My bare bathroom floor is half floorboards and half concrete slab

[Guest]

-Could anyone please advise what the tiler should use underneath the tiles when laying them?

Is a floor-leveller such as Arditex sufficient or is cement sheeting needed?

I’m concerned that cement sheeting will raise the floor height higher than the hallway.

[Dan]

Pull the floor boards up, replace with cement sheeting, then screed over sheeting and slab to create desired falls.

[Aaron]

bedding is always going to raise the hieght…rather than having a step up ask your tiler to ramp up at the doorway instead.

If the floor was to stay at the level of existing areas you would probably need a hob for your shower.