Trex® Full Installation Guide

Framing and Fastening Tips

In most cases, install fasteners at a 90° angle (perpendicular to the board). At board ends on the deck's edge, you can install screws placed perpendicularly at the recommended distance, at minimum of 1" (25mm) from the board end and edge, without splitting the board.

Fastening Tip for Trex ® Decking NOTE: When using pneumatic or battery-operated equipment, adjust the pressure so that you only shoot the head of the screw to be flush with the board’s cap. DO NOT shoot the fastener head completely through the shell.

Clean Cut Boards

3/16" (5mm)

For butt joints, where boards meet over a

single joist, use the Trex Hideweay Butt Joint Clip. Optional method is to add a 2" x 4" "nailer" board at the joist and use two Trex Hideaway Universal Hidden Fasteners. This allows screw-in at 90 degrees and allows fasteners to be used at end of each board.

It is required that boards be clean cut on both ends a minimum of 3/16" (5mm). Ensure board ends are cut square. Composite decking is a great alternative to traditional wood decking. When building your deck and railing, it is recommended that code-approved structural material be used as the framing and joists. Check your local building codes for restrictions. Trex decking cannot be used for structural applications. Do not attach Trex decking directly to any solid surface or watertight system.

Dock Applications As long as dock is in intermittent contact with water, i.e., splashing and not in continuous direct contact with water, the durability of the Trex decking should not be affected. For docks, a 3/8" (10mm) width-to-width gap between boards is recommended to allow for increased drainage due to increased contact with water. In addition, stainless steel fasteners should be used. If there is a great deal of contact between the dock and gasoline, grounding of the dock is also recommended.

Special Patterns When planning a unique pattern, you will need to adjust the framing to support the surface pattern. Many decks are designed to take advantage of angles, as shown below.

Picture Frame Pattern

Breaker Board Single Joist

Breaker Board Double Joist

Herringbone Pattern

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NOTE: Construction methods are always improving. Please refer to www.trex.com for the most up-to-date installation requirements.

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