Clean the shower floor and let dry completely.
Shower drain leaking down onto first floor ceiling.
Use a good quality duct tape to cover the drain.
To determine if its something else such as a leak in the drain or wall you can do a few things.
This is a very common issue with tubs.
How to fix a leak from the upstairs bathroom.
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.
I like to cover the drain and at least 6 inches on all sides.
A damp spot or worse a continuous drip from the ceiling overhead signals trouble.
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.
Leak from second floor shower into first floor ceiling.
One of the most common types of water leaks in a basement ceiling is due to a shower drain leaking.
If you have a second story bathroom the problem could be in.
Here at atlantis plumbing we have taken care of many ceiling leaks successfully and we re available 24 7.
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.
But it also happens a lot with showers as well.
No leaks were found.
Use this water to fill the shower until the water reaches the level of the threshold.
I believe in previous post you indicated the plumber removed the shower heads capped the shower arms and turned water on.
Now using a different water source such as a garden hose or another bathroom fill buckets with water.