Sandstone care in Duffys Forest

Duffys Forest is named after Patrick Duffy, who received a land grant there in 1857, worked as a timber cutter, cleared a road to Cowan Creek and built a stone wharf to ship his timber. Duffys Wharf and Duffys Track still carry his name. The best-known site is Waratah Park on Namba Road, the filming location for Skippy the Bush Kangaroo, which is now on the State Heritage Register. Only about 500 people lived here at the 2021 census, mostly on acreage blocks of one to two hectares along roads such as Booralie, Anembo and Guwara, some with horse facilities and paths into the adjoining national park. Sandstone appears in retaining walls, terraces, steps and natural outcrops around the house.

Duffys Forest is surrounded by bushland, and that shapes everything about how stone weathers here. The local vegetation includes the Duffys Forest ecological community, an endangered community that grows on ridgetops and plateaus with lateritic soils. Heavy leaf fall leaves tannin stains on paving, and the shade cast by tall trees keeps walls and steps damp, encouraging black mould, algae, moss and lichen. Iron-rich soil washed onto stone in storms leaves orange-brown marks. Bushfire smoke and ash from hazard-reduction burns can coat terraces with a grey film. Because properties are large and stone is spread across them, small problems tend to grow for years before they are dealt with.

Duffys Forest was part of the former Warringah Council area, so heritage matters are assessed by Northern Beaches Council under the Warringah Local Environmental Plan 2011. Waratah Park at 13 Namba Road was added to the State Heritage Register in 2015; work on a State-listed place can need separate approval under the Heritage Act. No heritage conservation area for Duffys Forest appeared in our research, and for other properties, checking the heritage schedule for your address is a sensible first step before restoration. Most lots in the suburb are close to national park, and council's bush fire prone land map is worth consulting before any landscaping changes. Our cleaning keeps all products and wash water within your boundary.

A trip to Duffys Forest from Double Bay is roughly 45 to 55 minutes for us, via Mona Vale Road and Terrey Hills. Properties are spread out, often with long driveways and gates, so we confirm access and where the vehicle can be parked near the work. Many homes rely partly on tank water, and we plan water use accordingly and keep it low. Where horses, dogs or other animals are on site, we agree where they will be during the job. Stone near the national park boundary is cleaned with particular care: run-off is bunded and collected, no products are sprayed toward native vegetation, and wash water is taken away rather than left to soak into the ground.