Different purlins are used for different purposes, including structural support of walls or floors. Purlin is important because without it, there's no frame for the sheeting on the roof to rest on, making purlins critical to the structure of the roof. Wood Purlin is good for use with the fibre cement sheeting.

Do I need purlins for a metal roof?

In general, purlins are used instead of traditional decking when it comes to metal roofs. ... Decks can help support the enormous weight of roofing more easily, and therefore are recommended for larger projects, like industrial and commercial metal roofing.

What do purlins do?

Purlins are horizontal beams that are used for structural support in buildings. Most commonly, purlins are major components of roof structures. Roof purlins are supported either by rafters or building walls and the roof deck is laid over the purlins. ... As a result, they tend to be used for large-scale structures.