2025 UK Decking Installation Guide

TREX DECKING INSTALLATION REQUIREMENTS AND EXAMPLES NOTE: For questions on sub-constructions, please contact a Trex representative.

NOTES: » Gapping rules are required when installing Trex decking. Refer to examples for details. -depending on load requirements and/or if installing decking on an angle, framing spacing may need to be adjusted. » When using recommended screws to attach Trex decking, 2 screws are required at every framing member. » Depending on type of framing being used, different types of compatible decking fasteners must be used. Refer to chart on page 9 for compatible fasteners based on framing material being used. » Trex decking can be installed with many different designs and patterns. Diagonal installation, inlays, and many other variants are possible. Contact a Trex representative for more details. Included below are some basic examples.

A. Parallel Board Installation

>5 ˚ C=6 mm <5 ˚ C=13 mm (Distance between decking and solid wall)

Gap 5 mm

AA

BB

250

400

400

400

250

BB

AA

<35

<35

>40

<15

<15

250

250

Ensure framing is properly attached.

Ensure framing is properly attached.

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