I have purchased a 1970's bungalow with hideous brickwork and some even worse Bradstone cladding. I would like to renew all the external brickwork and cladding. The walls all have a 50mm cavity and I would propose increasing the cavity to 80mm. I would be tying the new external walls to the internal concrete blockwork and fitting the necessary insulation in the new cavity.
Any replies would be gratefully appreciated.