1. Observe and protect
Document symptoms, limit further damage where it is safe to do so, and collect relevant history.
2. Evaluate the house and site
The durable work sits behind the tile. Drain location, framing, waterproofing transitions, ventilation, electrical capacity, and access all shape the project. In an older Elgin Historic District or Spring/Douglas home, that evaluation should include when the bathroom itself was added relative to the house's 1886–1920 construction.
3. Define a written scope
Clarify preparation, protection, materials, access, permits, testing, cleanup, finish restoration, exclusions, and change-order rules.
4. Compare providers
Verify credentials and compare the reasoning and boundaries behind each proposal—not only the total.
5. Inspect closeout
Confirm testing, cleanup, documentation, warranties, and remaining maintenance responsibilities.