Am going ahead with this in a weeks time,thanks for all the advice. i plan to studd off in 3x2 cls, with dpc stapled to studd before fixing to wall,infill between studs with 50mm celotex insulation boards,cover over the studds with vapour barrier and finish with plasterboard. Do i need to use treated timber for the studwork, and last question,should ther be a gap between celotex and brickwork. Going to order everything from Wicks for delivey asap.
Thanks to all
Thanks to all