What insulation adds in IG4

63.2 → 77.5

Rating, now → potential

+14.2

Average uplift

£246

Avg saving / yr

2772

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 2772 certificates in IG4, the current rating of 63.2 could rise to about 77.5 out of 100. The estimated annual heating cost averages £858 now, and about £612 after the recommended work – an estimated saving of roughly £246 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) – 67.5%
Cavity wall, as built, no insulation (assumed) – 12.5%
Cavity wall, as built, insulated (assumed) – 10.0%

Recorded as having no wall insulation: 82.5%.

Roofs

Pitched, no insulation (assumed) – 27.5%
(another dwelling above) – 27.5%
Pitched, 270 mm loft insulation – 7.5%

Recorded as having no roof insulation: 27.5%.

Glazing

Fully double glazed – 90.9%
Mostly double glazing – 9.1%

Main heating

Boiler and radiators, mains gas – 80.0%
Electric storage heaters – 10.0%
Warm air, mains gas – 5.0%

Which streets need it most

See the streets in IG4 with the highest share of homes rated band D or below.

Leakiest streets in IG4

Keep exploring

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