Roof Sarking – what is it and why is it in my house?
Different builders may or may not include roof sarking in your new home. But do you know what sarking is? Do you really need sarking in your new home, and what does it even do?
What is roof sarking?
Sarking is an additional protective layer that is added your roof. It sits under the tiles, colorbond or other roofing material and on top of the rafters. There are many different kinds of sarking that serve similar but varying purposes.
Is it worthwhile having sarking in my new home?
Yes! At Simone Homes, we include sarking as standard because while it may not be compulsory for all new homes we think it is definitely worthwhile having.
Roof sarking is mandatory in some instances. New homes that are situated in areas that have a BAL rating of 12.5 to 40, for example, require sarking to meet the bush fire ember attack requirements in accordance with Australian Standard 3959. It helps by providing a secondary form of ember protection for the roof space. (Source)
What does roof sarking do?
Sarking can do several things (but it does depend on the type used and how it is installed):
- First and foremost, it acts as a form of water protection. There are permeable and non-permeable available. Permeable type allows water vapour to pass through but both prevent liquid water from getting into the roof cavity. Sarking goes on to help deter mould growth and structural deterioration that may be caused when storm driven rain gets through the initial roof covering over a long period of time.
- It prevents excess dust from getting into your home. Strong winds can drive dust through the natural gaps in your roof and if you have downlights or vents this dust can then get into your living spaces.
- It can improve thermal performance. Depending on how it is installed, sarking can protect the home from radiant heat. This protection will keep your home cooler, increasing your energy efficiency.