A large number of properties that had the insulation installed by successive UK government-backed schemes were installed incorrectly or were unsuitable for the property. Incorrectly installed cavity wall insulation (CWI) causes water to seep into a property's walls, causing structural problems and damp patches that may also manifest into mould.
Many properties with insulation work done by various UK government-supported initiatives were improperly installed or not suitable for their structures. Improperly set cavity wall insulation (CWI) permits water to enter the walls of buildings, causing structural problems and dampness that could lead to mold growth.