I had my extension sheeted with plasterboard and plastered. Previous to this the plumber who was fitting a radiator had run the pipes from upstairs down into extension and arranged to come back once it was plastered to finish the job. When he returned and turned on the water,it poured down two sides and ceiling of room. A joiner must have put a screw through one of his pipes. This was 3 days ago and it now looks dry. Is it ok to leave it or should it be replaced ??