You have a number of water-resist- ant finish options for the shower panels. The finish shown is called an ombre effect, which lets the nat- ural feel of the wood ripple through the color.
Shown here is the completed cladding.
from it I used a weatherboard at the bottom. A weatherboard is a horizontal piece, installed at an angle (like a window sill or drip cap). Underneath it I cut a 1/4-in. deep kerf parallel to the front edge. This is called a "bond break" that causes sticky water molecules to fall apart and fall to the floor instead up wrapping around the weatherboard and leaching up the wall. Since the weatherboard is also the starter piece for the vertical slats, I made sure to get it nice and level. I pitched it 8-degrees and shot it right to the bottom wall plate.