I am thinking of getting my cavity walls insulated as my house is pretty cold and I read that ~35% of a house's heat can escape through the walls. However, how do I know if the walls were not built originally with some form of insulation? Is there a simple method or do I need to start drilling holes!? And, even so, is it still advisable to get the insulation 'topped-up' with a more modern insulator? Also, anyone got a rough estimate as to how much insulating the walls will cost?
(I bought my house recently but it was built in 1990. It is ~1600sq feet. The attic is well insulated but the house only has single-glazed windows...my next task after the walls!)
Thanks
(I bought my house recently but it was built in 1990. It is ~1600sq feet. The attic is well insulated but the house only has single-glazed windows...my next task after the walls!)
Thanks