Hi All,I am due to be tiling a bathroom, it had 3 walls that were plasterboard with plaster skim and one that was masonary, plaster and skim. All had existing tiles that had been up years.I agreed to take the existing tiles off for the customer on the basis that they would need some remedy works after. Once the tiles had come off the plasterboard was left quite damaged, so suggested that it would probably be easier to replace all with new plasterboard and tile straight on to that, I was thinking I would tank over the bath where the shower was going to go.The new bath is in and plasterboard has been changed but they have put a finishing skim over the bath area and the masonairy wall has been plastered.2 questions1, can I tile directly onto the bonding plaster on the masonary wall (I am thinking not) but if so how long do I need to wait?2, How long do I need to wait for the skim on the plasterboard over the bath to cure before I can tile (It doesnt look very thick)?The guys that are doing the bathroom have been kind and left the sink, toilet and shower out to make the tiling easier, but the customer is obviously keen for me to get started asapAny help greatly appreciated

1. No you shouldnt tile onto a bonding coat, it isnt strong enough to support the weight of tiling.
2. You should wait for 4 weeks before tiling onto plaster.
Any new plaster, let it dry naturally, prime with a tilers primer not pva, then tile with a cement based adhesive.