Just looked at a bungalow which is non standard construction (and cheap because of it, and cash only). Its basically cast concrete panels for walls. No insulation. The rest of the building is pretty standard. Below dpc is brickwork and the the roof is pitched and tiled. What would it take to make it standard? Obviously it needs some insulation adding and the best way I can think of is exterior celotex then a render but while that would make the house 'work' it'll still be a bit non standard. Would and exterior skin of brick/block to make a cavity wall be any better or do the concrete panels need replacing with block standardise it?