§ 13. Mr. Ron DaviesTo ask the Secretary of State for Energy what is his latest estimate of the amount of energy that would be saved by the implementation across the United Kingdom housing stock of the recommendation of the Building Research Establishment on the thickness of roof insulation.
Mr. Peter MorrisWhere loft insulation is one inch or less, installation of an extra four inches could lead to an annual energy saving of some 0.73 million tonnes oil equivalent. However, householders are likely to want to opt at least in part for greater warmth rather than simply saving energy.
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§ 45. Mr. Ray PowellTo ask the Secretary of State for Energy what is his latest estimate of the tonnes of oil or coal equivalent that would be saved if 10 inches thickness of roof insulation were installed in every domestic property in the United Kingdom.
§ Mr. Peter MorrisonIt is estimated that installation of 10 inches of insulation in all domestic buildings with accessible lofts would lead to a potential annual saving of 2.6 million tonnes of coal equivalent (1.5 million tonnes of oil equivalent). However, insulation to that thickness would not be cost effective.