When we shower, water runs down the door and leaks out through the gap shown in picture 2. We’ve tried using a generic shower seal, but because it’s a framed door, we need a seal that’s at least 15mm wide — and we haven’t been able to find one that size.
The underside of the door isn’t solid either, shown in the first picture, so we’re not sure if something is supposed to slide in there, or if a part is missing.
Thanks in advance for any advice!

