1. Note it and protect the space
Document the symptoms, limit further damage where that’s reasonably possible, and gather relevant history.
2. Assess the house and site
What determines whether the room lasts is behind the tile: drain location, framing, how waterproofing transitions are detailed, ventilation, electrical capacity, and access all shape the actual scope.
3. Write the scope down
Cover preparation, protection, materials, access, permits, testing, cleanup, finish restoration, exclusions, and how changes will be priced.
4. Compare reasoning, not just totals
Check credentials, then weigh how each proposal explains its own scope and boundaries — not only the number at the bottom.
5. Verify the closeout
Testing, cleanup, documentation, warranty terms, and any ongoing maintenance should all be confirmed before the job is called finished.