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||3 Years or fewer|
|Carbon dioxide saving per year||1040kg||600kg||395kg||410kg||325kg|