More About Cladco 4m Structural Composite Joists
Starting your decking project on the right foot is essential, and Cladco’s 4m structural composite joists are designed to provide a sturdy yet lightweight framework for your composite decking boards. Best installed over a solid concrete base, these joists create a reliable, long-lasting foundation that supports your decking with strength and precision.
Manufactured from 60% recycled hardwood fibres and 40% recycled plastics, the charcoal-coloured joists measure 4000mm x 100mm x 50mm. As these joists are concealed within the substructure, they do not need to match the decking or trim colours. Any visible edges can be neatly covered using Cladco decking and fascia boards.
Joist Specifications
Length: 4m
Width: 100mm
Thickness: 50mm
Weight: Approx. 17.24kg
Ideal for elevated decking areas, these structural composite joists can also be placed directly onto grass if a concrete base is not feasible. They are engineered for hard-wearing, long-lasting performance.
For optimal strength and stability, we recommend using one joist per square metre of decking, spaced at a maximum of 400mm centres. Proper support for the joist substructure is required approximately every 1 metre.
For detailed installation guidance, please consult our installation guides.
Looking for an alternative?
Browse our decking frame department for composite joists/battens and more.
*Cladco composite products are available as FSC® certified at no additional cost. Please specify if you require FSC® certification when placing your order.
