Practical considerations for roof design

There are a number of competing factors when designing for commercial or residential roofing in Australia and these can change depending on where the building is located.

Requirements for roofing design in the NCC are also often modified. In this session, Glen Roberts and Homeira Aryanpad reviewed practical considerations for roof design in Australian conditions, focussing on implications of different wind classifications, weatherability and rainfall, roof pitch, fixing methods, thermal performance, climate zones and roof colour, lapping alternatives, single skin or insulated panel roofing and warranty considerations.

They also demonstrated static and cyclonic testing and failure modes using the Bondor® NATA certified structural testing facility.


Homeira Aryanpad is a Chartered Professional Engineer with a Civil Engineering degree from Adelaide University. She has over 25 years of experience as an engineer in the building industry mainly within the manufacturing field as well as consultancy – specifically in the design and construction of airports.

Her main expertise lies in the engineering research, product development, technical solutions and advice, although she has various diverse projects under her belt, from developing websites, eCommerce solutions and engineering software as well as managing construction projects, process improvement and business integrations.

Glen Roberts has over 30 years’ experience in the roofing and roll-forming industry. His experience ranges from practical requirements of roof installation and performance when running his own roof contracting business to an extensive background in sales and product development roles with Lysaght, Stramit & more recently Bondor. Glen has advised on industry group submissions for a range of Australian Standards applicable to roofing and also submissions to the roofing guidelines for HB 39. He as also developed and training programs on practical issues for roofing for sales teams in the roll forming and insulated panel industries.

Lean In session partner

This session is proudly supported by the Institute’s National Corporate Partner Bondor®.

Bondor® is Australia’s leader in complete thermal building solutions and lightweight architectural panels. More than just the leading manufacturer of insulated panels, Bondor® has unrivalled experience in design assistance and construction.

As Australia’s only manufacturer, distributor and installer of EPS-FR cored panel, Factory Mutual Approved PIR cored panel and Factory Mutual Approved Mineral Fibre cored panel, Bondor® is in a unique position to be able to offer its customers impartial advice on the right insulated panel solution to meet their needs.