Cavity Wall Insulation
Cavity wall insulation is going to be one of the big players in the Green Deal. It’s relatively cheap to install and the return on investment is quick. Around a third of heat loss in domestic properties goes straight through the walls.
Most houses built after 1920 will have a cavity between the outer wall, usually brick and the inner wall, blocks or more bricks. By using internal and external wall insulation, it is possible to make great savings on your heating bills. Without the cavity filled you are effectively heating the outside of your property, which is never an effective idea.
Installing insulation into the cavity is a quick and simple process in the majority of cases. A qualified installer will inspect the property and make the decision about which material to use in each particular case. There are three main types of material to use:
- Foam Insulations
- Mineral Wool
- Granules or Beads
Once the inspection has been made and the correct material chosen, it’s normally just a matter of drilling some holes into the outside walls of the property and blowing in the insulation. The small drill holes are then filled and the insulation will start to have immediate effect.
Costs of an average installation would be between £100-£350 and the savings each year at current prices would be in the region of £135 per year. This is why cavity wall insulation will be one of the main technologies promoted in the Green Deal as it fits the ‘Golden Rule’ very well.