Is Sarking Required Under Colorbond Roof

In many installations both are installed.

Is sarking required under colorbond roof.

Sarking is not mandatory however it helps to protect your roof frames from acquiring moulds stains and other decaying issues. Sarking and the building code of australia. 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. Ventilated roof spaces in high humid climates like queensland that are under metal roofs can result in excessive condensation within the roof space at night.

Not only does it help your roof thrive in climate changes but it also improves the overall thermal comfort indoors. Roof sarking is a membrane that is fitted during tile or metal roof construction. Roof sarking improves performance and comfort by providing the following benefits. The other type is called underlayments aka sarking.

A layer of sarking reflective foil laminate or rfl is then put in place. 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. 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. While this isn t strictly compulsory in all cases sarking s generally considered to be very important for metal roofs to help prevent condensation.

Sagging of the sarking to facilitate drainage to the gutter is required but not more than 40mm. Vapour permeable sarking controls the risk of condensation by allowing water vapour to be. The flexible membrane is usually installed under the battens to provide thermal insulation and to prevent water and dust penetration in the roof space.