What insulation adds in CR6

69.8 → 81.1

Rating, now → potential

+11.3

Average uplift

£155

Avg saving / yr

142

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 142 certificates in CR6, the current rating of 69.8 could rise to about 81.1 out of 100. The estimated annual heating cost averages £639 now, and about £484 after the recommended work – an estimated saving of roughly £155 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

Cavity wall, as built, no insulation (assumed) – 20.0%
Solid brick, as built, no insulation (assumed) – 17.5%
Cavity wall, filled cavity – 17.5%

Recorded as having no wall insulation: 37.5%.

Roofs

Pitched, 100 mm loft insulation – 27.5%
Pitched, 150 mm loft insulation – 10.0%
Average thermal transmittance 0.14 W/m²K – 10.0%

Recorded as having no roof insulation: 0.0%.

Glazing

Fully double glazed – 87.5%
Partial double glazing – 6.2%
Mostly double glazing – 6.2%

Main heating

Boiler and radiators, mains gas – 77.5%
Boiler and underfloor heating, mains gas – 15.0%
Ground source heat pump, radiators, electric – 7.5%

Which streets need it most

See the streets in CR6 with the highest share of homes rated band D or below.

Leakiest streets in CR6

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