Mould inside home caused by incorrect insulation Over 300,000 UK homes insulated under government-backed schemes are now reported to need repairs. A lot of these properties are older, solid wall homes. And when a solid wall home starts showing damp, condensation and mould after insulation work, it’s not just annoying  it can be expensive to put right. If you live in a solid wall home, you’ll know the battle is real: cold walls, black spot mould, musty smells, peeling paint,