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This Practice Note provides guidance on roof sizing and calculations for a complete roof drainage system; and:
- The steps required when sizing a roof catchment drainage system
- Design example of a roof catchment drainage system
- Typical types of roof catchment installations
- How to calculate roof sizing
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Version history
Category
Roof plumbing
Document number
06
Version
2.0
Published
4 May 2023
Superseded versions
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