What insulation adds in SE7

69.1 → 79.2

Rating, now → potential

+10.1

Average uplift

£134

Avg saving / yr

10871

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 10871 certificates in SE7, the current rating of 69.1 could rise to about 79.2 out of 100. The estimated annual heating cost averages £530 now, and about £396 after the recommended work – an estimated saving of roughly £134 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) – 47.5%
Solid brick, with external insulation – 17.5%
Cavity wall, filled cavity – 12.5%

Recorded as having no wall insulation: 52.5%.

Roofs

(another dwelling above) – 35.0%
Pitched, 100 mm loft insulation – 12.5%
Pitched, 200 mm loft insulation – 7.5%

Recorded as having no roof insulation: 12.5%.

Glazing

Fully double glazed – 77.3%
Mostly double glazing – 9.1%
High performance glazing – 9.1%

Main heating

Boiler and radiators, mains gas – 87.5%
Community scheme – 7.5%
Room heaters, electric – 2.5%

Which streets need it most

See the streets in SE7 with the highest share of homes rated band D or below.

Leakiest streets in SE7

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