What insulation adds in KT1

65.7 → 76.3

Rating, now → potential

+10.6

Average uplift

£167

Avg saving / yr

15503

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 15503 certificates in KT1, the current rating of 65.7 could rise to about 76.3 out of 100. The estimated annual heating cost averages £609 now, and about £442 after the recommended work – an estimated saving of roughly £167 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) – 37.5%
Cavity wall, as built, no insulation (assumed) – 15.0%
Cavity wall, as built, insulated (assumed) – 11.2%

Recorded as having no wall insulation: 56.2%.

Roofs

(another dwelling above) – 42.5%
Pitched, no insulation (assumed) – 7.5%
Pitched, 150 mm loft insulation – 7.5%

Recorded as having no roof insulation: 8.8%.

Glazing

Fully double glazed – 81.0%
Some double glazing – 11.9%
Mostly double glazing – 7.1%

Main heating

Boiler and radiators, mains gas – 70.0%
Electric storage heaters – 10.0%
Room heaters, electric – 7.5%

Which streets need it most

See the streets in KT1 with the highest share of homes rated band D or below.

Leakiest streets in KT1

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