hi guys i am a plasterer and recently done a local renevation job on a bungalow all walls and cielings were half moon artex and were very old and yellow as it was a smokers house and had not been painted for a very long time all walls and ceilings were sound so i cleaned most of the tar off pva glued them thistle bonding them then pva again and then plaster using multi finish. everything was ok all dried ok the painter has painted all rooms and in 2 rooms the plaster and bonding has fell off in sheets i do not want to repair until i know the cause as i have been plastering for 10 years and have never seen this happen before any advice would be good thanks.