Tiling the side of bath - Tile Advice

[tdrgreaves]

I’m tiling around a bath. The backing board is ply and is slightly wobbly. Should I secure it before I start tiling? The trouble is if I secure it then it’s not level as the bottom of the backing board sticks out slightly. If I leave it slightly wobbly then I will get a straighter finish...but then it isn’t 100% secure. Any advice would be much appreciated. Thanks, Tom

 

[Deleted member 54066]

Ply 😳
Remove it completely or it will end in tears

 

[Boggs]

Get yourself a Wedi bath panel and throw the ply away. 👍