49 Roehampton Close

What the assessor found

Each part of the home, with the certificate's own energy efficiency rating.

• Walls

  Solid brick, as built, no insulation (assumed)

  Very poor

• Roof

  Pitched, 150 mm loft insulation

  Good

• Floor

  (other premises below)

  Not rated on the certificate

• Heating

  Boiler and radiators, mains gas

  Good

• Heating controls

  Programmer, room thermostat and TRVs

  Good

• Hot water

  From main system

  Good

• Lighting

  Low energy lighting in 11% of fixed outlets

  Poor

• Second heating

  Room heaters, mains gas

  Not rated on the certificate

The assessor's estimates at the energy prices in use when the certificate was made (2014), for a typical household. Today's bills will differ.

Improvements the certificate recommends

In the certificate's order. Each rating assumes the steps before it are done.

1. 1

   Increase loft insulation to 270 mm

   Typical cost £100–£350 · saves about £49 a year

   Rating after53E
2. 2

   50 mm internal or external wall insulation

   Typical cost £4,000–£14,000 · saves about £632 a year

   Rating after70C
3. 3

   Draught proof single-glazed windows

   Typical cost £80–£120 · saves about £21 a year

   Rating after71C
4. 4

   Low energy lighting for all fixed outlets

   Typical cost £40 · saves about £54 a year

   Rating after72C
5. 5

   Replace boiler with new condensing boiler

   Typical cost £2,200–£3,000 · saves about £90 a year

   Rating after75C
6. 6

   Replace single glazed windows with low-E double glazed windows

   Typical cost £3,300–£6,500 · saves about £64 a year

   Rating after77C

Costs and savings are the certificate's own, as estimated when it was made.