What insulation adds in BR6

62.7 → 76.5

Rating, now → potential

+13.8

Average uplift

£224

Avg saving / yr

18740

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 18740 certificates in BR6, the current rating of 62.7 could rise to about 76.5 out of 100. The estimated annual heating cost averages £878 now, and about £654 after the recommended work – an estimated saving of roughly £224 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, no insulation (assumed) – 27.5%
Cavity wall, filled cavity – 22.5%
Solid brick, as built, no insulation (assumed) – 17.5%

Recorded as having no wall insulation: 45.0%.

Roofs

Pitched, 100 mm loft insulation – 17.5%
Pitched, no insulation (assumed) – 10.0%
Pitched, 200 mm loft insulation – 10.0%

Recorded as having no roof insulation: 17.5%.

Glazing

Fully double glazed – 85.7%
Mostly double glazing – 9.5%
Single glazed – 4.8%

Main heating

Boiler and radiators, mains gas – 77.5%
Room heaters, electric – 5.0%
Warm air, mains gas – 2.5%

Which streets need it most

See the streets in BR6 with the highest share of homes rated band D or below.

Leakiest streets in BR6

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