It likely was not installed correctly.
Repair leaky tile shower floor.
This pan was leaking a tile guy came in to repair redo it but he screwed it up.
To waterproof a shower pan and shower walls you have to have a waterproof membrane that meets ansi a118 10 to be properly installed.
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.
There has to be an underlying problem with the shower pan s waterproof membrane.
This pan was leaking a tile guy came in to repair redo it but he screwed it up.
If your pan or floor looks good try this basic step.
For this we will apply shower plug sealant.
Check for cracks even very fine ones anywhere on the pan.
You can start by pouring it into a tray or bucket brush shower plug onto the tiles with a natural bristle brush.
Apply a second coat to the same.
However the complexity of the process can cause many issues down the road if several key steps are not properly executed.
Understand and fix your leaky tile shower pan to get rid of mildew mold and rotting wood.
If built correctly a shower floor built over a mortar bed can be long lasting and reliable.
Application of shower plug to fix a leaking shower floor.
Improperly installed shower floors can allow water to seep through the floor causing cracks or failure of the tiles which results in water leaking below the floor.
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.
Answer answer if water from your shower is leaking into a crawl space the problem is not the cementitious grout joints.
They can often cause damp and mould within surfaces behind tiles and can even threaten the structural integrity of walls so it s important to tackle the issue at the first sign of a leak.
The tiles and grout need to be rendered waterproof if the leak is to be fixed.