Apply For External Wall Insulation Grants UK
For modern homes having solid walls, External wall insulation is the best solution!
Internal wall insulation V/S External wall insulation
Don’t have a wall cavity? External wall insulation is the best alternative! For solid walls, there are ideally two ways to insulate them.
- Internal wall insulation: Internal wall insulation is applied to the inner surface of the main exterior of walls. Typically, this is more cost-effective, but of course, it has some limitations.
- External wall insulation: External wall insulation is the process of adding insulation to an already-existing wall. For weather protection, the wall is usually completed with render or another type of cladding.
External wall insulation works wonders to improve the thermal efficiency of dwellings with solid walls.
Condensing Boilers are More Efficient
External Wall Insulation Cost
The cost of insulating your home can vary. For a three-bedroom semi-detached house, insulation typically ranges between £5,000 and £9,000. A larger detached home may cost between £8,000 and £15,000. These figures can increase when additional work is needed—such as relocating pipes or rewiring, which is sometimes unavoidable.
To achieve the best U-value for your walls and improve overall energy performance, it’s often smart to combine cavity-fill insulation with external wall insulation. This hybrid approach maximizes efficiency while minimizing heat loss.
At Envirofit, we guide you through these options and help you access ECO4 government grants, which could cover the full cost of your insulation—no out-of-pocket expenses for eligible homeowners and tenants.
Benefits of External Wall Insulation
Lack of a Wall Cavity
Many older homes lack a wall cavity, making traditional insulation impossible. We offer external wall insulation a perfect solution for solid-wall homes.
Don't Lose Floor Space
Internal wall insulation adds layers inside exterior walls, but can reduce room space by 100–150mm a concern for smaller homes. Envirofit offers smarter, space-saving solutions.
Protection Against Weathering
External wall insulation adds a protective layer to your home, shielding it from harsh weather, reducing maintenance costs, and extending the life of your property inside and out.
Embrace Eco-Friendly Comfort
External Wall Insulation cuts heat loss, lowers energy bills, and shrinks your carbon footprint all while keeping your home cosy.
Reduction in cold bridging
External wall insulation acts like a coat for your home, blocking cold bridges and keeping heat in. With Envirofit and ECO4, you can get it installed for free.