Installation Guide

Page 11
Cortex
®
Hidden Fastening System
Cortex
®
Hidden Fastening System Installation Instructions
Suggested Drills
Important Information
Important Information
Restricted Cortex Uses
Corded or cordless drill
Impact Drivers are not recommended
when using TimberTech Cortex.
• Pre-drilling with a 7/32” drill bit is always required
when installing Cortex in TimberTech decking.
• 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. (DO NOT drive on angle).
• 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 plugs will nullify the warranty.
• For gapping requirements, see page 3
• For framing less than 2” in thickness, shorter
Cortex screw option may be required.
• For attaching fascia and riser boards: TimberTech
TOPLoc Fascia Fasteners should be used.
• Docks or decks with framing members in constant
contact with saltwater.
• Deck materials with a scalloped bottom such as,
but not limited to PRO Terrain, EDGE Prime, EDGE
Prime+, and Reliaboard.
• Pre-drilling is required for installation into
TimberTech decking or mushrooming and splitting
will occur.
• Pre-drilling should be done with a 7/32” drill bit to
create the proper pilot hole.
• No fasteners should be installed closer than 3/4”
from the end or edge of the board.
The TimberTech Cortex System is designed for
traditional elevated deck surfaces. The following
applications require a different fastening method: