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Cortex® for Composite

Cortex® for Composite

Cortex® for Composite

Our strongest hidden fastener system provides a clean look, using a high quality, ACQ approved, specialty deck screw with a TORX® ttap® drive system. The best hidden fastener for stairs and perimeter boards.

Visit your local dealer or retailer to see and learn more about this product.

Blends Beautifully In

Fastener remains hidden because the included plug is made from TimberTech decking and colour-matched to all TimberTech Composite collections.*

*Excludes scalloped Terrain™, Prime+, and Prime Collection boards


Unlike other hidden fasteners, Cortex fasteners can be used on the entire deck surface, including stairs and perimeters.

Strong and Specialized

Deck screw is high quality, ACQ approved, and has a Torx®ttap® drive system.

Available in:
  • 30,5 m (224 carbon steel screws, 300 loose plugs)
  • 30,5 m (224 carbon steel screws, 320 collated plugs)
  • 27.87 m2 – (1050 carbon steel screws, 1200 collated plugs)​
*Cortex not compatible with scalloped Terrain™, Prime+, and Prime Collection boards
  • 9.29 m2 – Cortex ® 316 Stainless Steel Screws (350 screws only)
  • 9.29 m2 – Cortex ® for Decking as Cladding (365 screws only)
  • 9.29 m2 – Cortex ® Aluminum Driller (350 screws only)
  • Plug replacement pack (40 loose plugs only)
  • 9.29 m2 plug pack (400 loose plugs only)

Questions About Installation?
We’re here to assist you with videos, guides, and more. View installation help.

The Best Warranty Coverage
TimberTech products are engineered the right way, to last. And many are covered by leading warranties. See full warranty details.

Is predrilling required when installing TimberTech Composite decking?
Predrilling is required when installing Cortex with any uncapped or capped composite deck board. It is recommended to use a 6 mm drill bit to pilot a hole halfway through the deck board but not into the framing.

Can TimberTech Cortex fasteners be used for all decking?
TimberTech Cortex fasteners can be used on all full-profile TimberTech deck boards, and for Terrain+ Collection scalloped-profile boards. TimberTech Cortex fasteners can NOT be used for other scalloped-profile boards including Terrain, Prime+ and Prime collections.

Can I use Cortex fasteners with steel or aluminum framing?
Cortex for Composite is not compatible with metal framing. For steel framing applications, Cortex Drillers (41 mm 410 stainless steel screws) can be purchased through FastenMaster. To special order the deck plugs needed specifically for your project, please contact 1-800-518-3569.

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