Reply #14: I would consider this a "temporary" floor.

[Dora]

I have no idea how this would perform under a bathroom's conditions. I would think it's not the best - seeing as it's paper, and highly absorbent. A scratch or gouge through the poly would expose the paper underneath to a lot of humidity. But you could always just patch it with another piece of paper and more poly.

If you just want something to cover the concrete until you can put something more durable in later, it certainly wouldn't hurt anything.