Leakiest streets in TW9

57.4%

Band D or below

13581

Certificates

65.8

Average rating

£153

Avg potential saving / yr

What this means

Across 13581 energy certificates in TW9, 7793 (57.4%) are rated band D or below. The average current rating is 65.8 out of 100, which the recommended improvements on those certificates would lift to about 76.3. The average estimated annual heating cost is £575, falling to about £422 after the recommended work – a saving of roughly £153 a year.

A B C D E F G

A 0.7% B 8.2% C 33.7% D 36.0% E 16.8% F 3.7% G 0.9%

Every figure is computed across the certificates in this area – no individual property is identified or listed.

How TW9 compares

Set against the average across the 3,339,357 energy certificates in our dataset (average current rating 67.8, with 51.7% band D or below):

Band D or below here is 57.4%, 5.7 points higher (leakier).
The average current rating here is 65.8, 2.0 points below the wider-dataset average.

Indicative comparison against the certificates we hold, not an official national statistic. Check the official source for area statistics.

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) – 52.5%
Cavity wall, as built, insulated (assumed) – 15.0%
Timber frame, as built, insulated (assumed) – 7.5%

Recorded as having no wall insulation: 60.0%.

Roofs

(another dwelling above) – 37.5%
Pitched, no insulation (assumed) – 10.0%
Flat, insulated (assumed) – 7.5%

Recorded as having no roof insulation: 10.0%.

Glazing

Fully double glazed – 63.6%
Single glazed – 9.1%
Some multiple glazing – 4.5%

Main heating

Boiler and radiators, mains gas – 67.5%
Electric underfloor heating – 15.0%
Room heaters, electric – 5.0%

Retrofit measures for this housing stock

Based on the construction recorded on the certificates here, these guides cover the measures that most often apply, with typical UK costs and savings cited to public sources.

All retrofit guides

What insulation adds in TW9

See the average current-to-potential uplift and the estimated heating-cost saving for this area.