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Cavity Wall Insulation

If your home was built after 1930, the chances are that its external walls are made of two layers with a gap or cavity between them. Cavity wall insulation fills that gap, keeping the warmth in to save energy.

Your home will usually be suitable for cavity wall insulation if:

  • Its external walls are unfilled cavity walls
  • Your cavity is at least 40mm wide
  • The masonry or brickwork of your property is in good condition
  • It is more than ten years old (most newer houses will have insulation already)

To insulate your cavity walls, we drill small holes around 22mm in diameter at intervals of around 1m on the outside wall of your home. With specially designed equipment, we then blow insulation into the cavity. Once all the insulation is in, we fill the holes in the brickwork and mortar joint so you’ll barely notice them. You will also receive a 25 year CIGA Guarantee.

Filling cavity walls is not a job you can do yourself: you need to be a registered installer. We can do the job in around two hours for an average house with easily accessible walls; it should be simple, quick – and make no mess.

If you have any damp patches on your internal walls then they should not be insulated until the problem is sorted out. You should speak to a builder who specialises in damp prevention.

At the end of the installation, Heat Insulation Ltd will apply for your independent 25 year C.I.G.A. Guarantee to ensure, in the unlikely event of a problem, any issues will be rectified quickly and easily.