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Roof Drainage

This section considers the design of water drainage from the time it hits the roof cladding to the time it enters the downpipe. As the design considerations are similar, this also includes the discharge from gutters and troughs within the roof plane, valleys, internal gutters, and external spouting.

The Roof Drainage section gives guidance for compliance with NZBC Clause E1 Surface Water. It describes how to drain rainwater effectively from roofs and gutters.

/cop/roof-drainage
Revision Category: 
2 - Editing and rearrangement
Revision Detail: 

The entireĀ Roof Drainage-clause had been revised.

Draft Clause: 
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