![enter image description here](https://i.stack.imgur.com/mKUoT.jpg)![enter image description here](https://i.stack.imgur.com/8Hyao.jpg)I have had a brand new shower put in, the tiling is shown, however after about 1 month we noticed a small amount of water passing though to the dry wall. The below is now 9 months later.

The contractor does not know what is causing the problem.

The tiles and grouting used I assume are waterproof.

I would really appreciate your thoughts!

![enter image description here](https://i.stack.imgur.com/fSBGA.jpg)

![Shower Tiles](https://i.stack.imgur.com/f2Ehr.jpg)