Andrew Legge, CEO of Havelock Wool, a company that produces natural, sustainable building insulation made from wool, explains that a thin wall has a maximum thickness of 4.5 inches. It is typically ...

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The insulation is blown into the wall cavity from the outside of your property through drilled holes. The holes are then filled in to match your brickwork. Cavity wall insulation normally takes around ...

Wall insulation acts as a blanket that prevents heat from escaping ... Injected polystyrene beads to wall, cavity width 100mm. Making good all holes on completion. Data copyright RICS 2024, reproduced ...