Is Sarking Required Under Colorbond Roof

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.

Is sarking required under colorbond roof.

You can prevent condensation dripping off the underside of metal roofing onto the ceiling by installing sarking under the metal roof or closing the vents at night to prevent night air from entering the roof space. Sarking and the building code of australia. Commonly referred to as sarking. 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 improves performance and comfort by providing the following benefits. Sagging of the sarking to facilitate drainage to the gutter is required but not more than 40mm. 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.

This video answer the question what is sarking. Vapour permeable sarking controls the risk of condensation by allowing water vapour to be. Lighter coloured roofs irrespective of material reflect more heat than darker shades. 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.

Colorbond steel and zincalume steel are thermally efficient roofing materials radiating less heat into your home as they cool down faster at night. A layer of sarking reflective foil laminate or rfl is then put in place. Sarking is pliable laminated membrane well that s how bradford describes anyway.