In recent years, external wall insulation (EWI) has drawn a lot of attention as a practical and affordable way to increase a building's energy efficiency, gaining popularity because of the growing emphasis on sustainability and lowering carbon footprints.
"External wall insulation is significantly more expensive than cavity wall insulation, and also tends to be dearer than lining main walls internally," says chartered surveyor, Ian Rock. "However, much depends on the complexity of the job. A simple rectangular shaped property with few external obstructions should be relatively inexpensive."
Another key factor, says Ian, is if you've got a generous roof overhang which should save the major expense of having to extend the rafters, roof coverings and guttering to accommodate the thicker walls.
In general, you can expect to pay external wall insulation costs starting from £8,000 for a terraced house up to around £19,000 for larger homes.
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