Steel mesh laid over moisture vapour barrier ready for concrete to be poured to form slab.

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In addition to the information I provide for designing and drafting your own house, I have another side project that tells you how long a house or land has been For Sale or Rent in Australia.
It is also Free to Use and also has a search to give you a price range indication of house and land for sale that doesn't have a listed price.
It is called Get House Date www.gethousedate.com.au Mobile Friendly too.