External Plastering London
External plastering — also known as rendering — protects your property from London's weather while dramatically improving its appearance. From traditional cement render to modern silicone systems and classic stucco, we deliver durable, weatherproof exterior finishes for homes and commercial buildings across London.
How much does external plastering cost in London?
External plastering (rendering) in London costs £40–£70 per m²: cement render £40–£50/m², silicone render £55–£70/m², and lime render £50–£75/m². A typical 3-bed semi-detached house costs £4,000–£8,000 fully rendered, with a render lifespan of 20–30 years. London Plastering Service covers all 32 boroughs and quotes within 60 minutes.
- Cement render £40–£50/m²
- Silicone render £55–£70/m²
- Lime render £50–£75/m²
- 3-bed semi £4,000–£8,000
- Render lasts 20–30 years
- All 32 London boroughs covered
When Is External Plastering Needed?
External plastering serves two vital purposes: protection and aesthetics. Understanding when it's needed helps you decide whether your property would benefit from rendering or re-rendering.
Weathered or damaged brickwork: London's weather — rain, frost, pollution — gradually degrades exposed brickwork and pointing. If bricks are spalling (flaking), pointing is crumbling, or walls are absorbing moisture, external render provides a protective weatherproof barrier that prevents further deterioration. This is particularly important for properties built before 1920 with softer, more porous bricks.
Unattractive exterior: Many London properties — particularly post-war builds, 1960s–70s houses, and properties with mismatched brick extensions — benefit enormously from rendering. A smooth, coloured render transforms tired or unattractive facades into modern, clean-looking exteriors. This is one of the most cost-effective ways to improve kerb appeal and property value.
Cracked or failed existing render: If existing render is cracked, loose, or blown (hollow-sounding when tapped), it's no longer protecting the wall beneath. Water ingress through cracked render causes damp, frost damage, and structural issues. Re-rendering before the damage spreads is far cheaper than repairing structural water damage.
Damp penetration: If you're experiencing penetrating damp — damp patches on internal walls that correspond to external walls, particularly after heavy rain — the external wall surface may be too porous. Rendering creates a waterproof barrier that stops water from reaching the internal wall surface.
Extension or renovation projects: New extensions often have different brick or block finishes that don't match the original property. Rendering the extension (or the whole property) creates a unified, seamless appearance. This is especially popular with side-return extensions and loft conversions where new and old materials meet.
Commercial property refurbishment: Shops, offices, and commercial buildings frequently use external render to refresh their appearance, cover unsightly brickwork, or rebrand with new colours. Silicone render in particular offers a clean, low-maintenance finish that looks professional and modern.
Types of External Plastering We Offer
Cement Render
The most common and cost-effective external plastering option. A mix of cement, sand, and lime applied in 2–3 coats. Can be finished smooth, textured, or painted.
- • Cost: £40–£50 per m2
- • Lifespan: 20–25 years
- • Best for: General residential use
- • Finish: Smooth or textured, painted
Silicone Render
Premium polymer-modified render with silicone water-repellent technology. Self-coloured (no painting needed), highly breathable, and crack-resistant.
- • Cost: £55–£70 per m2
- • Lifespan: 25–30 years
- • Best for: Modern homes, low maintenance
- • Finish: Smooth, wide colour range
Lime Render
Traditional breathable render ideal for period properties. Allows moisture to evaporate, preventing damp in older buildings with solid walls.
- • Cost: £50–£75 per m2
- • Lifespan: 50+ years
- • Best for: Listed buildings, pre-1920s properties
- • Finish: Natural, textured, traditional
Monocouche Render
Single-coat through-coloured render that's applied in one pass. Self-coloured, durable, and low-maintenance with excellent weather resistance.
- • Cost: £50–£65 per m2
- • Lifespan: 25–30 years
- • Best for: New builds, quick application
- • Finish: Scraped or textured, coloured
External Plastering Process
Site Survey and Quotation
We visit your property, assess the existing exterior, take measurements, and identify any issues that need addressing (damp, cracks, failing render). You receive a detailed, fixed-price quote with no obligation.
Preparation and Scaffolding
Scaffolding is erected where needed. Existing render is removed if damaged. Walls are cleaned, repaired, and treated with a primer or stabilising solution. Beads and trims are fixed to corners and reveals for clean lines.
Render Application
The base coat (scratch coat) is applied and scored to provide a key for the next coat. After curing, the top coat is applied and finished to the desired texture. For silicone or monocouche render, the colour is built into the mix, so no painting is required.
Finishing and Clean-Up
The render is finished to your chosen texture (smooth, scraped, roughcast). Edges, window reveals, and door frames are detailed. Scaffolding is removed, and the site is left clean and tidy. Final inspection ensures quality.
External Plastering Costs
External plastering costs in London range from £40 to £75 per square metre depending on the render type, property access, and preparation required. Below is a guide to typical project costs for common property types.
| Project Type | Approx. Area | Cost Range |
|---|---|---|
| Single wall (extension) | 15–25 m² | £600–£1,750 |
| Terraced house front | 30–40 m² | £1,200–£2,800 |
| Semi-detached (3 sides) | 100–120 m² | £4,000–£8,400 |
| Detached house | 150–200 m² | £6,000–£14,000 |
| Re-render over existing | Per m² | £35–£55/m² |
Prices include scaffolding, materials, and labour. Additional costs may apply for removing existing render, treating damp, or specialist finishes. All quotes are fixed after a site survey.
Common External Plastering Problems
Cracking
Hairline cracks are normal and usually cosmetic. Large, structural cracks indicate movement or substrate failure. Flexible silicone render minimises cracking, while proper preparation and the use of mesh reinforcement in vulnerable areas prevents most issues.
Blown or Hollow Render
Render that sounds hollow when tapped has lost adhesion to the wall — usually due to poor preparation or moisture behind the render. Affected areas must be cut out and re-rendered. Full removal may be needed if the problem is widespread.
Damp Staining
Dark patches on render indicate water penetration. This can be caused by hairline cracks, inadequate sealant around windows, or lack of a water-repellent coating. Silicone render and regular maintenance prevent this issue.
Algae and Mould Growth
North-facing or shaded walls may develop green algae or black mould. Self-cleaning silicone render resists organic growth. For existing render, professional cleaning and application of a biocidal wash extends the time between cleans.
External Plastering FAQs
Transform Your Property Exterior
From a single wall to a full house re-render, we deliver weatherproof, beautiful exterior finishes. Free quotes and surveys across London.
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