Notice the signs
Observe
Record moisture with the controls off, while cold and hot water run, during spray against each enclosure edge, and after drainage. Note temperature changes, loose trim, recent grout or fixture work, and access behind the valve.
Protect the room
Safety line
Stop use for scalding, unstable flooring, ceiling movement, or water near electricity. Do not remove tile or open the ceiling until supply, drain, and enclosure tests have a planned order.
Material note
Local boundary
Plumbing, enclosure sealing, tile waterproofing, structural repair, electrical clearance, and drying may belong to separate providers. Cohasset permitting questions should be tied to the actual valve, drain, or concealed-piping scope.
Service flow
Written scope
Have the proposal identify cartridge, valve, diverter, shower arm, drain assembly, waterproofing boundary, access side, trim reuse, testing, and wall closure. Ask how each proposed opening helps distinguish the path.
Close the loop
Verification
Verification should repeat the staged test rather than spraying every surface at once. Inspect the room below, meter any remaining material moisture where appropriate, and record which finish repairs wait for drying.