Table 1.3: Number of Green Deal Assessments by tenure, up to 31st December 2013, Great Britain Tenure Deal Assessments Valid Percentage of Assessments1 96,553 75 Rented (private) 15,891 12 Rented (social) 16,656 13 Unknown 742 - Total 129,842 100 1 Percentage of Assessments is calculated only for those Assessments where tenure is known. Table 1.4: Number of Green Deal Assessments by whether property is on or off the Mains Gas Grid, up to 31st December 2013, Great Britain Properties by whether on or off Mains Gas Grid Green Deal Assessments Percentage of Assessments Off Gas 16,465 13 On Gas 113,377 87 Total 129,842 100 Table 1.5: Number of improvements recommended in Green Deal Assessments by measure type (grouped), up to 31st December 2013, Great Britain Measure Types Number of improvements recommended 1 Percentage of improvements recommended Boiler 45,247 13.2 Cavity Wall Insulation 45,102 13.2 Loft Insulation 51,349 15.0 Micro-generation 55,538 16.2 Other Heating 34,060 9.9 Other Insulation 64,650 18.9 Solid Wall Insulation 36,231 10.6 Window Glazing 10,138 3.0 Total 342,315 100 1 More than one improvement can be recommended per Assessment. On average, are around two to three improvements recommended per Assessment. Table 1.5a: Number of improvements by measures recommended in Green Deal Assessments, up to 31st December 2013, Great Britain
232,000 had wall insulation (3 per cent of properties with solid walls) (Chart 2.1). It should be noted that measures installed as a mitigation action (see page 29) after the end of CERT and CESP are not currently included in these figures, and therefore actual delivery during 2013 is likely to be higher than reported in this document. Chart 2.1: Percentage of properties with insulation in Great Britain Table 2.1: Insulated homes in Great Britain, March 2008 to December 2013 (Thousands) Cavity wall insulation Loft insulation >=125mm Solid wall insulation Mar 2008 10,030 10,150 65 Mar 2009 10,760 10,930 74 Mar 2010 11,490 12,450 94 Mar 2011 12,090 13,540 102 Mar 2012 r 12,750 14,770 132 Dec 2012 r 13,320 16,110 204 Mar 2013 r 13,360 16,160 205 Jun 2013 r 13,430 16,220 209 Sep 2013 r 13,510 16,270 217
** Not all remaining potential properties could be insulated and some which could be insulated would not be cost effective to insulate. This could be due to properties being hard to treat, having limited potential to save energy or being unfillable. Chart 2.6: Remaining potential to insulate the housing stock in Great Britain, December 2013 Table 2.3 and Chart 2.5 show that just over two thirds of properties with cavity walls and properties with a loft are insulated. In comparison only 3 per cent of properties with solid walls are insulated. The following section gives further information on the remaining potential to insulate the housing stock in Great Britain, by insulation type. Cavity wall insulation It is estimated that at the end of December 2013 there were 5.1 million cavity wall properties which could benefit from some cavity wall insulation (27 per cent of homes with cavity walls). Of 1.4 million are considered to have limited potential (0.5 million of this 1.4 million are also considered hard to treat) and 3.7 million are totally uninsulated (3.0 million of the 3.7 million uninsulated properties are considered hard to treat). There are therefore 0.7 million easy to treat, standard cavities remaining. Historical figures and a more detailed breakdown is available in Table 2.6 of the accompanying . Loft insulation In this publication lofts are defined as insulated if they have 125mm or more of insulation. Lofts with less than 125mm of insulation are defined as uninsulated as they would benefit most from top up insulation. At the end of December 2013 it is estimated that there were 7.3 million uninsulated lofts (31 per cent of homes with lofts). Of these 1.7 million are considered to be hard to treat or unfillable