Alright guys, I,m having a ding dong with a joiner on a renovation i,m on just now problem is he wants to gyproc straight on to old channell lining i said no way, the developer said it,s down to us but i know that if you gyproc on to the lining then skim over the moisture when drying out will expand and contract the lining causing hair line cracks, i know i,m right here but a bit of back up and i,ll gladly print the posts off and show it to th vajina sorry joiner on monday Cheers ;D ;D ;D