Cavity Wall Insulation stores the heat within the inner walls, bouncing it back into the room and holding it for longer. This gives you a more even temperature and gets rid of the draughts that come down from the walls.
|Building||Detached||Semi detached||Mid terrace||Bungalow||Flat|
|Payback time||5 Years or fewer|
|Carbon dioxide saving per year||1,100 kg||650 kg||430 kg||450 kg||360 kg|