Tiling Bathroom Floor

[ajsaville]

Need a bit of advice on tiling my bathroom floor.The surporting joists are 4inch by 2inch and 16inch's apart at there centres.The floorboards are 4 & 1/2 inch's wide bye 3/4 inch.I was going to use 6mm hardiboard to strengthen.I know i need to screw the hardiboards down but do i need to stick it down aswell or could i over ply with 12mm wbp plywood.Any advice would be most welcome.

Alan,

 

[White Room]

If there is'nt any noggins between the joists, fix some. I would use 18mm ply just for some extra strength

 

[Eddie]

Then stick the boards down with a flexible cement based adhesive (not no more nails / gripfill etc.!!), a 6mm trowel will be okay.

I've never heard of anyone using adhesive, between ply, and floorboards before. Never done this myself.

 

[Richardk]

What about 6mm No More Ply. Their instructions say use two beads of their Megastrength glue then screw down using 8 screws per sheet. Anyone done it this way? Any comments?