I need help in coming up with a feasible solution for insulating the external walls on a 1940s brick home. My wife says someone told her that we can remove the gib from the inside and then putting in batts and then re-gibbing the walls. Guess somewhat like retrofitting a weatherboard home. An installer in NZ will pump in non-formeldehyde foam as the only approved insulation option for brick homes in NZ. I am however a bit wary of this foam thing as it claims to be able to let water drain through the foam.
Any of our members have managed to insulate the external walls of their old style brick home? Would appreciate your advice. Thanks.