1. Observe and protect
Record what you're seeing, stop any active water or damage if it's safe to do so, and note when it started.
2. Evaluate the house and site
What actually holds up over time is buried under the tile — drain slope, wall framing, the waterproofing behind the transitions, fan capacity, and how the room is accessed all decide whether the finish lasts.
3. Define a written scope
Spell out prep work, protective measures, materials, access needs, permits, testing, cleanup, and how change orders get handled.
4. Compare providers
Check credentials, then weigh the reasoning behind each proposal, not just the bottom-line number.
5. Inspect closeout
Verify testing was done, the space was cleaned up, documentation was provided, and you understand ongoing maintenance.