What insulation adds in TW7

68.3 → 80.4

Rating, now → potential

+12.1

Average uplift

£176

Avg saving / yr

17269

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 17269 certificates in TW7, the current rating of 68.3 could rise to about 80.4 out of 100. The estimated annual heating cost averages £556 now, and about £381 after the recommended work – an estimated saving of roughly £176 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) – 38.8%
Cavity wall, as built, insulated (assumed) – 12.5%
System built, as built, insulated (assumed) – 7.5%

Recorded as having no wall insulation: 48.8%.

Roofs

(another dwelling above) – 15.0%
Pitched, no insulation (assumed) – 8.8%
(other premises above) – 8.8%

Recorded as having no roof insulation: 13.8%.

Glazing

Fully double glazed – 92.5%
Single glazed – 5.0%
Full secondary glazing – 2.5%

Main heating

Boiler and radiators, mains gas – 65.0%
Electric storage heaters – 8.8%
Boiler and underfloor heating, mains gas – 8.8%

Which streets need it most

See the streets in TW7 with the highest share of homes rated band D or below.

Leakiest streets in TW7

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