3.6m Composite Joist/Batten – Long-Lasting Decking Foundation
Our 3.6m Composite Joist (40mm x 30mm) is built for supporting composite decking and cladding projects where a durable, low-maintenance base is essential. Designed to sit directly on solid surfaces like concrete, this joist won’t rot, split, or warp over time—unlike traditional timber.
Its lightweight, hollow structure allows for easy handling and fast installation, while the reversible profile offers added flexibility on-site.
🔧 Key Features:
✅ 3.6m length with 40mm x 30mm dimensions
✅ Hollow core – strong yet lightweight
✅ Fully reversible for ease of installation
✅ Zero maintenance – no staining or sealing needed
✅ Will not absorb water – ideal for damp environments
✅ Suitable for ground-level decking on concrete bases
❌ Not intended for raised deck applications
This is the go-to solution for anyone looking to build a composite deck with a cleaner, longer-lasting subframe.

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