Cavity Wall Insulation

Buildings lose a large amount of heat through their walls, up to 30% in some cases. You can save money and energy by insulating wall cavities. The chances are that if your business is located in an older building the insulation will be minimal, so it is worth checking the amount it currently has.

For air-conditioned buildings, there’s another benefit too. Cavity insulation reduces solar thermal gain during the warmest months of the year and reduces the need for cooling.

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Cavity wall insulation can be used in any double-walled building, which have been constructed since 1920. The standard method is to drill 22mm diameter holes into the outer brickwork at intervals of 1m to 1.5m. Insulating beads, granules, loose fibre or foam are then blown into the cavity walls.

Advantages include:

• Up to a £150 per year saving on your energy bills for an office building with 200m² of cavity walls
• Payback of costs of six years, which is likely to increase due to rising energy costs
• Save around half a tonne of CO2 every year, increasing your company’s green credentials