I have been installing curbless showers in residences for a while now. A shower curtain will work fine as long as the room is prepared correctly. We normally install a wall mounted toilet in this type of installation so there is no penetration in the subfloor that would have to be waterproofed, which is almost impossible. We also treat the entire bathroom floor like a shower pan using Schluter Kerdi Drains and Matt. Consider using a linear drain on the wall furthest from the door so mudwork can be pitched correctly
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