North Seattle plumbing / guide 45
Water outside a shower or tub can cross a curtain, door, joint, trim, overflow, drain, supply opening, or adjacent wall route. The first outside edge and operating stage matter.
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Cooler weather and ventilation can change surface moisture, but condensation should not be assumed when another unit, ceiling, or wall is getting wet.
Record ordinary shower direction, door or curtain position, tub fill below the overflow, drain-down, idle time, and any water visible in the next room or level.
Skip another test when water reaches loose tile, a lower space, an electrical item, or a surface that feels unstable. Do not flood an edge deliberately.
What to observe now
Keep the notes factual. A visible clue can direct an inspection without proving what is hidden.
Mark where water initially crosses onto the floor, wall, or trim.
Note spray direction and the ordinary door or curtain position.
Keep water below the overflow and stop if the exterior changes.
Watch for moisture that begins only while the tub or pan empties.
Check a visible neighboring boundary without opening wall or floor finishes.
Responsibility
Closeout record
Assign plumbing, enclosure, waterproofing, drying, electrical review, tile, caulk, paint, and lower-room work to named parties in the final record.
Current primary sources
Public procedures and status can change. Use the source that owns the decision.