Framing and Fastening Tips Fastening Tip for Trex ® Decking
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. 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 Hideweay ® Universal Hidden Fasteners. This allows screw-in at 90° and allows fasteners to be used at end of each board. When using Trex Hideaway ® Universal Hidden Fasteners, ensure that these fasteners are ALWAYS placed at board ends. The end of the deck board MUST ALWAYS rest on a framing member and fastener must be used in this location.
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.
The end of Trex® decking MUST ALWAYS rest and be installed on a framing member. Maximum 3/4" overhang of
decking is allowed. Clean Cut Boards
3/16" (5mm)
3/16" (5mm)
5 mm
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 build- ing 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 Trex ® decking is approved for all water-contact applications. Boards can be submerged in water for extended periods of time, including multiple times a day with rising tides. Stainless steel fasteners should be used. In addition, 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
NOTE: Trex® 1 x 4 decking is not recommended for overhang applications when running parallel to framing or when installing special patterns.
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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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