Professional Exterior Mould & Algae Removal in Mosman & the Lower North Shore

Exterior mould and algae removal targets the green and black organic growth that builds up on outdoor surfaces across Sydney's humid, shaded properties. Driveways, paths, walls, roofs, pavers and sandstone all collect it — and beyond looking unsightly, it makes surfaces slippery and holds moisture that can damage the material beneath.

We combine pressure cleaning with a biocide treatment: the physical wash lifts the visible growth, and the biocide kills it at the root so it's slower to return. On delicate surfaces like sandstone and render we lead with the biocide and use low pressure; on hard concrete we can use more pressure where appropriate. The aim is a clean, safe surface and a longer gap before the growth comes back. Because mould thrives in shade and moisture, we'll also point out areas where trimming back foliage or improving drainage could help — honest, practical advice from Tommy rather than a one-size-fits-all service.