Cavity Wall Insulation and Your EPC Rating

Many properties built after 1930 have cavity walls — two layers of brick with a gap between them. If this cavity is unfilled, a substantial amount of heat escapes through the walls. Filling the cavity with insulation material is a proven way to improve energy efficiency and lift your EPC band by one or more ratings.

Cavity wall insulation typically costs between £400 and £700 and is installed by drilling small holes in the external brickwork, injecting insulation, and sealing the holes. It is unsuitable for some properties, including those with damp issues, narrow cavities, or certain construction types. A pre-installation survey confirms suitability.

Landlords in Leyton and East London with post-war terraces and semis often benefit greatly from cavity wall insulation. After installation, Leyton Landlord Certificates can provide an updated EPC — call 0800 654 6211 to book.