Lysaght

Roof drainage systems should be designed and detailed by a suitably qualified trade or professional in accordance with the BCA and the Australian Standards. Particular reference should be made to the correct sizing of gutter; quantity and placement of downpipes; and the provision of appropriate overflow devices.

In the design and detailing of a roof drainage system, consideration must be given to a range of factors such as:

  • rainfall intensity
  • roof catchment area
  • gutter size/capacity
  • gutter fall
  • gutter outlets (sumps, rain heads, nozzles)
  • downpipe size, quantity and placement
  • overflow consideration
  • material selection and

You can view information on the design of roof drainage systems in the brochure for your state:

Lysaght QLD Rainwater Solutions Dec 2013 v2.pdf

Lysaght QLD Rainwater Solutions Dec 2013 v2.pdf PDF (2.2 MB). Last updated 26 Aug 2016

Available in Hard Copy 

Lysaght SA Rainwater Solutions Sep 2014b.pdf

Lysaght SA Rainwater Solutions Sep 2014b.pdf PDF (1.6 MB). Last updated 15 Jun 2017

Available in Hard Copy