Question to the Ministry of Housing, Communities and Local Government:

To ask Her Majesty's Government, further to the Written Answer by Lord Bourne of Aberystwyth on 14 May (HL15410), why the building regulations do not take account of the contribution of glass cladding to global warming.

The Building Regulations set minimum energy performance standards for new homes and non-domestic buildings. The principal way that developers demonstrate compliance is through a whole building energy calculation. For a new building, the properties of the glazing and façade would be taken into account in the calculation of overall energy performance and therefore the carbon emissions from the building.