Cavity walls consist of two ‘skins’ separated by a hollow space. The walls are commonly brick or concrete block. This typical cavity wall construction was used in the UK from around the 1920’s with the initial cavity widths being very narrow (The properties with the narrow width cavity can be treated with our specialist Hard To Treat system) HTT, from the 1970’s onwards the introduction of cavity insulation was introduced and by the 1990’s cavity insulation became compulsory in the UK building regulations.
• House stock pre 1920’s – solid wall construction.
• House stock post 1920’s – narrow cavity walls slowly introduced.
• Between 1920’s and 1970’s UK house stock mostly built to include a cavity, with the cavity width slowly increasing.
• 1970’s onwards – possible chance of insulated cavity.
• 1990’s onwards – compulsory cavity insulation as per building regulations.
Please feel free to call us at our Preston branch and discuss your requirements, if you are in any doubt regarding your house cavity type we can arrange for a survey to be completed to assess your requirements and discuss possible funding options. Although we are based in Preston our HTT teams work throughout the UK and Scotland completing Hard To Treat cavities nationwide.