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A concrete slab is a flat, poured section of concrete used to create a stable surface for buildings, vehicles and outdoor areas. In Sydney, slabs support everything from garages and sheds to patios, paths and pool surrounds. Their performance depends not only on the concrete itself, but also on the ground beneath it, drainage, reinforcement and how the site is prepared. Understanding these factors helps property owners plan a slab that suits its intended use and local co

Efflorescence on concrete usually appears as a white, pale grey or sometimes slightly yellowish deposit on the surface. It may look like powder, a thin crust, streaks, cloudy patches or a chalky film. On darker concrete, the contrast can make it especially noticeable. The deposit is generally dry and mineral-like, rather than glossy or greasy. In Sydney, efflorescence can show up on concrete driveways, paths, crossovers, patios, pool surrounds and other outdoor surfaces.