The escutcheon is the plate behind the shower handle. Moisture around it can come from spray reaching the trim or from a leak at the valve behind it. The timing and location give a plumber a starting point.
Record where moisture appears
Note whether the wall gets wet only during a shower or remains damp when the shower has been idle. Look at the adjoining room or ceiling below for staining. Avoid running the shower to reproduce a leak if water is already reaching a finished surface.
Check the valve before sealing trim
Share a photo of the handle and the area where moisture appears. A plumber can inspect the valve and determine whether the trim needs resealing or the plumbing behind it needs repair. Follow the trim manufacturer’s instructions for any drain opening in the plate.
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