Installation Guide
 FlexStoneProducts.com  - 3 -  5/18 
Install Instructions 
INSTALLATION OF INSIDE CORNER REINFORCEMENT (J). 
1.1) Flashing  Tape  Corner  Reinforcements  go  behind  the 
panels in the back  vertical corners  for  added  leak 
protection. This tape has been cut to length, matching 
the height of the panels of your kit. 
1.2) Apply  a  generous  bead  of  adhesive  onto  both  walls 
about 3/4 inch away from the corner. Fold the flashing 
tape at the center crease with the print side together, 
then press the tape into the corner using a taping or 
putty type blade. Using the same blade, flatten out the 
tape to create a flat, smooth inside corner. Wipe away 
any excess adhesive. 
2 INSTALLATION OF BACK WALL PANEL (A). 
NOTE: It is not necessary to cut the top edges of panels to be level, 
as they will be covered by trim moldings.  For right-hand plumbing 
wall installs, reverse Panels A and B in these instructions. 
2.1) Each wall panel should be fit to the back corner, and to 
the  shower base.   This may usually be done by 
trimming either the vertical corner edge, or the edge 
that rests on the base.  In some circumstances you will 
need  to  trim both to  achieve  a  tight fit. Dry fit the 
panel by trimming with a utility knife, jigsaw, or power 
plane. 
2.2) When  satisfied  with  the  fit,  peel  protective  masking 
back from the edges  of the panel (approx.  4”) and 
clean burs from any rough edges. Generously apply 
Performance Pro Adhesive in lines or blobs to the back 
of  the  panel in a pattern  every 3 to 4 inches.  Use 
approximately  one  10oz  tube  per  8  square  feet 
following adhesive directions on tube. Push the panel 
in place, lightly pounding to achieve good bond. 
3 INSTALLATION OF WET / PLUMBING WALL PANEL (B). 
3.1) Hold side panel as close to plumbing wall as possible. 
Scribe  and  trim  the  inside  edge  and  bottom  edge 
against the shower base for best fit 
before
 measuring, 
marking, and cutting holes for plumbing fixtures. The 
depth of the side wall panels can also be trimmed down 
to fit the opening or your shower base, 
although how 
you decide to install vertical trims C and E will influence 
the width sizing of side wall panels (see Section 4.)








