What do you put on new plaster before tiling?
Subsequently, one may also ask, do you need to plaster before tiling?
Tiling on plaster is ok, as long as your not fitting large format tiles. Still prime the plaster (obviously when dry) with acrylic primer. NOT PVA. Why plaster though..not really necessary.
Additionally, do I need to PVA plaster before tiling? Short answer. No, never use PVA to prime a surface before applying tiles. The acetic acid produced when cement and PVA come into contact would render the adhesive and grout useless.
Secondly, how do you seal a wall before tiling?
PVA can be used to seal any type of porous surface,including plasterboard and if it is done properly it will give you a much much better job than working on unsealed walls. To seal a wall the PVA should be dilted at about 20 - 25% PVA to 80 - 75% water.
How long after skimming can you tile?
Ideally leave new plaster (bonding plus finish) 4 weeks to dry before tiling. Dot and dab plasterboard with plaster skim can be tiled in 24/36 hours. If you don't skim the plasterboard you can tile it immediately but prime it first with an acrylic primer like BAL APD or SBR.