Ground conditions and slabs in Oran Park NSW
Two things about the ground under Oran Park are worth holding together. The first is regional: the suburb sits on the Cumberland Plain, where soils weather from Wianamatta Group shale into clay rich profiles that change volume with moisture. The second is local: this land was a motor racing circuit until 2010, so much of it has been cut, filled and regraded. Neither fact tells you what your lot is. Both are reasons to read the soil report your builder commissioned, because it is the document your slab was designed from, and we will not publish a site class for the suburb in its place.
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The suburb lies on the Cumberland Plain over Wianamatta Group shale.
The weathered layer near the surface is mostly clay, which moves as its moisture content changes.
The site was a racing circuit until 2010 and has been substantially reshaped.
Engineered fill and cut ground vary lot by lot, which is what a soil report captures.
AS 2870 site class comes from your lot's soil report, never from a suburb average.
More about Oran Park
- Building a new home in Oran Park NSW
- Buying a home in Oran Park NSW
- Growth and development in Oran Park NSW
- Certifiers, council and building disputes in Oran Park NSW
- Termite collars at slab stage in Oran Park NSW
- Common building defects in Oran Park NSW
- Insulation at lock-up in Oran Park NSW
Written by our local inspection team from work carried out in Oran Park. Licensed building practitioners.
