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External Wall Insulation

Installing External Wall Insulation (EWI) can save you over £500 a year on energy bills and reduce up to 1.8 tonnes of carbon emissions, all while enhancing the look and comfort of your home.
 

Government grants are available to help fully or partially cover the cost

 

Apply now to check your eligibility.

Did you know?

External wall insulation can cut heat loss, reduce fuel bills by up to 25%, and enhance home comfort while protecting the building fabric.

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The Basics of External Wall Insulation

Many homes built before the 1930s were constructed with solid walls, meaning they lack the internal cavities found in modern properties that can be filled with insulation. As a result, these homes can only be insulated externally or internally to boost energy efficiency. The goal is simple to reduce the amount of heat escaping through your walls, lowering your home’s heating demand and keeping it warmer for longer.

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With rising energy costs across the UK, maintaining a warm home is becoming increasingly expensive. British houses are among the least energy-efficient in Europe, but External Wall Insulation (EWI) offers an effective solution. It helps retain heat, lower energy bills, and reduce your carbon footprint making it a smart choice for both your wallet and the planet.

Image by Phill Brown

Is My Home Suitable for External Wall Insulation?

To qualify for External Wall Insulation (EWI), your property should meet the following criteria:

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  • Built with solid brick, stone, or concrete walls (not timber-frame)

  • Structurally sound, with no major defects or repairs needed

  • Not listed or located within a conservation area or World Heritage site

  • Free from damp or moisture issues in the walls

  • Have clear access to external walls for installation

  • Not have cavity walls that are already insulated or suitable for cavity fill

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If you’re unsure whether your home is suitable, our expert team can assess your property and provide clear, friendly guidance.

HOW IT WORKS?

External Wall Insulation involves adding a high-performance insulating layer (usually around 90mm thick) to the outside of your property, then finishing it with a strong, weatherproof render. Since the insulation is installed externally, it won’t affect your indoor space and can be fitted quickly and with minimal disruption.​This upgrade not only provides a protective barrier against the elements but also enhances sound insulation and helps prevent damp and condensation.​By improving your home’s energy efficiency, EWI can significantly reduce heating costs, refresh the look of your walls, and even boost your property’s value—all while creating a warmer, more comfortable living environment.

BENEFITS OF EXTERNAL WALL INSULATION

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External Wall Insulation (EWI) is one of the most effective ways to prevent heat from escaping through your walls all without losing any valuable indoor space. Beyond improving comfort and warmth, it offers several key benefits:

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  • Adds long-term value to your property

  • Transforms and refreshes the exterior of your home

  • Preserves your internal floor area

  • Reduces energy bills through greater thermal efficiency

Upgrade your home’s comfort and curb appeal with External Wall Insulation.
Apply now and begin saving on energy costs.

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