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Silicone Render – Premium Self-Cleaning Thin-Coat Renders 2025/2026
Buy premium thin coat silicone render with nationwide next-day UK delivery. Our professional-grade systems offer a selection of 1,000+ colours, available in 1.0–1.5 mm and 1.5–2.0 mm grain sizes. Engineered with advanced hydrophobic self-cleaning technology, these renders are designed specifically to exceed Part L 2025 building regulations.
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Why Thin-Coat Silicone Renders Dominate UK Facades in 2025/2026
Silicone render is the undisputed #1 choice for coastal, exposed, and high-traffic UK properties. Unlike traditional cement renders, these breathable render systems allow moisture vapour to escape while providing an absolute hydrophobic barrier against wind-driven rain.
- Self-cleaning technology: High surface tension causes water to bead, washing away dirt and algae automatically.[5]
- High Vapour Permeability: Rated at Sd 0.10–0.20 m, preventing interstitial condensation in EWI systems.[6]
- Flexibility & Crack-Bridging: Advanced siloxane resins provide elasticity to handle building movement.
- Bio-Protection: Formulated with active biocides to resist mould and algae growth in damp UK climates.[7]
Grain Size Guide – 1.0–1.5 mm vs 1.5–2.0 mm Finish
| Feature | 1.0–1.5 mm (Smooth Modern) | 1.5–2.0 mm (Traditional Rustic) |
|---|---|---|
| Texture | Fine, velvet-like contemporary finish | Visible grain, heritage/traditional style |
| Coverage | Approx. 9–11 m² per 25 kg bucket [8] | Approx. 7–9 m² per 25 kg bucket [9] |
Silicone Rendering FAQ – Expert Advice for Professionals
How does silicone render comply with Part L 2025 regulations?
To meet the 0.18 W/m²K U-value requirement for external walls, silicone render must be used as the decorative finish in a certified EWI system. It protects the insulation layer from moisture, ensuring it maintains its thermal efficiency for 30+ years.[10, 11]
Is silicone render better than monocouche?
Yes, for projects requiring durability and crack-resistance. Silicone is a "thin-coat" system (1.5–3.0 mm), making it far more flexible than thicker monocouche systems. Its hydrophobic properties also mean significantly lower maintenance in wet UK regions.[12, 13]
Can silicone render be applied in winter?
Standard application requires temperatures between +5°C and +25°C. However, by using a setting accelerator like Atlas Eskimo, contractors can safely apply renders in high humidity and low temperatures.[14, 15]
How do I maintain a self-cleaning render?
While rainfall washes away most surface dirt, we recommend a low-pressure hose-down every 12 months. Algae in shaded areas can be treated with a professional softwash biocide to preserve the BBA-approved finish.[16, 17]
Do I need to prime the substrate before rendering?
Yes. Using a quartz-based primer like Atlas Cerplast or Ceresit CT16 is mandatory to equalise suction and ensure a high-strength bond between the basecoat and the topcoat.[18, 19]
Need a detailed technical specification?
Contact our team for U-value calculations and project pricing at 023 8200 2442.
Visit our Knowledge Hub for the 2025 EPS Insulation Guide →