Limestone Cleaning in Dover Heights

In Dover Heights the limestone cleaning work is mostly on rendered facades, frameless glass. 1950s to 1970s brick and rendered homes, many rebuilt as large modern houses with glass balustrades facing the ocean. The defining problem here is ocean-facing glass and render that salt-etches and blackens faster than anywhere inland, which decides the chemistry, the pressure and how often the surface needs attention.

We work around Rodney Reserve, Dudley Page Reserve and the Diamond Bay clifftop walk, on streets such as Military Road, Blake Street, Napier Street and Liverpool Street. Salt spray is the dominant force on Dover Heights exteriors. Glass hazes within weeks, render streaks under sills and fixings rust-run within a season, and black algae colonises the shaded southern walls. We schedule Dover Heights homes on quarterly glass and six to twelve-monthly soft-wash cycles rather than waiting for the grime to become visible.

Woollahra Municipal Council. Woollahra has one of the highest concentrations of heritage-listed homes and Heritage Conservation Areas in Sydney. Many properties feature original sandstone, slate and terracotta that must be cleaned with low-pressure, chemical-controlled methods. Council also enforces strict stormwater rules: wash water cannot be discharged into gutters that drain to the harbour.