Below the shower pan if the pan is on an upper floor.
Shower leaking to floor below.
If you have a second story bathroom the problem could be in.
Another way to tell is to examine the drain from underneath which can be accomplished in the crawlspace or the basement.
The area around the shower pan for dampness and water.
Besides this method you can make observations around your shower pan for leaks.
Soggy carpets around the shower stall.
This cuts the cost of having to dig through the floor to get to the water pipes and if for any.
How to find the source of a bathtub drain leaking.
If it gives this may be the problem.
Mold spots on the wall or floor near the tub or shower.
Let s check for the next possibility.
A damp spot or worse a continuous drip from the ceiling overhead signals trouble.
Depending on which floor this shower is located you might see water or water marks on a ceiling or when you look in the basement or crawl space.
Water leaks from a plumbing fixture or pipes may go unnoticed for days or even weeks until you notice a wet spot or water stain on the ceiling below.
Once you see that the water is coming through the ceiling take immediate action before the leak causes any more damage to your house.
If you find some you re in for a new shower pan or shower floor to stop the leak.
Just a note about shower or bathtub leaks over a garage.
The best way to tell if this is your problem is to push down on the floor around the drain.
Failure to do so puts more moisture behind the wall or under the floor which can cause mold rot in the wood structure or crumbling drywall.
If your pan or floor looks good try this basic step.
If you have a shower door splash water all around the door and frame.
If your tile shower is leaking the cause of the leak must be found and addressed as soon as possible and definitely before you take a shower again.
If you see a leak at this point there likely is a problem with the shower base.
Loose floor tiles close to the shower.
How to fix a leak from the upstairs bathroom.
The areas to check include.
If no water drips out below check closely with a bright light it may not be your shower pan leaking.
The idea is to use the process of elimination and keep looking for any evidence of a leak each step of the way.
If it happens that your shower or bathtub is located above your garage you can cut costs by having the plumber cut the ceiling under those pipes and replacing it with a removable door.
Water stains on the ceiling or joists below.
The ceiling board or floor may show some stains.