Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, what assessment his Department has made of the impact of (a) wrongfully installed and (b) defective cavity wall insulation on the energy efficiency of homes.

Cavity wall insulation is one the most cost-effective energy efficiency measures, saving up to £300 a year on occupants’ energy bills. However, Government recognises that there are instances of cavity wall insulation being defective or installed in unsuitable homes which may reduce its energy efficiency performance.

As part of the work on the Government’s Warm Homes Plan, we will set out our approach to consumer protection when issues arise with insulation.