Is Sarking Required Under Colorbond Roof

The flexible membrane is usually installed under the battens to provide thermal insulation and to prevent water and dust penetration in the roof space.

Is sarking required under colorbond roof.

Vapour permeable sarking controls the risk of condensation by allowing water vapour to be. In many installations both are installed. Sagging of the sarking to facilitate drainage to the gutter is required but not more than 40mm. 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.

While this isn t strictly compulsory in all cases sarking s generally considered to be very important for metal roofs to help prevent condensation. 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. Roof sarking is a membrane that is fitted during tile or metal roof construction.

Not only does it help your roof thrive in climate changes but it also improves the overall thermal comfort indoors. Roof sarking improves performance and comfort by providing the following benefits. A layer of sarking reflective foil laminate or rfl is then put in place. In bushfire prone areas flying embers cannot enter this space through the roof due to sarking protection.

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. 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. 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.