Sandstone and travertine care in Elanora Heights

Elanora Heights grew from the Elanora Heights Estate of 1929 on the hill above Narrabeen, and many homes look out over the lagoon, the bush or the ocean. Garigal National Park lies to the south-west and bushland runs north toward Ku-ring-gai Chase, while Elanora Country Club, opened in 1922, and the Monash course give the suburb two golf courses. Kalang Road has a small village of shops near Elanora Heights Public School, and Powder Works Road links the ridge with the coast. Housing is mostly detached, from older beach shacks to some of the largest homes in Pittwater, often on generous blocks. Stone appears as terraced retaining walls, driveway edging, entry stairs, pool surrounds and paved outdoor rooms.

Bush on the doorstep shapes how stone ages here. Eucalypts and other garden trees drop leaves, bark and gum nuts onto paving all year, and once wet they bleed brown tannin that soaks into porous sandstone and the open holes of travertine. South-facing walls and steps under canopy can go weeks without drying, which lets black mould, green algae and moss settle in, and lichen spreads across capping stones. Many blocks are cut into the slope, so retaining walls hold back damp soil and show tide marks where water seeps through. On steep driveways and paths, a film of growth after rain becomes a real slip hazard, especially on smooth sawn stone.

Elanora Heights was within the former Pittwater Council area, so Northern Beaches Council assesses heritage matters for the suburb under the Pittwater Local Environmental Plan 2014. We did not locate a heritage conservation area here, and individual listings, if any, would appear in Schedule 5 of that plan, so check your address before planning restoration rather than routine cleaning. Clause 5.10 allows council to confirm in writing that minor maintenance needs no consent. Lots on the bushland edge may also appear on council's published bush fire prone land map, though that mainly affects building and landscaping work rather than cleaning. Our run-off stays on site because local drains feed creeks running down to the lagoon.

Our technicians allow 45 to 55 minutes to reach Elanora Heights from Double Bay, usually via Pittwater Road and up through Narrabeen or along Powder Works Road. Driveways here can be long and steep, so we check whether our vehicle can get close or whether equipment needs to be walked down. Large homes with several terrace levels are usually booked over two or more days: one for cleaning, a gap for drying under the trees, and a second for sealing. Gutters, pool skimmers and garden beds are protected before work begins, because leaf litter loosened by brushing ends up everywhere. Where wildlife such as wallabies or bandicoots use the garden, we keep gates closed and products contained until surfaces are rinsed and dry.