What is External wall insulation
External wall insulation (EWI) is a method used to improve the thermal efficiency of buildings by applying insulation material to the exterior walls. This process involves fixing a layer of insulation material to the outside of a building and then covering it with a special type of render or cladding. The primary purpose of External wall insulation is to reduce heat loss, leading to lower energy bills, increased indoor comfort, and reduced carbon emissions. It’s particularly beneficial for properties without cavity walls or for those where cavity wall insulation isn’t suitable. External wall insulation also helps in improving the external appearance of the building and can protect the building fabric against weathering and decay.
Why should I get external wall insulation?
External Wall Insulation (EWI) offers several benefits, making it a worthwhile investment for many homeowners. Some of the key advantages of EWI include:
- Reduced Energy Bills
- Increased Comfort
- Durability and Weather Protection
- Sound Resistance
How much can external wall insulation save?
External wall insulation(EWI) can lead to significant energy bill savings. The Energy Saving Trust estimates that for a typical gas-heated home, EWI can save homeowners between £115 and £360 per year.
The exact amount of savings depends on factors such as the type and size of the property. For example, in a detached house with four bedrooms, EWI could lead to savings of around £650 per year, while in a semi-detached house with three bedrooms, the savings could be around £390 per year.
The cost of external wall insulation is typically around £100 per square meter, and the total cost can range from £8,000 for a small flat to £22,000 for a larger property.
While the initial investment is significant, the long-term energy bill savings make EWI a cost-effective solution for many homeowners
