binds friable particles and provides a sound, non-powdery base for subsequent coats. Without it, topcoats will pull away the loose surface particles, leading to an uneven finish and poor adhesion.
High build primer. For rougher textures — pebble-dash, rough-cast, heavily textured render — a high build primer fills into the valleys and starts to build up a more even surface before the finish coat. High build primers are thicker than standard primers and need to be applied generously, working the product into the surface texture with a thick-pile roller.
Zinsser Bulls Eye 1-2-3 works well as a primer on moderate textured surfaces, providing good adhesion and sealing in a single coat.
Application Methods for Textured Surfaces
Roller pile depth. Standard 9mm or 12mm pile rollers are not appropriate for textured surfaces. A thick-pile roller — 18mm to 25mm, sometimes called a "shaggy" or "masonry" roller — is needed to push paint into the valleys of a textured surface. Using too fine a pile roller on a heavily textured surface will leave the valleys uncoated, resulting in patchy coverage however many coats are applied.
Working the product in. On rough textures, the roller alone will not get paint into every recess. Using a brush after the roller to stipple paint into the deeper recesses of the texture — a technique sometimes called "laying off" — ensures full coverage and good adhesion throughout the texture profile.
Multiple coats with full drying time. Textured surfaces typically require more coats than smooth plaster to achieve full, even coverage. Skipping drying time between coats traps moisture within the deep texture profile and can cause adhesion issues or prolonged drying. We always allow full drying time between coats, even on tight programme jobs.
Painting Over Marmorino and Venetian Plaster
Marmorino and Venetian plaster are lime-based decorative finishes with a polished or semi-polished surface texture and a slight translucency that gives them their characteristic depth. They are relatively common in premium London interiors — particularly in those decorated ten to fifteen years ago when these finishes were at their height of fashion.
Painting over marmorino with an emulsion coat will change the surface character significantly. The translucency and depth that are characteristic of marmorino come from the polished lime surface; a paint coating will sit on top and create a more uniform, opaque appearance. Clients who want to preserve the character of the marmorino but change the colour should work with a specialist who can tint or re-work the existing surface rather than overcoat it.
Where painting over marmorino is the right decision — either because the surface is in poor condition or because the client prefers a conventional flat-wall appearance — we use a breathable primer (marmorino is lime-based and needs to breathe) followed by a lime-compatible emulsion or a breathable modern emulsion with low vapour resistance.
Achieving a Smooth Finish on a Textured Surface
One question we get regularly is: can the texture be removed before painting, to achieve a smooth finish? The answer depends on the type of texture. Sand finish plaster can be skimmed over with a thin coat of finishing plaster to create a smooth surface — this is often the best long-term solution if the client wants a flat, modern appearance. Artex can be skimmed over similarly, provided the surface is sound. Pebble-dash and rough-cast cannot really be smoothed without full removal and re-rendering, which is a significant structural operation.
For advice on the right approach to your textured walls, contact us for a survey visit. We will assess the surface, recommend the most practical solution, and provide a clear quotation.