External Wall Insulation

Upgrade Your Home with External Wall Insulation

Maximise Energy Savings!


If your home was built more than 20 years ago, chances are it could benefit from external wall insulation. Adding an extra layer of insulation to the outside walls can transform the look of your property while making the interior more comfortable and energy efficient. At Advanced Wall Protection, we specialise in external wall insulation installation for homes across Leicester, Leicestershire, Birmingham and throughout the Midlands. Read on to learn more about how external insulation can help upgrade your home.

What is External Wall Insulation?

External wall insulation involves affixing rigid insulation boards or panels to the existing walls, then covering them with mesh reinforced render or decorative cladding. This creates an additional protective layer that insulates your home from the elements. Various materials can be used for insulation including expanded polystyrene (EPS), mineral wool, phenolic foam or insulated render. These work together to add thermal performance and weatherproofing.


With the price of energy bills rising regularly, adding effective insulation means you will be spending less on heating bills and using less fossil fuel. So external wall insulation can help improve your home’s sustainability credentials. The benefits are endless for external wall insulation in Leicester, Leicestershire, Birmingham and the Midlands; you will feel the benefit.

If you install renewable tech to run your central heating, you will benefit from an even more environmentally-friendly property. What more could you want? Reducing your environmental impact all whilst saving money on your bills. Our team is always looking for our next job, so reach out, and we will come and install external wall insulation as soon as possible!


Comprehensive Site Evaluation

On-site assessments of your home’s unique needs and specs

Material and Finish Recommendations

Recommendations on suitable insulation materials and finishes

Full Project Management

Management of the entire installation process and timelines

Professional Installation Services

Application of insulation panels, renders, brick slips or decorative cladding

Finishing Touches for Total Transformation

Final weatherproofing and visual enhancements to complete the transformation


Frequently Asked Questions

When installing external wall insulation (EWI) on a home, there are many factors to consider for each individual property:

-The age of the building – Older buildings may require additional preparation work before EWI can be installed. Newer builds may already have some insulation so less may be needed.

-The size and style – Larger, detached houses will likely require more insulation than smaller terraced homes. The architectural style may also impact the type of insulation and finishing that can be used.

-Insulation materials – Different insulation boards have different thermal performance and costs. Mineral wool or polymer boards are common options. The thickness required also impacts cost.

-Render and finishes – The external render provides weatherproofing and can have textured finishes for aesthetics. Many textures and colours are available.

Overall, EWI costs can range from £8,000 to £20,000 or more depending on the property. Though it is a big investment, the long-term savings on energy bills usually make the expense worthwhile. Our team can survey your home and advise the best EWI solution for you.

Planning permission is not usually required for installing external wall insulation (EWI) on your home. However, there are some exceptions:

Listed Buildings – If your property is listed or in a conservation area, planning permission will be needed prior to EWI installation. We can guide you through the process.

Terraced Houses – For terraced homes where the external wall runs onto a public pavement, planning permission may be needed as the insulation will extend the wall.

Though EWI does not count as extending the building, building regulations require a Building Notice to be submitted for the exterior changes. A council building inspector will visit at the start and end of the installation to ensure compliance.

So in most cases, EWI does not need full planning permission. Our team is experienced with building regulations and can ensure your insulation project satisfies all necessary council requirements. We handle the paperwork so you can focus on choosing the perfect insulation system for your property.

Installing a proper external wall insulation (EWI) system can reduce heat loss through walls by 35-45%, leading to substantial savings on energy bills.

According to calculations by the Energy Saving Trust, an independent organisation, a typical 3-bedroom semi-detached home could save around £400 per year on heating costs after installing EWI to the recommended standards.

For maximum savings, EWI should be combined with other insulation and draught-proofing measures to create a whole-house system that minimises heat loss. Our team can survey your home and advise the best combination of insulation improvements to reduce your energy costs.

The time required to install external wall insulation (EWI) depends on the size of your property and the weather conditions.

For a small property like a terraced house, it can typically be completed within 1 week during warmer months. However, for a larger detached house, it may take 2-3 weeks to fully install the EWI, especially during late autumn and winter.

The installation process involves preparing the existing walls, fitting insulation boards, applying a reinforcing layer and render, then finishing with textures or paint. The drying times required between layers can be impacted by cold or wet weather.

Our experienced installers will work efficiently to complete the EWI application as quickly as possible. We’ll provide an accurate timeframe for your project after surveying your property and factoring in the weather forecast. With careful planning, we can have your home insulated in no time!


We work diligently to minimise disruption to your home throughout the insulation application process. Our teams are highly trained and experienced to deliver professional, quality results.


The Difference Quality Installation Makes

Proper installation is crucial to realise the full benefits of external wall insulation. Our installers are certified through industry schemes such as ESA, GIH, and INCA. This expertise ensures the insulation will perform as intended for maximum energy savings. Shoddy installation could lead to worse thermal performance along with risks of damage. Simply put – the quality of materials and workmanship matter.

Ready to Transform Your Home?

If your home’s exterior walls feel drafty or lack visual appeal, external insulation can help. Contact Advanced Wall Protection today to schedule an on-site assessment and receive a competitive quote for your project. We look forward to helping you upgrade your home’s thermal performance, weatherproofing, noise reduction and kerb appeal.

Our reliable and knowledgeable team is here to assist you when you need it.
Contact us to see how we can help

Read Our Amazing Reviews!


Here are several reasons to consider us for your exterior rendering and wall coating project:

We’ll thoroughly evaluate your needs before proceeding, ensuring that a wall rendering is the best solution for you. Our experienced team can provide all the guidance you need.

Explore Our Recent Projects​

View a sample of the finished work we have accomplished in recent years

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