§ Mr. Ormeasked the Secretary of State for the Environment what proportion of houses in each housing tenure have (a) loft insulation to the recommended thickness, (b) central heating, (c) cavity or solid wall insulation and (d) double glazing.
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§ Sir George YoungThe information requested is as follows:
Proportion of total number of houses in tenure group with: Owner occupied Per cent. Local authority Per cent. Private rented Per cent. Loft insulation* 100mm or more 34 18 12 at least 75mm 55 36 21 at least 50mm 69 48 27 Central heating† 77 59 40 Wall Insulation‡ (cavity wall and solid) 12 10 5 Double glazing more than 80 per cent, of glazing double glazing 42 5 11 some double glazing 15 1 1 * The recommended minimum thickness has varied with changes in the building regulations and also varies with the thermal properties of the insulation material concerned. It is now about 100mm. † Central heating includes partial systems and electric storage heaters. ‡ Wall insulation is almost entirely cavity wall insulation. All the data, with exception of the element of solid wall insulation, are derived from the audits of Great Britain survey undertaken at the end of 1984.