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DuoSpan® and DuoLift®. Engineered strength and design versatility from Millboard.


Representing a unique landscape construction frame, the DuoSpan subframe system from Millboard combines the strength of aluminium with the design flexibility of recycled plastic. This combination enables distinctive decking designs and outdoor structures that would be difficult with most conventional subframes, and its slot-and screw assembly assists with easier installations.

The Millboard DuoLift joist support system provides substantial height flexibility within four stackable components, removing the challenge of various fixed-height pedestals over a single area, and provides enhanced ease of installation, together with superior load bearing.

DuoSpan and DuoLift have been designed by industry professionals to comply with Eurocode 1: Actions on Structures (BS EN 1991-1-1), and can be used with a wide range of decking materials.

Unique curved constructions
The combination of rigid DuoSpan with flexible Plas-Pro enables the construction of stunning curved formations.

Exceptional spans
The DuoSpan 99mm Joist provides an exceptional 1800mm span in residential applications, reducing posts or joist supports required.

Galvanic corrosion between different metals is minimised with our cathodic barrier fixings.

Simple, stable fixing
Decking and cladding can be easily and securely screwed directly into the DuoSpan subframe at almost any angle using Durafix 45mm screws.

Flexible connectivity
Multiple bracket types for all types of joints, including Flexible Brackets for non-standard angles.

Slot-and-screw assembly
Screw-locating grooves and self-drilling screws ensure accurate alignment and a fast fix that’s right every time.

To find out more and download the full specification, visit www.millboard.co.uk/duospan

Contact details:


Tel: 024 7643 9943
Email: enquiries@millboard.co.uk

Visit our showroom!
London showroom: 63 Goswell Road, Clerkenwell, London, EC1V 7EN
Midlands showroom: Castle Court, Bodmin Road, Coventry, CV2 5DB

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