What insulation adds in BR1
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 19671 certificates in BR1, the current rating of 61.4 could rise to about 75.8 out of 100. The estimated annual heating cost averages £826 now, and about £538 after the recommended work – an estimated saving of roughly £287 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) – 37.5%
- Cavity wall, as built, no insulation (assumed) – 27.5%
- Cavity wall, filled cavity – 12.5%
Recorded as having no wall insulation: 65.0%.
Roofs
- (another dwelling above) – 37.5%
- Pitched, 100 mm loft insulation – 17.5%
- Pitched, no insulation (assumed) – 15.0%
Recorded as having no roof insulation: 17.5%.
Glazing
- Fully double glazed – 76.0%
- Single glazed – 12.0%
- Mostly double glazing – 8.0%
Main heating
- Boiler and radiators, mains gas – 80.0%
- Warm air, mains gas – 5.0%
- Electric storage heaters – 5.0%
Which streets need it most
See the streets in BR1 with the highest share of homes rated band D or below.
Leakiest streets in BR1Keep exploring
Biggest average savings nearby
- What insulation adds in RM11 ~£463/yr average saving
- What insulation adds in TN14 ~£444/yr average saving
- What insulation adds in EC4Y ~£405/yr average saving
- What insulation adds in KT8 ~£391/yr average saving
- What insulation adds in N14 ~£379/yr average saving
- What insulation adds in RM4 ~£371/yr average saving
- What insulation adds in HA7 ~£342/yr average saving
- What insulation adds in CR3 ~£328/yr average saving