The survey results, published on Tuesday, showed 38% of residents complained about insulation, 32% want to replace doors and windows, 29% want improvements to their roof, and 11% want a heating upgrade. 

According to the survey, doors and windows have been replaced in 1.2 million homes, or about 27% of the total in the past ten years, but they are in need of replacement in a further 28% of homes.

Insulation has been added to the walls of about 17% of homes, but almost 30% of homes still need to be reinsulated.

About 84% of residents said they cannot afford to renovate, while 7% said they are waiting for subsidy money.