What insulation adds in TW13

66.6 → 79.7

Rating, now → potential

+13.1

Average uplift

£123

Avg saving / yr

15635

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 15635 certificates in TW13, the current rating of 66.6 could rise to about 79.7 out of 100. The estimated annual heating cost averages £527 now, and about £404 after the recommended work – an estimated saving of roughly £123 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) – 25.0%
Cavity wall, filled cavity – 21.2%
Cavity wall, as built, no insulation (assumed) – 21.2%

Recorded as having no wall insulation: 46.2%.

Roofs

(another dwelling above) – 16.2%
Pitched, 100 mm loft insulation – 10.0%
Pitched, 75 mm loft insulation – 8.8%

Recorded as having no roof insulation: 8.8%.

Glazing

Fully double glazed – 92.9%
Mostly double glazing – 4.8%
Partial double glazing – 2.4%

Main heating

Boiler and radiators, mains gas – 88.8%
Room heaters, electric – 6.2%
Electric storage heaters – 3.8%

Which streets need it most

See the streets in TW13 with the highest share of homes rated band D or below.

Leakiest streets in TW13

Keep exploring

In this area

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