Installation Guide
 FlexStoneProducts.com  - 5 -         5/18 
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 bath tub or 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 from 36 in. 
to  fit  the  opening, 
although  how  you  decide  to 
install  vertical  trims  C  and  E  will  influence  the 
width sizing of side wall panels (see Section 7.)
NOTE: You will be able to fine tune your panel to a more accurate fit 
after the holes are cut and your panel can be firmly pushed into the 
corner. 
3.2) For  each  hole  to  be  cut,  measure  the  vertical 
distance between the center of the plumbing 
fixture and the bath tub or shower base. Measure 
the horizontal distance between the center of the 
fixture and the installed back wall panel. Mark the 
center of the fixtures on the face of the panel. 
3.3) Using  a  drill, make a  small  pilot  hole in  marked 
locations. Using a jigsaw, hole saw, or paddle bit 
cut out each hole in the panel to the appropriate 
size for the particular pipe or fixture. Make each 
hole only as large as necessary for access to the 
plumbing. Cover plates only cover so much! 
3.4) With holes drilled so the panel now fits over the 
plumbing, you can fine tune the fit of the panel 
into the back corner and against the tub or shower 
base from step 3.1. 
3.5)  Prior to adhering the plumbing wall panel, seal the 
back panel A to the corner reinforcement using a 
small bead of Performance Pro 100% Silicone. 
3.6) Follow Step 2.2 and adhere the side panel, but also 
form a bead of adhesive on the back around each 
plumbing hole.  
4 INSTALLATION OF OPPOSITE SIDE WALL PANEL (B).  
4.1) Use same procedures as in steps 3.1-3.6 except 
that no holes will be drilled in this panel. Dry fit 
first,  and  then apply  silicone to  seal  the  corner, 
and adhesive as you did on previous side panel.   
Inside Wall
Shower Base 










