Residential Roof Purlins

Rollforming Services' 40mm Roof Purlins are a direct replacement for timber purlins. They are lightweight, dimensionally stable, accurate and straight. They expand and contract at the same rate as steel roofing products in extreme temperature changes. They can be fitted to both timber and steel trusses with Type 17 Teks. Ideally suited to timber framed homes, steel framed homes, steel framed buildings and carports.

40mm Purlins are designed for use with corrugate roofs or wall claddings. With spans of 1200mm at 900mm spacings they can be used in extra high wind zones and where snow loads are present. They can be made from 0.75mm, 0.95mm and 1.15mm G550 Z275 steel. Lengths are available from stock or you can choose to have them run cut-to-length to reduce waste onsite.

For larger spans check out our Tophat Purlin range.


All products are Z275 Galvanised coated backed by New Zealand Steel's 50-year durability statement.

Purlins are manufactured from hot dipped galvanised steel with a coating weight of 275g/m2, in line with other common lightweight steel structural building products.

This gives good protection in most exposed internal environments. Run-off from, or contact with, materials which are incompatible with zinc should be avoided.

Handling and Storage

Roof Purlins must be kept dry during storage as water present between close stacked sections will cause premature corrosion. If they become wet, they should be separated and stacked openly to allow for ventilation to dry the surface.


Roof Purlins are available in long run lengths up to 12 metres, depending on the available transport and handling facilities. Stock lengths may be available from your local stockist.


Cutting is preferably done by shear or hacksaw. When using abrasive disc blades care must be taken to ensure the swarf produced does not affect other materials and the burred edge should be cleaned off at the completion of cutting.

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