Is Sarking Required Under Colorbond Roof

What is roof sarking.

Is sarking required under colorbond roof.

Commonly referred to as sarking. It is mandatory under the building code of australia bca that all tiled residential roofs regardless of roof pitch with a rafter length greater than 6 metres must be sarked. This video answer the question what is sarking. Colorbond steel and zincalume steel are thermally efficient roofing materials radiating less heat into your home as they cool down faster at night.

Sagging of the sarking to facilitate drainage to the gutter is required but not more than 40mm. Lighter coloured roofs irrespective of material reflect more heat than darker shades. Vapour permeable sarking controls the risk of condensation by allowing water vapour to be. Csr recommends that all tiled roofs with a pitch of less than 20 are sarked and the bca mandates this requirement for rafter lengths greater than 4 5 metres.

Helps protect your home from unseen mould growth or even worse ceiling staining or permanent damage which can result from the entry of storm driven rain into the roof cavity. Sarking and the building code of australia. Sarking is pliable laminated membrane well that s how bradford describes anyway. The laminate must be allowed to drape between the roof supports.

Roof sarking is mandatory in all bal 12 5 to 40 rated areas to meet the bush fire ember attack requirements in accordance with australian standard 3959 where it provides a secondary form of ember protection for the roof space1. Sagging of sarking to avoid the sarking contacting the underside of the roof sheet but not more than 40mm is recommended to avoid temperature transfer from the roof sheet. A layer of sarking reflective foil laminate or rfl is then put in place.