What insulation adds in RM11

59.3 → 76.3

Rating, now → potential

+17.0

Average uplift

£463

Avg saving / yr

12353

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 12353 certificates in RM11, the current rating of 59.3 could rise to about 76.3 out of 100. The estimated annual heating cost averages £1258 now, and about £795 after the recommended work – an estimated saving of roughly £463 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, as built, insulated (assumed) – 12.5%

Recorded as having no wall insulation: 77.5%.

Roofs

Pitched, 100 mm loft insulation – 20.0%
Pitched, no insulation (assumed) – 15.0%
(another dwelling above) – 10.0%

Recorded as having no roof insulation: 17.5%.

Glazing

Fully double glazed – 87.5%
Partial double glazing – 4.2%
Mostly multiple glazing – 4.2%

Main heating

Boiler and radiators, mains gas – 87.5%
Electric storage heaters – 7.5%
Warm air, mains gas – 2.5%

Which streets need it most

See the streets in RM11 with the highest share of homes rated band D or below.

Leakiest streets in RM11

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