What insulation adds in WD3

67.8 → 77.3

Rating, now → potential

+9.5

Average uplift

£127

Avg saving / yr

Certificates

The realistic uplift

Each energy certificate lists the improvements an assessor recommends and the rating the home would reach if they were done. Averaged across 69 certificates in WD3, the current rating of 67.8 could rise to about 77.3 out of 100. The estimated annual heating cost averages £496 now, and about £369 after the recommended work – an estimated saving of roughly £127 a year.

These are the register's own estimates, averaged across many homes; the figure for any one property depends on its fabric and how it is heated.

What the certificates say about the fabric

The most common construction descriptions recorded across these certificates. Percentages are of certificates where the field was recorded.

Walls

Cavity wall, as built, insulated (assumed) – 65.0%
Timber frame, as built, insulated (assumed) – 12.5%
Solid brick, as built, no insulation (assumed) – 12.5%

Recorded as having no wall insulation: 12.5%.

Roofs

(another dwelling above) – 55.0%
Pitched, insulated (assumed) – 12.5%
Pitched, 250 mm loft insulation – 7.5%

Recorded as having no roof insulation: 2.5%.

Glazing

Fully double glazed – 100.0%

Main heating

Room heaters, electric – 32.5%
Boiler and radiators, electric – 32.5%
Boiler and radiators, mains gas – 12.5%

Which streets need it most

See the streets in WD3 with the highest share of homes rated band D or below.

Leakiest streets in WD3

Keep exploring

In this area

Leakiest streets in WD3 Leaky The leakiest streets here