Standard roofing materials last approximately 12 to 20 years while you can rely on a metal roof lasting for three decades or even longer.
Metal roof in shower.
Corrugated metal roof panels.
Shower corrugated metal roof panels.
Mar 12 2015 shower surfaces require waterproof coverage to prevent water from ruining the walls and the framing beneath.
To fasten the panels to the wall i used hex head sheet metal screws with a little bit of silicone applied to the threads and 3m hi strength 90 spray adhesive to hold the panels tight against the wall.
Metal roofs never decompose and they can often be refreshed with a new coat of paint when needed.