§ Mr. Cartwrightasked the Secretary of State for Energy what is his estimate of the total annual energy savings likely to be achieved by a programme of insulation of homes in the United Kingdom.
§ Mr. ArmstrongI have been asked to reply.
We estimate that between 5 per cent. and 10 per cent. of domestic energy consumption can be saved nationally by the use of currently available techniques in 27W those existing dwellings where these have not already been applied.
§ Mr. Cartwrightasked the Secretary of State for Energy what is the estimated capital cost of installing adequate thermal insulation in (a) a new and (b) an existing three-bedroomed semi-detached house; and what are the estimated annual savings resulting from such insulation.
§ Mr. ArmstrongI have been asked to reply.
The capital cost of insulating a new, three-bedroomed semi-detached house to current building regulation standards is approximately £50. The saving in energy consumption achieved in comparison with the previous standard is estimated at around 15 per cent. To install 50mm of loft insulation in a similar, existing dwelling would also cost about £50. This could result in savings of up to 15 per cent.