Installation Guide

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7. Drill 3/16” pilot holes near the top of the nailing flange at all stud locations. After drilling the pilot
holes, apply a small amount of silicone to the pilot holes and use 1 ½” stainless steel screws to
secure the shower base to the studs. Be careful not to overtighten the screws, as this can crack the
nailing flange. If a gap exists between the shower base and a wall stud, use wooden shims to fill
the gap before installing the screws. Trim all shims at the same height as the nailing flange.
8. Install the shower walls according to the instructions provided with the FlexStone shower wall
surround kit. Before installing the FlexStone walls, waterproof backer board (cement board or
waterproof drywall) should be installed above the nailing flanges and secured to the wall studs. The
FlexStone wall panels are then installed with adhesive to the backer board, with the bottom of the
FlexStone panels resting directly against the FlexStone surface inside the shower base. Finally, seal
all joints between the wall panels and the shower base, and where the front of the shower base
meets the floor with Performance Pro 100% color-matched silicone.
Helpful Hint: Use a sheet of cardboard on top of the shower base floor to protect the base during
the installation of the backer board and FlexStone wall panels.
Pilot Holes