Roof Sarking

Roof sarking is a protective second skin under your roof, installed when building a house, doing home extensions, a home renovation or roof restoration.

Roof sarking is a pliable laminated membrane that is positioned under your roof during installation by the builder and is rolled out in sections either parallel or perpendicular to the eaves with an overlap between each layer.

Roof sarking will protect the frame of your house from the weather during construction. When your home is completed, sarking will protect your roof cavity from storm driven rain and dust, improve its thermal performance, help it resist bushfire ember attack and reduce the risk of harmful condensation.

Benefits of Roof Sarking

What's so good about roof sarking? 

Your home will feel more comfortable and you’ll feel assured knowing that sarking can provide protection for the things you value, when you need it most.

How roof sarking helps to protect your home once it is completed:

  • Improves thermal performance by shielding the home from up to 97% of radiant heat when combined with an air-space, helping to provide a more energy efficient and comfortable home
  • Vapour permeable sarking reduces the risk of condensation formation, by allowing water vapour to be effectively managed and safely drained away
  • All 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
  • Limits dust entering the home through gaps around down lights and vents by reducing draughts that blow dust into the roof space
  • 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 space
How roof sarking can protect your home during construction:
  • Protects the building structure from the weather prior to the application of the roof, which limits water damage to internal structural components
  • Improves on-site work flow efficiency by allowing some internal trades to commence work before the roof is applied

The possible consequences of condensation

In colder climates the risk of condensation formation increases as the outside temperature falls, and the inside of the home is heated. The possible consequences of condensation formation include:

Health Risks: Unseen mould growth behind wall and ceiling linings, and external cladding can be a health risk to the occupants, particularly the young or elderly

Visual Deterioration: Deflection or staining of plasterboard linings as a result of moisture trapped behind the linings can cause ugly stains and swelling of standard plasterboard

Structural Decay: Moisture trapped within the structure can result in long term corrosion of metal structures, timber rot, loosening of nails as timber swells, and cladding rot or swelling which can result in costly rectification work

Energy Efficiency: A reduction in the buildings energy efficiency can occur due to moisture saturation of the insulation, which can result in loss of thermal performance.

Selection Guide
Permeability Performance Comparison
Applications
Thermoseal Roof Sarking
Enviroseal ProctorWrap
Roof Sarking Fixing Tapes
Managing the risk of condensation
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