Insulation Frequently
Asked Questions

Cavity Wall Insulation FAQs

What is a cavity wall?
Most modern houses have two external brick walls with an air-gap in between them. Although air acts a natural insulator, it is not as effective as the insulation material now used to insulate houses.

How do I know if I have cavity walls?
If your house was built after 1920 it is very likely that it has cavity walls. It is possible older properties could have a cavity – Please contact us for a FREE survey. An easy way to tell is to measure the thickness of your external walls by looking at a window or doorway. A cavity wall will be at least 260mm thick.

What is cavity wall insulation?
Properties that have a cavity in between could be suitable to be insulated.  Cavity wall insulation fills that gap, keeping the warmth in to save energy. It can also help reduce condensation inside the house if this is a problem stemming from your external walls.

Why is it free?
The government have committed to a target of cutting carbon emissions by 80% by 2050. One of the simplest ways to do this is to reduce the amount of energy we use in our homes. At the moment, the government have made funds available to qualifying households to insulate any house with cavity walls for free. If your cavities are empty, We will fill them.

I have cavity walls — how do I know if they are already insulated?
Houses built from the 1990’s onwards were meant to be built with insulation material in the cavity wall, however properties built up to 2005 are still found to have been built without insulation. If your house was built between 1930 and 2005, and none of the previous owners have had insulation installed, it probably has empty cavity walls. If you are unsure, one of our trained surveyors can inspect your walls.

How is the insulation installed?
Our installers J&J Crump & Sons will drill a few small holes (22mm) into your outside walls, in the mortar between the bricks. A machine is then used to inject the insulation material into the walls. Once the process is complete, the holes are filled.

How long does it take to install?
For a typical 3 bedroom semi-detached house, the installation will take 2-3 hours.

How long will the insulation last?
For the lifetime of the building, as stated by the British Board of Agrément.

I rent my house — can I still get free insulation?
Please contact us on 0800 7833127 so we can discuss your individual needs.

Loft Insulation FAQs

What is loft insulation?
Loft insulation is made from man-man mineral fibre usually made from silica sand, and has a wool-like appearance. It is supplied in rolls sealed in plastic packaging.

How long does loft insulation last for?
Loft insulation does not require any maintenance and should last indefinitely.

Why is it free?
The government have committed to a target of cutting carbon emissions by 80% by 2050. One of the simplest ways to do this is to reduce the amount of energy we use in our homes. At the moment, the government have made funds available for certain households to have their home insulated for free.

How long does it take to install?
A typical loft takes around 1 – 2 hours to insulate.

I rent my house — can I still get free insulation?
Please contact us on 0800 7833127 so we can discuss your individual needs.

Boiler Installation FAQs

Will I be eligible for a free boiler?

  • You will need to own your own home.
  • Your current gas boiler must be broken.
  • You may be eligible for a free gas boiler if you are on certain benefits, however, this depends on how much funding the survey on your property generates;

Benefits that may qualify are;

Please contact us on 0800 7833127 to see if the benefits you receive qualify

Find out if you’re eligible for our Free insulation improvement scheme…