Ground conditions and slabs in Marsden Park NSW

Marsden Park sits on the Cumberland Plain, where soils weather from Wianamatta Group shale into clay rich profiles that change volume with moisture through the seasons. Two things follow. Your slab is designed stiff enough to ride that movement out, which is why cover, beam widths and bar placement are worth confirming before the pour. And the vapour barrier beneath it is what keeps ground moisture out of the concrete, which is why a gap at the edge or an untaped puncture is not a small thing. We publish no site class for the suburb, because an AS 2870 class belongs to your lot and your soil report.