The GDO is now go!

Wednesday, 12 April 2017 Image of a residential houses gutter and downpipe

The Gutters, Downpipes and Overflow (GDO) Calculator is now available.

The calculator assists in developing a better understanding of the NCC Volume Two, Part 3.5.2 Gutters and Downpipes Acceptable Construction Practice (ACP) provisions.

Using the GDO Calculator is easy

To use the calculator simply enter information about the location, roof design and types of overflow measures, and the calculator will provide the gutter type/s required, allowable downpipe sizes and whether the selected overflow measures are adequate.

The Calculator is a MS Excel 2013 for Windows file and uses data contained in NCC Volume Two.

Thank you

Thank you to interested stakeholders for your valuable feedback on the Beta version of the calculator.

Download the calculator and try it for yourself!