COP:roof-drainage

View Whole Section for Roof Drainage

The Roof Drainage section coincides with the NZBC Clause E1 Surface Water. It describes how to drain rainwater from roofs quickly and effectively. Topics include:

  • Rainfall Intensity
  • Roof Pitch for Drainage
  • Gutter and Downpipe Design
  • Gutter and Downpipe capacity calculations.