Helping UK homeowners save money on their heating

Cavity Wall Insulation – One of the cheapest and most effective home improvements


Most UK homes that have been built since the 1920s have cavity walls. These external walls consist of two layers of brick with a gap or cavity left between them. By filling this cavity with insulating material, you can greatly reduce the amount of heat which is lost through the walls of your home. Cavity wall insulation is one of the most simple and cost efficient ways of insulating your home, saving the average home 15% on energy bills. This works out at around £90 per year and will reduce carbon emissions by 750kg annually.

It is estimated that around a third of the heat in your home may escape in this way, so by insulating the cavity walls you stand to make large savings on your home energy bills. Not only will it save you money but also it regulates the temperature within your home, retaining heat and keeping you warm during the cold winter months and keeping you cool during the summer. cavity wall insulation will also help prevent condensation gathering on the walls of your home and put a stop to any instances of rising damp. Another advantage is how well it acts as soundproofing!

Installing cavity wall insulation is a simple and quick job which can be carried out by a skilled technician at a reasonable cost. The gap between the walls is injected with insulating material, usually foam, polybeads or rock wool, through a series of holes, which are drilled into the walls from the outside. For an average size semi-detached house the process will usually only take around 3 hours and leaves no mess either inside or outside the home.

The average cost of cavity wall insulation is around £500, but with the savings you will make on your annual heating bills, it should pay for itself in around 5 years.

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