Installation Guide

Page 7
Cortex
®
Hidden Fasteners Installation
Restricted Cortex Uses
The AZEK Cortex System is designed for traditional
elevated deck surfaces. The following applications require
a different fastening method:
• Sleeper systems: Framing rests directly on the ground
or roof deck.
• For attaching fascia boards: AZEK Cortex should
not be used.
• Docks or decks with framing members in constant
contact with saltwater.
Important Information
• The Cortex Setting Tool must be used to set the Cortex
screw to the proper depth.
• The Cortex fastener must be driven perpendicular to
the deck surface for proper fit and ideal finished look.
• The cored hole must be free of debris or moisture. Use
a smooth hammer head to set the Cortex plug.
• The interaction between the deck board, screw, and plug
is essential. Use of non-Cortex Screws or non-Cortex plugs
will nullify the warranty.
End and Edge Distance Minimums
• Pre-drilling is required when installing Cortex fasteners
less than 1” from the end and 1” from the edge of a AZEK
deck board.
• Pre-drilling is also required at butt joints. Common building
practices dictate that you “sister” an additional joist at your
butt seam connections.
• Pre-drilling should be done with a 5/32” drill bit to create
the proper pilot hole.