Why You Need Sarking For Your Roof And Walls

When you do sarking on your roof and walls, you provide secondary defence from any weather penetration. It is referred to as wall wrap for your walls; however, a different material is used when you sark your roof. Even then, this process provides fine perforations so that air can pass through. The material is permitted to breath to avoid condensation between the wall wrap material and the cladding.

Thermal Insulation

The sarking for both roof and walls will modify the “R” value requirement needed for energy efficiency. The specifications of the products provided by the manufacturer will offer the “R” value included in the needed “added” value. However, the “R” value can only be accepted with the air space has a minimum of 15-mm between the wrap material and the cladding. The normal position of the sarking beneath the roof battens will offer space, but for the walls this will need fixed battens to the studs once the wall wrap is finally installed.

Construction in Bush Fire Prone Areas

If you were to construct buildings in bush fire prone areas, it will need wall wraps or sarking, so that the house can be protected by possible fires or flames. The walls need to be clad for possible attack categories. Sarking is also needed for tiled roofs for protection. It is also needed under sheet roof cladding to ensure that bush fires cannot penetrate the premises of the home. The flammability index here must not be more than five.


Sarking can be optional or mandatory depending on the needs of homeowners. Especially in bush fire prone areas, this process is badly needed. The house is protected from the wind and other catastrophes that may come its way.


Except for those living near bush fire prone areas, the manufacturer doesn’t require any specific cladding system like wall wrap or sarking to be used. The sarking of the walls will ensure that the house is protected from any weather conditions. They can provide warmth amidst the coldness and ensure ventilation and insulation during warmer seasons. The process will ensure that everyone inside the house is protected and safe from climate change.