The 3 photos show the leak. I have previously tried to stop it using copious amounts of silicone. Now I am removing the silicone. Do I have to dismantle the shower stall and rebuild to stop this leak? It is causing damage to the ceiling and room below.

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I need to know more about your shower. Custom tile or manufactured enclosure? Don't use the shower and let the ceiling dry out. Answer my questions and give me a place to start. Regards, Tom