Hi all, can anyone advise on the best way to damp proof a solid stone wall which now forms an internal wall to my newly built extension - to protect against a) damp maybe moving downwards from the exposed part above the new roofline, and b) rising damp at the bottom of the wall I thought about hanging a sheet of DPM over the whole thing and plasterboarding onto battens - is this a bit mad/ overkill? i'm not really a fan of chemical injection DPCs thanks in advance jon