If there is no seal in the bottom of the frame on the knee wall (correct term or not)either on the outside or inside and I know that there is not as I can see that there is not, then the metal trim would need to have weep holes and there are none of those either because I can see there are no weep holes, so the water is not going to be able to drain anywhere and will just rust and mold.
I have 6 issues from the installation, it's not in straight, handles are chipped, mastic came off all around when I cleaned the shower 4 days after install, no trim in glass and no weep holes and some of the glass is in upside down, etching at the top on some and etching at the bottom on others. That may be minor to some but attention to detail counts for a lot and finally the previous shower holes in the marble were supposed to be filled before the new screen installed and as the frame is not in straight one hole is exposed, clear mastic over it and not sealed, but if the frame was in straight it would be covered.
The company are sending the installer back today, so I will see what BS he tries to give me. I might not be a shower installer, but I am not an idiot female either. Frustrated is an understatement.