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The importance of stormwater management

Sydney Opera House on a clear day

Stormwater is the rain that runs off roofs, driveways and paved areas. In a city as built-up as Sydney there is less open ground to absorb it, so every new building and every extension changes how water moves across the land.

What poor management costs

  • Flooding of the building itself, its basement or its neighbours.
  • Erosion, scouring and undermining of footings and retaining walls.
  • Damp, mould and deterioration of the structure over time.
  • Pollution of creeks, rivers and the harbour from untreated runoff.
  • Refused or delayed development approvals.

What good management delivers

A properly designed drainage system protects the structure, keeps water off adjoining land, treats runoff where required and gives the council the confidence to approve the development. It is one of the least visible parts of a building and one of the most important.

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