I'm all for insulating everything I can (including the 55mm cavity walls in my 1960's house with polystyrene beads).....................BUT...............whilst being effective, it probably aint as effective as what people assume.
2" of any insulation will only slow down heat loss, would anyone know by what percentage heat loss with filled cavities is reduced ? (with only 2" of insulation it won't matter very much which insulation material is used)
2" of any insulation will only slow down heat loss, would anyone know by what percentage heat loss with filled cavities is reduced ? (with only 2" of insulation it won't matter very much which insulation material is used)