Installation Guide
7.25” x 7.25” SQUARE POST EXAMPLE
Rip four 7.25” x 48” pieces of 3/8” treated plywood. Attach each piece directly onto each side of the 
post to create the 8x8 box. Attach the GenStone Pillar Panels and caps according to the previous 
instructions for a smaller structural post.
The 13.50” x 13.50” cap is glued down to the top of the box framing using PL300 or equivalent. You 
may also fasten mechanically with 3” trim head screws from the edge of the cap into the box. To 
attach railing brackets use color matched solid blocks cut into the GenStone Pillar Panels between 
brackets and actual structural post. Make sure the fasteners are long enough to penetrate through 
the blocking and into the structural post at least 1.50”. Conceal fastener holes with color match 
caulking and a GenStone paint kit.
Trace the actual structural post size (3.50”x 3.50” or 5.50”x 5.50”) onto the inside center of the 
GenStone post cap. Drill a 3/8” hole into the 4 corners of the square you have drawn. Cut the square 
out using a Jig saw or keyhole saw. Turn the cap over and mark and make a straight miter cut with 
your saw from the bottom left and bottom right hand corners of the cutout to the corresponding 
corners of the cap. You should have created a 3 sided piece and a single side which can then be 
glued back together around the post on top of the pillar. The cap should go back together cleanly. 
Clamp or screw the corners of the mitered cap back together and touch up if necessary with the 
GenStone touch up paint kit, and caulk around the post with GenStone color match caulking.
NOTE: 
GenStone Pillar Panels can be stacked to cover a post to any height. Simply create the box as far up 
as you would like and cover with 48” pillar panels. When not using a GenStone Pillar Cap to protect 
the box and pillars, please seal the top of the pillar panel applications with caulking.
PILLAR CAPS
CONTINUING THE POST THROUGH THE CAP
After all of your panels, ledgers and trim are 
securely fastened, go back and conceal any 
fastener holes in the face of the Products with a 
GenStone color match caulking kit. 
HOW TO TINT THE CAULKING
Follow the step by step video found on the 
GenStone website (genstone.com) to tint the color 
match caulking. The ledgers will require only one 
of the 3 base colors, while the stone pieces require 
a combination of all 3 paints provided in the kit. 
For larger projects, separate color match caulking 
kits are suggested for the stone and ledgers. 
FINISHING TOUCHES





