Cavitech UK provide a range of insulation services for domestic and business properties of all sizes anywhere in the UK.

Cavity Wall Insulation

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What’s the Benefits of Cavity Wall Insulation?


Heat Loss

Not only is effective cavity wall insulation good for your home, it is good for your pocket and good for the environment.

Installing cavity wall insulation is probably the most effective energy saving step you can take. After all, 6 million home owners can’t be wrong!

It is a widely know fact that up to 35% of heat loss in a home can be through the external walls. By installing insulation you will save on your heating costs for many years to come.

Your carbon footprint will also be significantly reduced as a result, producing far less Carbon Dioxide.

Around 5 million homes still have empty cavities that could have cavity wall insulation installed, allowing the occupants to enjoy a warmer and cheaper to heat house. Various Grants and schemes are available to help with the cost, so there really is no reason not to benefit.

What Is Cavity Wall Insulation?


Grey Bead Insulation

Most homes built since the 1920’s have cavity walls, i.e. an inner and an outer ‘skin’ with a gap between them. Filling this gap with insulation material improved the retention of heat on the inside of the property.

Methods to insulate your cavity walls:

  • Whitewool cavity wall insulation is a mineral fibre
  • Expanded Polystyrene Beads (EPS) are a high performance, injected, blown grey bead

Polystyrene beads are completely waterproof, so even if they do get wet, they will dry out without any lasting damage or adverse affect on your insulation.

Is My Property Suitable for Cavity Wall Insulation?


Cavity Wall Insulation

If your property was built after the 1920’s, you almost certainly have cavity walls. Older houses are more likely to have solid walls.

Your home will usually be suitable for cavity wall insulation if it meets these criteria:

  • Its external walls are unfilled cavity walls.
  • Your cavity is at least 50mm wide.
  • The masonry or brickwork of your property is in good condition.
  • It is more than 10 years old (most newer houses will have insulation already).
  • The walls are not exposed to driving rain.

Contact us today so we can check the condition of your current masonry or brickwork, and any existing insulation if it exists.

How Cavity Wall Insulation Is Installed?


You’ll need a registered installer to fit cavity wall insulation – it’s not a job you can do yourself.

The insulation material is injected through small holes drilled in the exterior brickwork. Once the installation is complete we make good all brickwork, blending in the installation work to retain the look of your property.

Cavity walls are filled with an insulating material; commonly-used materials include mineral wool, polystyrene beads or foam. Insulating cavity walls will help trap heat and prevent warmth from escaping.

A typical installation usually takes less than half a day.

How Much Does Cavity Wall Insulation Cost?


The average cost of cavity wall insulation can be difficult to determine.

We tend to price each job on an individual basis, as the scope of the required work can vary, especially as we take on jobs of any size.

Although looking at data from the Energy Saving Trust you could save up to £275 a year by insulating cavity walls. Work out the potential savings for your property using the table below.

Type of property Installation cost Savings per year CO2 savings per year (kg) Payback time
Detached house (four bedrooms) £720 £275 1,100 2-3 years
Semi-detached house (three bedrooms) £475 £160 650 3 years
Mid-terrace house (three bedrooms) £370 £105 430 3-4 years
Detached bungalow (two bedrooms) £430 £110 450 4 years
Mid-floor flat (two bedrooms) £330 £90 360 3-4 years

Figures based on a typical gas-heated home. All data obtained from the Energy Saving Trust (EST).

Cavity Wall Insulation Services


All of our work is guaranteed, and is carried out by qualified professionals. We also extract and remove insulation that’s damp and causing problems, and replace/install loft insulation.

  • The best qualified teams in the UK
  • A guideline price over the telephone where possible
  • Free help and advice in diagnosing cavity wall problems
  • Detailed surveying capability (which may include thermal imaging and moisture monitoring where required)
  • Certificate provided on completion of work