Subframe FAQS

The ideal companion to our all-weather composite decking is our DuoSpan subframe system.

DuoSpan combines the strength of aluminium with the design flexibility of recycled plastic. This combination enables distinctive design opportunities for decking and outdoor structures that would be impossible with most conventional subframes. Boasting impressive durability and exceptional ease of installation, DuoSpan provides the perfect subframe for Millboard decking, as well as a universal support system for other outdoor flooring. Its ingenious design includes multiple features that make it near-impossible to get assembly wrong.

Wood is the most commonly used subframe material. However, wood only performs well under ideal circumstances and if the cut elements are regularly retreated. In applications where the wood is in contact with the ground or has limited airflow, the intended lifespan of the frame can be impeded significantly. Our recommendation is to use our innovative DuoSpan framework or Plas-pro to achieve a non-rot solution.

When using Plas-Pro as an alternative to wood, please bear in mind that the structural spans are not equivalent. Please refer to the Plas-Pro brochures and installation guides for further details. If in doubt then contact a member of our technical team on technical@millboard.co.uk.

DuoSpan™ combines the strength of aluminium with the design flexibility of recycled plastic. This achieves a system that provides exceptional ease of installation, enormous strength and durability. DuoSpan has been designed by industry professionals to comply with Eurocode 1: Actions on Structures (BS EN 1991-1-1). The system has been assessed for point loading in relation to both domestic and commercial use, making it suitable for a range of applications.

There may be situations where our Plas-Pro framework items may be more suitable than the DuoSpan, such as furniture framework or areas in wet/marine environments. Manufactured in the UK from 100% recycled plastic and they will never suffer from insect attacks or rotting, they are designed for longevity and reliability.