Installation Guide
14
DECKING
Framing and Fastening Tips
Fastening Tip for Trex Transcend, Trex
Enhance, and Trex Select
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
It is recommended 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.
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, add a 2" x 4"
"nailer" board at the butt
joint. This allows screw-in
at 90 degrees and allows
fasteners to be used at
end of each board.
Dock Applications
Trex decking contains no materials that will
harm marine life and is safe for the environment.
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 aected.
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 sucient contact between the
dock and gasoline, grounding of the dock is
also recommended.
1"
1"
3/16" (5mm)
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.
Herringbone Pattern
Picture Frame Pattern
Breaker Board
Single Joist
Breaker Board
Double Joist