Any windows tile from centre of these.
Tiling onto plasterboard youtube.
Learn how to tile a bathroom with an instructional video from bunnings w.
You should not tile over wallpaper glossy surfaces lead paint or plywood.
Tiling onto plasterboard walls.
As for setting out centre your walls and walk tiles into corners to see what size of cuts you will have.
If you re not sure if you have lead paint test kits are available.
Dont use pva as the other guys have stated.
Let us know ansewers to the above 2 questions.
Preparation for tiling onto plasterboard plasterboard should be dry securely fixed and rigid with no protruding fixings with the face to receive decorative finishes exposed.
What size of tiles are you fixing to walls.
It should be a minimum 12 5mm thick when fixed to timber framing or battening and fixed in accordance with the manufacturers recommendations.
However tiling over tile can add quite a bit of thickness so make sure your wall can handle the weight.
Tile onto p b dont skimm it bring weight issues into tile fixing.