Pitched Roof Sarking Insulation

7 2 14 underlay and sarking.

Pitched roof sarking insulation.

Usually this construction is a ventilated roof which will have sarking felt. To create a warm pitched roof insulation such as kingspan kooltherm k7 pitched roof board should be fitted between and over the rafters. Where the roof pitch is 15 or more. Sarking and the building code of australia.

Unilin offers sarking as solution for insulating your pitched roof. 7 2 15 ventilation vapour control and insulation. Unilin sarking boards are used to insulate a pitched roof from the outside. 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.

A house roof is a fairly complicated structure made up of joist battens trusses and the roof cover such as corrugated sheet metal. 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. Aside from the structural components it is fitted with insulation and roof sarking. Ventilated roofs require a 50 mm air gap above the insulation.

What is roof sarking. Pitched roofs that have insulation at ceiling level should be ventilated to the outside air. The great advantage compared to insulating from the inside is the uninterrupted insulation shield and the exclusion of thermal bridges. For pitched roofs below 20 degrees with a slate or tile covering the roof build up is the same as for the steeper pitches but all of the joints of the wood fibre sarking boards must be taped or sealed to prevent water penetrating the joints.

They needn t be used in every application and instead their use largely depends on where in the country you are based and what type of construction you are building.