Packy ma if you plugged the drain and had 3 inches of standing water in the base the leak is not around the tile nor the drain nor pan.
Shower drain leaking down onto first floor ceiling.
No leaks were found.
Of course if the leak is severe enough that you need to put a bucket on the floor to collect the water then immediately contact your local plumber.
Door frames often leak as well.
I believe in previous post you indicated the plumber removed the shower heads capped the shower arms and turned water on.
I like to cover the drain and at least 6 inches on all sides.
To determine if its something else such as a leak in the drain or wall you can do a few things.
Here at atlantis plumbing we have taken care of many ceiling leaks successfully and we re available 24 7.
The water can run outside of the shower door area onto the floor of the bathroom and leak between the shower and the floor area.
But it also happens a lot with showers as well.
If you have a second story bathroom the problem could be in.
Use this water to fill the shower until the water reaches the level of the threshold.
This is a very common issue with tubs.
Use a good quality duct tape to cover the drain.
Clean the shower floor and let dry completely.
A leaking shower is generally due to plumbers putty that has started to give away around the seals on the shower drain allowing water to seep through the cracks and onto the basement ceiling below.
A damp spot or worse a continuous drip from the ceiling overhead signals trouble.
The most common causes are the shower pan and or a drain pipe.
How to fix a leak from the upstairs bathroom.