Installation Guide
Page 11
CONCEALoc
®
 Hidden Fasteners Installation
8
• Create a 2” long groove on the edge of the plank at every joist. 
• Use AZEK’s CONCEALoc Groove Cutting Router Bit or a Freud model #56-112 or 
Bosch model #85610M 1/4” slot cutting bit. 
• Flip the plank over and start the groove 3/8” off the bottom of the plank. 
• Set the depth of the cut from 7/16” to 1/2” deep. 
TO USE CONCEALoc® HIDDEN FASTENERS WITH AZEK SOLID DECK 
BOARDS
3/8”
1/4”
2”
Do not use 
CONCEALoc® 
Hidden 
Fasteners or 
L-Brackets 
for stair 
installation.
6
• When the deck is located in a corner of the house, start with small triangular piece 
of decking in the corner and work your way out. 
• Offset the clip 1/2” to the right of center line of the joist, so screw will not exit the 
side of the joist when driven.
HOW TO INSTALL ON DIAGONAL
Incorrect Correct: Shift over 1/2”
7
• Make two parallel cuts down the center of the board to be replaced, 
then remove the center piece.
• Using a small pry bar, remove the remaining pieces of decking from the tabs.
• Using a reciprocating saw, remove the tabs on the side of the board with the screw 
heads showing.
• Position new board into place, and drive onto remaining tabs.
• Once the board is set into position, secure the loose edges with L-Bracket, Cortex, 
stainless steel, or high-quality coated deck screws.
HOW TO REPLACE A PLANK










