Building Officials Association of Florida
Protecting Lives and Property since 1953

Interpretation #9592

Published October 23, 2026

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Original Request

Code Version
2023
Code
PLUMBING
Code Description
Chapter
11
Section
1108.1 Secondary (emergency overflow) drains or scuppers
Topic
Secondary roof drain requirements

Question

Is a separate secondary emergency overflow drain required for each primary roof drain, or may water from a roof area with a blocked primary drain be designed to flow into an adjacent roof area served by another secondary drainage point?

Answer Published 10/02/2026 at 9:18 AM

Yes, the code requires secondary emergency overflow drains, any deviation from the code requirement would be an alternative and should be treated as such.

Commentary

None.