ABSTRACT

In recent years there have been reports of wind damage to fully supported aluminium standing seam roofs in the UK. On investigation it was found that the holding down clips made from aluminium had fractured at their base, allowing the roofing panels to lift and eventually break away.

The Paper describes the findings from site investigations on two different roofs that failed at wind speeds significantly less than design. The modes of failure are examined, recognising that the wind applies a cyclic dynamic load onto the lightweight flexible roofing system. The paper concludes with current best advice for designers and contractors.

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