What insulation adds in BR4

61.5 → 75.5

Rating, now → potential

+14.1

Average uplift

£210

Avg saving / yr

6745

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 6745 certificates in BR4, the current rating of 61.5 could rise to about 75.5 out of 100. The estimated annual heating cost averages £756 now, and about £546 after the recommended work – an estimated saving of roughly £210 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

Solid brick, as built, no insulation (assumed) – 55.0%
Cavity wall, as built, no insulation (assumed) – 17.5%
Cavity wall, filled cavity – 12.5%

Recorded as having no wall insulation: 72.5%.

Roofs

Pitched, no insulation (assumed) – 17.5%
Pitched, 150 mm loft insulation – 12.5%
Pitched, 100 mm loft insulation – 12.5%

Recorded as having no roof insulation: 25.0%.

Glazing

Fully double glazed – 88.5%
Mostly double glazing – 7.7%
Partial double glazing – 3.8%

Main heating

Boiler and radiators, mains gas – 82.5%
Electric storage heaters – 7.5%
Community scheme – 7.5%

Which streets need it most

See the streets in BR4 with the highest share of homes rated band D or below.

Leakiest streets in BR4

Keep exploring

In this area

Leakiest streets in BR4 Leaky The leakiest streets here