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External wall insulation

Solid walls let through twice as much heat as cavity walls – insulating solid external walls could cut your heating costs considerably.

For homes with solid walls

Was your home built before 1920? If it was, the external walls are probably solid rather than cavity. Cavity walls are made of two layers with a small gap or ‘cavity’ between them. Solid walls have no such gap, so they let more heat through.

Insulating solid walls

To insulate a solid wall from the outside, a layer of insulation material is fixed to the walls with mechanical fixings and adhesive, and then covered with protective layers of render or cladding. The finish covers the whole of the outside of your property, including existing brickwork, and will improve its appearance.

To prevent condensation, recessed areas around windows are insulated as well as the walls – with the depth of insulation depending on the width of the window frame.

All external pipework and other fittings are removed and replaced, and where necessary we extend window sills and the roof overhang to protrude beyond the new layer. It is also possible to fit additional sills to avoid replacing any of the original structure.

A Picture of before and after External Wall Insulation
Before and after External wall is installed

KNW can help

We are an approved and experienced installer of external wall insulation in properties across the North of England, and the systems we fit deliver improved thermal performance, weather proofing, fire resistance and noise reduction.

Our links
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