External Wall Insulation for Energy Efficiency
External wall insulation is an excellent solution for improving energy efficiency, reducing heat loss, and protecting your home or building. Whether you’re planning a retrofit, refurbishment, or new build, external wall insulation can help you meet UK building regulations while lowering energy bills and enhancing the aesthetics of your property.
At The Gutter and Cladding Company, we specialise in high-performance insulation systems, including the versatile Celotex and YBS SuperQuilt insulation. Combining cutting-edge thermal efficiency with stylish cladding options, our solutions deliver comfort, durability, and value for properties across Dorset, Hampshire, Wiltshire, and surrounding areas.
Discover more about our external wall insulation services by speaking to our team today. Call us on 01202 470044 for a free quote.
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The Gutter and Cladding Company is a family run business keeping your property dry, warm and stylish since 1997 where quality, professionalism and customer satisfaction come first. We are a team of home improvement experts to enhance the beauty, comfort and energy efficiency of your home. We have a range of our renowned services, Cladding, Guttering, Fascias, Soffits and proudly offering our new service of premium Windows and Doors installations. We look forward to helping you with your home improvements journey.
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What Is External Wall Insulation?
External wall insulation involves adding a layer of thermal insulation to the exterior surface of a building’s walls. This system is ideal for:
- Retrofits: Upgrade older buildings that lack sufficient insulation.
- Refurbishments: Improve energy efficiency in renovations.
- New Builds: Integrate modern insulation solutions from the start.
Unlike internal insulation, external systems preserve your indoor space while achieving excellent thermal performance. It also protects walls from weathering, preventing damage caused by moisture, frost, and UV rays. It’s a popular choice for homeowners, builders, and architects aiming to exceed UK building regulations for energy efficiency.
Get in touch with our team today to learn more about adding wall insulation to the exterior of your property. Call us on 01202 470044.
Benefits of External Wall Insulation
Improve Energy Efficiency
External wall insulation dramatically reduces heat loss, keeping your home warm in winter and cool in summer. This reduces energy usage and lowers your bills while helping to improve your property’s EPC rating.
Maximise Indoor Space
Since the insulation is applied externally, it doesn’t reduce your indoor living space. This is particularly valuable in homes with smaller interiors.
Aesthetic Options
External insulation is easily combined with a wide range of cladding finishes, such as render, timber, or decorative tiles. These options allow you to improve your home’s energy performance while enhancing its appearance.
Weather Protection
External wall insulation acts as a protective shield for your building, reducing the risk of moisture ingress, frost damage, and other weather-related wear and tear.
Long-Term Value
Investing in external wall insulation improves your property’s energy efficiency and overall kerb appeal, adding long-term value to your home or building.
Speak to our team to learn how your property could benefit from adding exterior wall insulation. Call us on 01202 470044.
Celotex and SuperQuilt External Wall Insulation
At The Gutter and Cladding Company, we recommend Celotex or SuperQuilt insulation for their advanced performance and versatility. These systems use a multi-layered reflective technology to deliver high thermal efficiency in a thin profile, making it perfect for retrofits, refurbishments, and new builds.
By combining thermal insulation with vapour control, Celotex and SuperQuilt ensure an airtight installation that maximises energy savings while preventing moisture build-up.
Key Features of These Insulation Systems
- Thermal Efficiency: Achieves U-Values as low as 0.17 W/m²K, exceeding building regulation requirements.
- Slim Profile: Compact design minimises bulk, ideal for projects where space is limited.
- Versatility: Compatible with various finishes, including render, timber cladding, and tiles.
- Vapour Control Layer: Ensures airtight and moisture-resistant performance.
- Certified Quality: Fully compliant with UK building regulations and BBA-certified.
We are expert installers of this insulation system, so get in touch today to discuss adding enhancing your building’s energy efficiency.
How to Install External Wall Insulation
Installing external wall insulation is a straightforward process when handled by professionals. Here’s how it works:
- Prepare the Walls: Clean and inspect the exterior wall surface.
- Fix Battens: Install battens to create an air cavity for ventilation.
- Apply Insulation: Fit the insulation layers to the battens and seal joints using foil tape.
- Install a Breathable Membrane: Add a layer of breathable material to enhance.
- Fix Battens: Install battens for cladding to be fixed too.
- Finish with Cladding: Complete the installation with your choice of external cladding.
Proper installation ensures optimal thermal performance and long-lasting results.
Book an installation with our professionals by calling us on 01202 470044.
U-Values for External Wall Insulation
The following shows how different setups achieve specific U-Values:
Render & Render Board (Solid Brick)
- Batten Depth - 25mm
- U-Value (W/m²K) - 0.34
Render & Render Board (Cavity Wall)
- Batten Depth - 38mm
- U-Value (W/m²K) - 0.19
Cladding (Solid Brick)
- Batten Depth - 25mm
- U-Value (W/m²K) - 0.32
All U-Values are BDA Kiwa certified, ensuring compliance with UK building regulations.
Want to learn more about the U-Values with added wall insulation? Call our team today on 01202 470044.

Applications of Cladding Wall Insulation
External wall insulation is suitable for a wide range of applications, including:
- Residential Properties: Upgrade the energy efficiency of houses, flats, and heritage buildings.
- Commercial Buildings: Improve thermal performance in offices, schools, and retail spaces.
- Retrofit and Refurbishment Projects: Transform older properties with modern insulation.
With multiple cladding finishes available - such as timber, render, or decorative tiles - external insulation can suit any architectural style.
Contact our team to discuss adding wall insulation to the exterior of your home. Call us on 01202 470044.
External Wall Insulation FAQs
External wall insulation involves applying a layer of thermal insulation to the exterior surface of a building, improving energy efficiency and weather protection.
Celotex and SuperQuilt use reflective layers to trap heat, achieving high thermal efficiency in a thin profile. It also includes a vapour control layer to prevent moisture issues.
Yes, external wall insulation with Celotex or SuperQuilt exceeds the Part L requirements for U-Values, ensuring compliance with UK standards.
Popular options include render systems, timber cladding, and decorative tiles, allowing you to customise your property’s look.


Contact Us for Your Insulation Needs
Ready to improve your home or building with high-performance external wall insulation? At The Gutter and Cladding Company, we specialise in tailored solutions using Celotex or SuperQuilt insulation and premium cladding finishes.
Contact us today for a free quote or consultation. Let us help you achieve energy efficiency, meet UK building regulations, and enhance your property’s value.