Hello!

So I have three showers all tiled with marble. I've sealed them several times but they all have sections where they are constantly wet looking.

I'm wondering if this might be a deeper problem then just needing to seal the marble again.

I'm adding pictures of the current situation, and I have some pictures during the build process.

If anyone has any advice, it be super appreciated.

You can see the darker spots around the drain here:

And here is another bathroom with similar issues, you can see some darker spots near the linear drain:

And the base of the wall tile looks like it is soaking wet.