What Is External Wall Insulation (EWI)?
External wall insulation (EWI) is a thermal improvement solution applied to the outside walls of buildings. The system typically consists of insulation boards (EPS, mineral wool, or XPS), base coats, reinforcing mesh, primers, and topcoat renders such as silicone or acrylic finishes.
Why Choose External Wall Insulation?
✅ Pros:
- Improved Thermal Efficiency: Reduces heat loss and lowers energy bills.
- Enhanced Aesthetics: Modern renders are available in various colours and textures.
- Increased Property Value: A visually refreshed and energy-efficient home is more marketable.
- Moisture Protection: Prevents condensation and damp issues.
❌ Cons:
- Initial Cost: Higher upfront investment compared to internal insulation.
- Planning Permission: May be required in some areas.
- Installation Time: Weather-dependent and can take a few days to weeks.
Rendering System Solutions: Silicone Renders
Silicone renders are among the most popular topcoat choices due to their:
- Water repellence
- Breathability
- Long-lasting colour retention
- Flexibility to resist cracks
These renders are ideal for both new builds and refurbishment projects.
Why Choose Henkel/Ceresit Products?
At Mrowka UK, we proudly offer Henkel/Ceresit products – a global leader known for innovative construction materials.
Ceresit Rendering & EWI Systems are:
- Engineered for durability and weather resistance
- Available in a wide range of colours and textures
- Supported with technical documentation and certifications
Using trusted brands like Ceresit ensures the longevity and performance of your external wall insulation system.
Best Products for Your EWI Project
We recommend:
- Ceresit ZU or CT 85 as adhesive and base coat
- Ceresit CT 74/76 Silicone Renders for topcoat
- EPS boards, mineral wool or XPS depending on building type
- High-quality accessories including fixings, mesh, primers and beads
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Importance of Choosing Quality Materials
Using premium-grade products means:
- Better energy savings over time
- Fewer maintenance issues
- Stronger resistance to weather and impact
- Improved curb appeal with vibrant, fade-resistant finishes
Conclusion
Upgrading your property with external wall insulation and rendering systems not only improves energy performance but also boosts your home’s appearance and value. At Mrowka UK, we supply industry-leading solutions backed by Henkel/Ceresit – ensuring professional results every time.
Explore our EWI products today and transform your exterior with lasting performance.