Removing concrete slab, if you remove the slab, you would need to replace with same thickness to maintain standards. When we remove a slab we replace with Scyon , however one needs to add joists , construct to be 40 mm lower and you can have a level finished floor, Labour and materials after you remove the slab $ 1500 - $ 2000 Depending on how $ you want to spend, possibly, have tiler lay tile bed on existing and step up to ensuite, many consider an ensuite worth a step up, run a strip of timber say 30 mm x half the depth of the step up at the step up. Ken Evers

I would recommend going a darker colour too! We have done it several times with clients who (like yourself) can't see what the finished concrete aggregate will look like until afterwards and the darker the better we have found. Like Zaffa said, it would be amazing if you could extend the concrete into the bathroom, as that can be absolutely beautiful and this aggregate look is a fantastic addition to a bathroom. However if you want to break it up I would go for a dark charcoal (large format) tile so you don't risk clashing colours. Darker bathrooms are really stylish so you don't risk sacrificing on style. Don't hesitate to contact me if you need any help selecting specific tiles as we know how overwhelming it can be and are happy to help. Best of Luck, Jordan from JFI Studios!

Is the concrete slab the size of the whole bathroom , or just the new shower area , or just the old shower size ? And where is the drain , especially in relation to the shower head ? Or are you going to bore a new one ? It is therefore maybe possible , depending on the existing floor , to lay a concrete overlay , or even a tileable tray , with a suitable 'fall' to the corner . A tray ensures no leaks , and is often easier to seal against the wall and the glass side wall too . It would probably be 25-30mm taller at the 'open' end , but I'd actually do a cedar or similar raised slat 'mat' area outside the shower to disguise the step or hob .

A fair comment Dreamer. I am still looking at putting a drain in but thinking i don't need to slope the tiling that i'll get put in. I know the regs state a particular drop for the tiles to provide a slope going to the drain BUT from what I can see the requirement for a drain is only mandatory if the room is upstairs or has the potential to damage adjacent properties. Putting a drain in is no issue having spoken to the plumber. Sloping the tiles is an issue if it gets to the point of having to cut the concrete slab to form a drop The plumber was saying I must slope the tiles to the drain but my research suggests that I don't for the reasons above and your link suggests likewise Thanks!!