Catchment area (effective) (roof drainage)

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Example.jpg

  • Area to be drained within a roof. Unit of measurement is in square meter (m^2).
  • Catchment area can be a flat or sloping roof/ surfaces and also includes vertical surfaces.
  • Effective catchment area for vertical surfaces

Single wall shall be 50% of its total surface area up to a maximum exposed height of 33feet (10metres).