The short answer
Rendering is applying a coating of mortar or a modern render system to the external walls of a building to protect them from the weather and improve their appearance. It is built up in coats over a prepared wall — a base coat (often with reinforcing mesh) and a coloured or textured topcoat — and can be smooth, scraped or textured. Render protects the masonry from rain, can help with insulation when combined with boards, and gives a uniform finish over mixed or tired brickwork. The system chosen depends on the wall: modern through-coloured renders for cavity walls, breathable lime for older solid walls. These are general descriptions, not advice for your property.
Rendering is one of the oldest ways of finishing a building, and it is still widely used today — both on new homes and to refresh and protect existing ones. This guide explains what rendering is, what the job involves from preparation to topcoat, the finishes you can choose, and the main reasons people render. All figures are typical illustrations rather than quotes, and rendering should be carried out by a trade-accredited rendering specialist.
Rendering at a glance
- What it is A protective coating on external walls
- Coats Prep, base coat (+ mesh), topcoat
- Finishes Smooth, scraped, textured, dashed
- Why Weather protection, looks, uniformity
- Cost (fitted) £40–£70 per m²
- Lifespan ~20–30 years (modern systems)
What the job involves
A rendering job follows a clear sequence. The wall is prepared first — cleaned, repaired and made sound, with any damp or defects addressed, because render needs a stable surface to bond to. A base coat is then applied, often with a reinforcing mesh embedded in it to control cracking. Finally the topcoat goes on, which carries the colour and texture. Modern through-coloured systems include a primer and a coloured topcoat; traditional cement render is usually painted once it has cured. Scaffold is used for anything above ground-floor reach. See types of render explained for how the systems differ.
| Stage | What happens |
|---|---|
| Preparation | Clean, repair and make the wall sound; fix beads and stop-ends |
| Base coat | Apply the base render, often with reinforcing mesh |
| Topcoat | Apply the coloured or textured finish coat |
| Finishing | Texture, scrape or smooth; cure; paint if cement-based |
The finishes you can choose
Render can be finished in several ways. A smooth finish gives a clean, contemporary look and is common with silicone and acrylic systems. A scraped texture is typical of monocouche. Heavier textures and dashed finishes — such as pebbledash — throw small stones onto the coat for a traditional, hard-wearing surface. Colour comes either through the render itself (through-coloured systems) or from paint applied afterwards. For the popular modern options, see silicone vs acrylic vs monocouche render.
Why people render a house
People render for three broad reasons: to protect the masonry from driving rain and weathering; to improve appearance, giving a clean, uniform finish over mixed, repaired or tired brickwork; and to improve warmth, when render is combined with external wall insulation. Rendering can also tidy up a facade before sale. The benefits weigh differently for every home — see is rendering worth it and does rendering add value. Where insulation is added, Building Regulations apply.
Compare rendering quotes
Once you know what rendering involves, the next step is a survey and an itemised quote. Use our service to compare quotes from trade-accredited rendering specialists in your area.
Frequently asked questions
What does rendering a house mean?
It means applying a protective, decorative coating — mortar or a modern render system — to the external walls, built up in coats over a prepared surface and finished smooth, scraped or textured. It protects the masonry from weather and gives a uniform appearance.
How many coats does render need?
Typically a base coat and a topcoat, often with a reinforcing mesh in the base coat to control cracking. Traditional cement render may use more coats and is painted after curing; modern through-coloured systems carry the colour in the topcoat. A specialist confirms the build-up for your wall.
How long does render last?
Modern through-coloured systems can last around 20–30 years with little maintenance when well applied; painted cement render needs periodic repainting and is more prone to cracking. Good preparation and a system matched to the wall are what make render last.
Can any wall be rendered?
Most masonry walls can be rendered, but the system must suit the wall — older solid walls usually need a breathable render such as lime, while modern cavity walls suit silicone or monocouche. A specialist assesses the wall construction and condition before recommending a system.
Sources & further reading
- Render system manufacturers’ approved-installer schemes — system specification, finishes and warranties
- Federation of Master Builders (FMB) — finding vetted builders and consumer guidance
- GOV.UK / Building Regulations Approved Document L — thermal standards when external wall insulation is added
- RICS — guidance on home improvements and value
This is general information, not advice for your specific property. The right render depends on your walls; rendering should be carried out by a trade-accredited rendering specialist. We are an independent information and introduction service, not a renderer.