laying bathroom floor tiles onto floorboards - depth issues

matt_boro

hi there,

bathroom and hallway outside are both currently back to floorboard (same level).

ive read that to tile onto bathroom floor you should first put down 12mm ply... with the tiles on top this will add about an inch overall i would imagine?

im planning on fitting carpet + underlay to the hallway outside.

what will the height of the carpet and underlay in the hallway be like compared to the height of the bathroom floor with ply and tiles?

will there be a noticeable step up?

Thanks
Matt

Little_Vics

we've just done the same and there is no noticeable step once you take the gripper rod between the two into account. There might be a mathematical one, but I don't notice it.

emmas42

You can get tile backer boards that are only 6mm thick that will do the job instead of 12mm ply. It can help if you have concerns about the height of the finished floor.

amarg

You can have an hardwood "ramp" made to ramp up from the old floor level to the new level. There might be a technical term for them, but it's basically a block of wood that is planed to a wedge shape.

andyhop

6mm hardibacker glued and screwed will be fine if you use a s2 adhesive and the original floor boards are well secured

I would have ripped the floor boards up and replace with 25mm plywood

And BS state 18mm plywood minimum for overboarding, If your use natural stones etc then i would step up to this