What insulation adds in BR7

60.1 → 77.2

Rating, now → potential

+17.1

Average uplift

£259

Avg saving / yr

8128

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 8128 certificates in BR7, the current rating of 60.1 could rise to about 77.2 out of 100. The estimated annual heating cost averages £877 now, and about £618 after the recommended work – an estimated saving of roughly £259 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) – 57.5%
Cavity wall, as built, no insulation (assumed) – 17.5%
Cavity wall, filled cavity – 8.8%

Recorded as having no wall insulation: 76.2%.

Roofs

Pitched, no insulation (assumed) – 20.0%
Pitched, 100 mm loft insulation – 15.0%
Pitched, 250 mm loft insulation – 8.8%

Recorded as having no roof insulation: 23.8%.

Glazing

Fully double glazed – 86.7%
Mostly double glazing – 8.9%
Partial double glazing – 2.2%

Main heating

Boiler and radiators, mains gas – 90.0%
Electric storage heaters – 2.5%
Boiler and underfloor heating, mains gas – 2.5%

Which streets need it most

See the streets in BR7 with the highest share of homes rated band D or below.

Leakiest streets in BR7

Keep exploring

In this area

Leakiest streets in BR7 Leaky The leakiest streets here