Which Wood Is Best for Kitchen Cabinets? A Buyer's Guide
The kitchen is the toughest room in the house for wood: steam, heat swings, and doors opening thousands of times a year. Choosing right starts with knowing these three stresses.
A wooden door can work in a bathroom, but not the same door built for a bedroom. The difference is in details that rarely come up when placing an order.

Short answer: yes, it can work. Long answer: a door built for a bedroom will warp, peel at the edges, and blacken at the bottom within a year or two in a bathroom. The difference isn't the type of wood, it's details that rarely come up when placing an order.
A bathroom combines three things no other room has: high relative humidity after every shower, a sudden humidity swing whenever the door opens, and direct water on the bottom edge of the door during floor cleaning. That third factor does more damage than the first two combined, and it's exactly where most installations fall short.
The bottom edge of the door is the one place nobody looks, and the one place where the damage starts.

If the bathroom has no exhaust fan and no window, or if the floor behind the door sits level with the shower floor so water reaches it, wood is a high-risk choice. In that case, either the space needs to change or another material makes more sense. Saying so honestly is part of doing the job right.
After a shower, leave the door open for a few minutes so the moisture can clear; that one habit does more than any maintenance product. Dry off any water on the surface and don't let it sit on the edge. Once a year, check the edges and the hinge area: if the coating has worn through anywhere, fix it on the spot, before moisture reaches the core.

The kitchen is the toughest room in the house for wood: steam, heat swings, and doors opening thousands of times a year. Choosing right starts with knowing these three stresses.

A wooden barn door glides along a wall-mounted rail instead of swinging open, so it never eats up floor space; here's where it works and where it doesn't.

A flush door removes the usual frame and protruding handle, leaving one continuous wall surface. Here is how the system works and who it actually suits.