What insulation adds in DA15

64.5 → 80.2

Rating, now → potential

+15.7

Average uplift

£188

Avg saving / yr

10196

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 10196 certificates in DA15, the current rating of 64.5 could rise to about 80.2 out of 100. The estimated annual heating cost averages £703 now, and about £515 after the recommended work – an estimated saving of roughly £188 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) – 30.0%
Cavity wall, filled cavity – 26.2%
Cavity wall, as built, no insulation (assumed) – 25.0%

Recorded as having no wall insulation: 55.0%.

Roofs

Pitched, 100 mm loft insulation – 22.5%
Pitched, no insulation (assumed) – 15.0%
Pitched, 300 mm loft insulation – 7.5%

Recorded as having no roof insulation: 15.0%.

Glazing

Fully double glazed – 91.7%
Mostly double glazing – 4.2%
Single glazed – 2.1%

Main heating

Boiler and radiators, mains gas – 83.8%
Electric storage heaters – 5.0%
Community scheme – 5.0%

Which streets need it most

See the streets in DA15 with the highest share of homes rated band D or below.

Leakiest streets in DA15

Keep exploring

In this area

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