trowel size bathroom floor - Tile Advice

[Daniel s]

Hi all, what size trowel should i use for 600x150 porc floor tiles - 10mm thick. going onto plywood bathroom floor using mapei super flexi adhesive. Plywood has been tanked with weber tanking kit. Thanks!

 

[acaciaguy]

You shouldn’t tile on plywood. You need to use a suitable tiler backer board.

 

[Daniel s]

Acaciaguy thanks for reply. Could you expand on that at all? It’s in a downstairs bathroom, thick ply on joists and suitably screwed down and then taped and tanked. If I was to use hardibacker too what benefit would it give in terms of floor movement or waterproofing. Any advice appreciated