Is Sarking Required Under Colorbond Roof

Commonly referred to as sarking.

Is sarking required under colorbond roof.

While this isn t strictly compulsory in all cases sarking s generally considered to be very important for metal roofs to help prevent condensation. 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. 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.

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. 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. Sagging of the sarking to facilitate drainage to the gutter is required but not more than 40mm. What is roof sarking.

A layer of sarking reflective foil laminate or rfl is then put in place. Sarking and the building code of australia. This video answer the question what is sarking. The laminate must be allowed to drape between the roof supports.

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. 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. Roof sarking improves performance and comfort by providing the following benefits.