Installation Guide
Page 9
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 carefully 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
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 center 1/2” towards the 
long point of the joist, so screw will 
not exit the side of the joist when 
driven.
HOW TO: INSTALL ON DIAGONAL
8
• Create a 2” long groove on the 
edge of the plank at every joist.
• Use TimberTech’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.
Note: Be sure to ID the side of the plank that has the directional notch; the 
planks with IDs should be installed to the same side. See Directional Notch 
on page 5. 
HOW TO: USE CONCEALoc WITH 
SQUARE SHOULDERED PLANKS
CONCEALoc
®
 Hidden Fastener 
3/8”
3/8” Depth
1/4”
2”
Incorrect Correct: Shift over 1/2”










