BU511 Residential roof drainage design
- Abbreviation
- BU511(2009)
- Valid from
- 1/06/2009
- Information provider
- BRANZ Limited,
- Information type
- BRANZ Bulletin,
- Format
- PDF,
Description
This bulletin covers design principles for roof drainage for residential buildings that can be applied across a range of roof styles and cladding types.
Scope
The bulletin covers:
- key design considerations, including rainfall, wind and wind pressure, roof geometry, roof slope, structural movement, roof material span and maintenance
- drainage mechanisms and water collection, including valley gutters, flashings, changes of slope and penetrations
- maintenance.