Almost all external insulation fitted under Tory scheme needs repair or replacing, report finds

The ECO and GBIS initiatives sought to tackle fuel poverty and reduce carbon emissions across Britain. Photograph: Jose Miguel Sanchez/Alamy

Almost all the external insulation fitted under the previous government’s energy efficiency scheme was installed so poorly it will have to be repaired or replaced, an investigation has found.

Thousands of homeowners who took advantage of the home insulation schemes have been left with incompetently fitted cladding that in some cases is likely to cause damp and mould.