As energy efficiency and environmental awareness become increasingly important, homeowners in the UK are looking for ways to enhance the energy efficiency of their homes. External wall insulation is one of the measures that improve the energy efficiency of a property. However, many homeowners are still confused about the question: Does external wall insulation add house value?
The short answer is yes; external wall insulation adds house value by improving the energy efficiency and appearance of the property, enhancing indoor comfort, and potentially increasing its overall value.
In this article, we will explore the impact of external wall insulation on the value of your home. You will better understand how external wall insulation adds value to your home and why it is worthwhile.
What Is External Wall Insulation?
External wall insulation (EWI) is a type of insulation that is applied to the exterior walls of a building to improve its energy efficiency. EWI involves fixing insulation boards to the walls and then covering them with a render or cladding.
The insulation boards are made of materials such as polystyrene, mineral wool, or phenolic foam, and they vary in thickness depending on the level of insulation required.
EWI significantly reduces heat loss through a building’s walls, improves its thermal performance, and reduces heating costs. In addition to its energy-saving benefits, EWI also enhances the aesthetic appearance of a building and provides additional protection against weather and noise pollution.
EWI is typically installed by professional contractors with experience working with insulation materials and is familiar with the relevant building regulations and standards.
What Is The Importance Of House Value?
The value of a house is an important consideration for homeowners, whether they are planning to sell their property or not. House value refers to the estimated worth of a property and a range of factors such as location, size, condition, and amenities influence.
The value of a house has significant financial implications for the homeowner, as it impacts their ability to secure a mortgage, access equity, or sell their property for a profit.
For homeowners planning to sell their property, the house value is particularly important, as it determines the price at which the property is listed on the market. A higher house value also makes the property more attractive to potential buyers, increasing the likelihood of a sale and potentially resulting in a higher sale price.
Even for homeowners not planning to sell their property soon, the house value still has important implications. A higher house value provides greater financial security, as it can increase the homeowner’s equity in their property. This makes it easier to access credit or loans in the future, as the homeowner can use their property as collateral.
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ProGuard Exteriors are your first choice for quality local workmanship throughout the South East of England.
Call us today on 0800 612 5254 to arrange a free quote or get in touch for more information on how to protect and transform your home!


Which Benefits Does External Wall Insulation Provide To A Homeowner?
EWI offers a range of benefits for homeowners, from reducing energy bills to improving indoor comfort and air quality and increasing house value. The following are some benefits of EWI:
- Energy Efficiency And Lower Energy Bills: Insulating your external walls can significantly improve your home’s energy efficiency. This can result in lower energy bills and a more comfortable living environment, as less energy is required to maintain a consistent indoor temperature.
- Enhanced Thermal Performance And Reduced Heat Loss: External insulation can enhance the thermal performance of your home, reducing heat loss and assisting in the maintenance of a constant interior temperature. As a result, you will be able to live more comfortably and not have to use as much heating during the winter.
- Improved Indoor Comfort And Air Quality: Insulating your exterior walls can reduce draughts and cold spots in your home, making it more comfortable to live in. It can also improve air quality by reducing the risk of dampness and condensation, leading to mould and other health issues.
- Reduced Carbon Footprint: Exterior wall insulation will reduce your home’s carbon footprint by reducing the energy required for heating. This contributes to a more sustainable future and helps mitigate climate change’s impacts.
How External Wall Insulation Increases The EPC Rating Of Your Home?
EWI significantly increases a home’s Energy Performance Certificate (EPC) rating. EPC ratings are used to measure the energy efficiency of a property, with higher ratings indicating greater efficiency.
By minimising heat loss, this insulation increases a home’s energy efficiency, resulting in lower energy costs and more comfortable living space.
After EWI, a home’s EPC rating increases by several bands, making it more attractive to potential buyers and increasing its overall value. In some cases, external wall insulation even brings a property up to a higher EPC rating threshold, making it eligible for government incentives such as the Green Homes Grant.
To improve the EPC rating of a home through EWI, it is important to choose a reputable installer and ensure that the work meets the required standards.
A qualified installer can assess the property and recommend the most suitable insulation material and installation method for optimal energy efficiency and EPC rating improvement. Overall, EWI is an effective way to increase the EPC rating of a home and improve its energy efficiency, comfort, and value.

What Is the Potential Return on Investment for External Wall Insulation?
The potential return on investment (ROI) for external wall insulation can vary depending on various factors, including the installation cost, location, and current value.
However, external wall insulation is generally considered a worthwhile investment as it can offer significant savings on energy bills, enhance the property’s appearance, and increase its overall value.
According to a UK Energy Saving Trust report, external wall insulation saves homeowners up to £455 per year on energy bills. Depending on the average cost of the installation, it is possible to recoup the cost of external wall insulation within a few years.
Furthermore, EWI can increase a property’s energy efficiency rating, making it more attractive to possible buyers and increasing its overall value.
A study by the UK Government’s Department of Energy and Climate Change found that improving the energy efficiency of a property through measures such as external wall insulation can increase its value by up to 38%. This suggests that EWI can provide a significant ROI for homeowners, particularly those in areas where energy efficiency is a priority for buyers.
Does External Wall Insulation Cause Damp?
External wall insulation, when properly installed, should not cause dampness. In fact, it can help prevent dampness by reducing the amount of moisture that enters a building. External wall insulation involves adding a layer of insulation material to the exterior walls of a building, which helps to prevent heat loss and reduce energy bills.
The insulation material is then covered with a weather-resistant finish, such as render or cladding, to protect it from the elements. However, if EWI is installed incorrectly or if there are existing problems with the building, such as leaking gutters or damaged brickwork, then dampness may occur.
Choosing a reputable contractor and ensuring that any existing issues are addressed before installing external wall insulation is important. Overall, EWI can be a good way to make a building more energy efficient and save money on energy bills, as long as it is installed correctly and any problems are fixed first.

Final Words
After reading this article, we hope you understand: Does external wall insulation add house value? Basically, external wall insulation can add value to your home in several ways.
Not only can it improve the energy efficiency of your property and reduce your energy bills, but it can also enhance the appearance of your home and make it more comfortable to live in.
Additionally, EWI can increase the value of your property, making it more attractive to potential buyers and providing a potential return on investment.