The TimberTech Composite Decking Installation Guide (PDF) provides comprehensive instructions for installing TimberTech Composite boards across all PRO, EDGE, and Reliaboard® product lines. This manual covers everything from substructure preparation and joist spacing to hidden fastener systems, gapping requirements, stair installation, trimming, and long-term care.
The guide begins with framing and layout requirements, emphasizing joist spacing of 16″ on center for standard installations or 12″ on center for diagonal or commercial applications. Installers are reminded to check joists for plane, remove protruding fasteners, and use blocking every 4’–6′ to reduce joist twist and movement. Guidance is included for picture-frame decks, on-grade installations, and ventilation requirements to minimize board movement.
Fastening options include TimberTech TOPLoc®, Cortex® plug systems, CONCEALoc® hidden fasteners for grooved boards, and FUSIONLoc® pneumatic clips for faster installation. Each fastener method includes detailed screw-placement diagrams, pre-drilling requirements, mushrooming prevention tips, and instruction for installing at butt joints, start/stop boards, and diagonal layouts. The guide also covers routing square-shouldered boards for concealed fasteners, and explains where hidden fasteners cannot be used (such as stair treads).
Gapping and expansion guidelines outline the required 1/8″–3/16″ spacing between all boards and a minimum 3/16″ gap where boards meet a structure or post. Temperature-based butt-joint tables help installers account for expansion and contraction during hot or cold installations. Notes include recommended airflow, blocking practices, and avoiding large continuous runs in extreme climates.
Stair installation instructions highlight stringer spacing, tread construction with full-width boards, riser requirements, and the need for at least one center stringer for support on deeper treads. Additional sections cover trimming a TimberTech deck, fascia fastening with TOPLoc Fascia Fasteners, care and cleaning recommendations, chemical cautions, heat-reflection warnings, and storage/handling best practices.
Download the full TimberTech Composite Decking Installation Guide (PDF) below for joist details, fastening diagrams, stair charts, gapping tables, and comprehensive maintenance guidance. For support selecting TimberTech fasteners or planning a full deck system, your local TimberTown team is ready to help.
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