Description
Product Details
- Size: 50mm x 50mm x 2400mm
- Weight: 5.33kg per joist
- Application: Composite subframe support for decking installations.
- Can be cut easily!
- Delivery – Free over £250
The Solid Foundation Your Deck Depends On
- Built to support your entire deck – provides a strong, stable subframe that keeps boards level, secure, and long-lasting
- Perfect match for 5m Composite Decking systems – designed to work seamlessly with composite decking boards and fixings
- Consistent structure – uniform 50mm x 50mm profile makes planning and installation straightforward.
Engineered for Outdoor Performance
- Solid plastic composite construction – won’t rot, warp, or degrade like traditional timber joists
- Moisture-resistant – ideal for ground contact, damp areas, and all-weather conditions
- Long-term durability – built to handle load, pressure, and temperature changes without weakening
Low Maintenance. High Reliability.
- No treatment required – no sealing, staining, or ongoing upkeep needed
- Resistant to insects and decay – unlike timber, it won’t attract pests or break down over time
- Stable and dependable – maintains its shape for a longer-lasting decking structure.
Designed for Efficient Installation
- Easy to cut and work with – compatible with standard tools for quick on-site adjustments
- Works with standard joist layouts – ideal for typical 400mm centre installations
- Pairs with full AmbiDeck system – integrates with clips, trims, and boards for a complete build.
Why It Matters
- A strong deck starts underneath – the better your subframe, the longer your decking will last
- Upgrade from timber joists – avoid the common issues of rot, movement, and maintenance.






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