JJI-Joists – the versatile answer for floors, walls and roofs

Using I-Joists in place of solid timber joists for floor installations in domestic housing is now so commonplace as to be unremarkable. A combination of light weight, resistance to bending and dimensional stability has made I-Joists a firm favourite with builders across the UK. And first choice amongst the builders and architects is the James Jones & Sons Ltd JJI-Joist, which is the UK market leader with an estimated 40% market share.

What is less well known however is the versatility of JJI-Joists in being used for much more than just floor systems. JJI-Joists are now commonly used as wall studs where the range of depths available and 9mm web

make them ideal where thermal efficiency and depth of insulation are paramount. A lot of architects are turning to JJI-Joists when designing to Passivhaus standards for just these benefits.

JJi-Joists are also being increasingly used in roof structures as well. James Jones & Sons pioneered the Intelli-Roof concept over a decade ago; where cassette panels, formed using JJI-Joists and OSB sheets, are used to create a fully insulated ‘room in a roof’. As the cassettes are craned into place in sections, the process of getting a watertight roof onto a building is much, much faster than conventional construction methods – the record, using Intelli-Roof cassettes is seven house roofs in one day on a site. Today the cassette roof principle has been widely adopted, and not just for houses. JJI-Joist based cassettes are ideal where larger spans – up to 12 metres - are required, such as schools and leisure facilities.

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• UK Manufactured
• Market leader
• FSC and PEFC Certified
• BIM compatible
• Best resourced design and engineering back up

To find out more about using JJI-Joists in your project please visit www.jamesjones.co.uk/ewp