What insulation adds in W1T

64.8 → 75.5

Rating, now → potential

+10.8

Average uplift

£156

Avg saving / yr

2472

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 2472 certificates in W1T, the current rating of 64.8 could rise to about 75.5 out of 100. The estimated annual heating cost averages £486 now, and about £330 after the recommended work – an estimated saving of roughly £156 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) – 52.5%
Cavity wall, as built, partial insulation (assumed) – 7.5%
System built, as built, no insulation (assumed) – 5.0%

Recorded as having no wall insulation: 62.5%.

Roofs

(another dwelling above) – 52.5%
Flat, no insulation (assumed) – 7.5%
(other premises above) – 7.5%

Recorded as having no roof insulation: 17.5%.

Glazing

Fully double glazed – 45.0%
Single glazed – 40.0%
Some double glazing – 5.0%

Main heating

Boiler and radiators, mains gas – 55.0%
Room heaters, electric – 20.0%
Electric storage heaters – 7.5%

Which streets need it most

See the streets in W1T with the highest share of homes rated band D or below.

Leakiest streets in W1T

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