What insulation adds in TW14

65.4 → 73.1

Rating, now → potential

+7.7

Average uplift

£88

Avg saving / yr

11990

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 11990 certificates in TW14, the current rating of 65.4 could rise to about 73.1 out of 100. The estimated annual heating cost averages £425 now, and about £337 after the recommended work – an estimated saving of roughly £88 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

Average thermal transmittance 0.38 W/m²K – 48.8%
Solid brick, as built, no insulation (assumed) – 16.2%
Cavity wall, as built, no insulation (assumed) – 10.0%

Recorded as having no wall insulation: 26.2%.

Roofs

(other premises above) – 32.5%
Average thermal transmittance 0.17 W/m²K – 17.5%
(another dwelling above) – 12.5%

Recorded as having no roof insulation: 3.8%.

Glazing

Fully double glazed – 92.6%
Single glazed – 3.7%
Fully triple glazed – 3.7%

Main heating

Room heaters, electric – 56.2%
Boiler and radiators, mains gas – 33.8%
Community scheme – 5.0%

Which streets need it most

See the streets in TW14 with the highest share of homes rated band D or below.

Leakiest streets in TW14

Keep exploring

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