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Gutters · Bay Harbor Islands

Gutters in Bay Harbor Islands, FL

On Bay Harbor Islands, a 10-year storm can drop rain at 11 inches an hour for five minutes. The 25-year burst reaches 13 inches an hour and the 100-year burst 16.1. Your gutters and downspouts have to move that water. The median home here dates to 1970, so many drainage systems are likely old.

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Updated October 2026

Two blue tennis courts beside a blue and white building, viewed from above on a sunny day.
Drone view of a single-story home with a brown-gray shingle roof and box vents under large oak trees, a metal carport roof in the corner and a street behind.Our work
Photo: Tennis Court in Bay Harbor Islands 2 by SurfBalBay News, CC BY-SA 4.0, cropped

Rain and sizing

Sizing gutters for island rain in Bay Harbor Islands

Size gutters for the rain rate here, not the yearly total. At this town, a 1-hour rain in a 10-year storm falls at 3.44 inches an hour. The 24-hour total reaches 8.61 inches in that same storm.

Close three-quarter view of a new white seamless K-style aluminum gutter along the eave of a single-story stucco ranch home with a dark shingle roof, live oaks and cumulus sky behind (illustration)Illustration

Illustration: seamless k style white

Plumbing code Table 1106.6 rates gutters by flow. A 6-inch half-round gutter at 1/8 inch per foot slope carries 110 gallons per minute, about 49 percent more than a 5-inch one at 74. A 5-inch gutter that suits a low roof may fall short on a steep one.

Pitched roofs need a larger design area. The code multiplies roof plan area by a factor that rises with pitch, from 1.00 for level roofs to 1.30 at 12 in 12. Use the steeper factor when measuring a roof here.

Discharge rules

Downspout placement and where the water goes

Eaves that project less than 6 inches trigger a code requirement for gutters and downspouts in the Florida Building Code, Residential. Each downspout must end at least 1 foot off the sidewall, using piping, a tail extension or a splash block.

Bay Harbor Islands was built on filled former mangrove islands, and only 13 percent of housing units are single-family detached. Water that lands at a foundation can seep under the slab. Confirm your downspout route with the Town building office before you change it.

Rain on your roof

Preset: 8.61 inches, the 10-year 24-hour rain (NOAA Atlas 14 at Bay Harbor Islands).

10,728 gallons run off that roof, all of it toward the gutters and downspouts.

Math: square feet × inches × 0.623 gallons.

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Questions

Gutters in Bay Harbor Islands: questions

How big should gutters be for a Bay Harbor Islands home?

Size them for the rain rate here, not an average. A 100-year, 5-minute burst falls at 16.1 inches an hour in Bay Harbor Islands, and a 10-year burst at 11. A 6-inch half-round gutter at 1/8 inch per foot carries 110 gallons per minute under the plumbing code. Steep roofs and walls that shed water onto the roof need a larger area. Measure your roof and check the sizing table with the building office.

Source: NOAA Atlas 14 Volume 9 version 2, partial-duration intensity estimates at the Bay Harbor Islands 2020 Census internal point (25.8880, -80.1336), read Oct 5, 2026

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Do gutters need downspouts on my Bay Harbor Islands home?

The residential code requires them where eaves project less than 6 inches, except at gable end rakes or on a roof above another roof. The downspouts must end at least 1 foot from the sidewall. Only 13 percent of units here are single-family detached, so many buildings fall under other rules. Confirm how this applies to your building with the Town of Bay Harbor Islands.

Source: 2023 Florida Building Code, Residential, 8th ed., R318.5 (UpCodes viewer, unofficial transcription); FBC-Building 1503.7, read Oct 5, 2026

Related: Gutters

How often should gutters be cleaned in Bay Harbor Islands?

Plan on spring and fall at minimum, and add a check before June. Miami-Dade gets 67.41 inches of rain a year at Miami International Airport, and 76.6 percent of it falls May through October. Live oak leaves are a litter problem, and pollen peaks in March and April. Check after a heavy storm, since NOAA lists June as the wettest month at 10.51 inches.

Source: thig.com, read Oct 5, 2026

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Nearby

Gutters near Bay Harbor Islands

Sources for this page(29)
  1. 1.Wikipedia, 'Bay Harbor Islands, Florida' (revision 1373541642). Read Oct 5, 2026.
  2. 2.Single-family detached share of housing units: 13%. U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25024, via Census Reporter API. Read Oct 5, 2026.
  3. 3.Permit office: Town of Bay Harbor Islands - Apply for a Construction Related Permit. Town of Bay Harbor Islands - Apply for a Construction Related Permit. Read Oct 10, 2026.
  4. 4.Median year homes were built: 1970. U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, via Census Reporter API. Read Oct 5, 2026.
  5. 5.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, via Census Reporter API. Read Oct 5, 2026.
  6. 6.NOAA NCEI U.S. Climate Normals 1991-2020 (access data service). Read Oct 5, 2026.
  7. 7.NOAA NCEI U.S. Climate Normals 1991-2020 (access data service). Read Oct 5, 2026.
  8. 8.NOAA Atlas 14 (HDSC Precipitation Frequency Data Server). Read Oct 5, 2026.
  9. 9.2023 Florida Building Code, Plumbing, 8th ed., Chapter 11 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from COM-20 (the research cites it "as COM-20").
  10. 10.bergerbp.com. Read Oct 5, 2026.
  11. 11.2023 Florida Building Code, Residential, 8th ed., R318.5 (UpCodes viewer, unofficial transcription); FBC-Building 1503.7. Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7).
  12. 12.2023 Florida Building Code, Residential, 8th ed., Chapter 8 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7). Source URL inherited from NC-2 (the research cites it "as NC-2").
  13. 13.2023 Florida Building Code, Residential, 8th ed., Chapter 3 (UpCodes viewer, unofficial transcription). Read Oct 5, 2026. FBC text read from UpCodes (unofficial transcription): check floridabuilding.org or the ICC viewer before quoting (spec 8.7).
  14. 14.thig.com. Read Oct 5, 2026.
  15. 15.ask.ifas.ufl.edu. Read Oct 5, 2026.
  16. 16.blogs.ifas.ufl.edu. Read Oct 5, 2026.
  17. 17.NOAA Atlas 14 Volume 9 version 2, partial-duration intensity estimates at the Bay Harbor Islands 2020 Census internal point (25.8880, -80.1336), NOAA Hydrometeorological Design Studies Center. Read Oct 5, 2026.
  18. 18.NOAA Atlas 14 Volume 9 version 2, partial-duration 24-hour depth estimates at the Bay Harbor Islands 2020 Census internal point (25.8880, -80.1336), NOAA Hydrometeorological Design Studies Center. Read Oct 5, 2026.
  19. 19.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25024, via Census Reporter API, U.S. Census Bureau (via Census Reporter). Read Oct 5, 2026.
  20. 20.Town of Bay Harbor Islands - Apply for a Construction Related Permit, Town of Bay Harbor Islands. Read Oct 5, 2026.
  21. 21.U.S. Census Bureau, American Community Survey 2024 5-year estimates (2020-2024), table B25035, B25034, B25024, via Census Reporter API, U.S. Census Bureau (via Census Reporter). Read Oct 5, 2026.
  22. 22.Citizens Property Insurance Corporation, inspections FAQ (updated 2026-03-17), Citizens Property Insurance. Read Oct 4, 2026.
  23. 23.2023 Florida Building Code, Building, 8th ed., Chapter 15 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
  24. 24.2023 Florida Building Code, Building, 8th ed., Chapter 1 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
  25. 25.Florida Building Commission, 'Setting New Standards for Safety: The Florida Building Code' (2004 publication; wind-speed figures in it are outdated and not used), Florida Building Commission. Read Oct 5, 2026.
  26. 26.NOAA National Hurricane Center, Tropical Cyclone Report: Hurricane Irma (AL112017), NOAA National Hurricane Center. Read Oct 5, 2026.
  27. 27.NOAA National Hurricane Center, Tropical Cyclone Climatology, NOAA National Hurricane Center. Read Oct 5, 2026.
  28. 28.Wikipedia, 'List of municipalities in Florida', Wikipedia. Read Oct 5, 2026.
  29. 29.NOAA Atlas 14 at Bay Harbor Islands: 11 in/hr (5-minute, 10-year). NOAA Atlas 14 Precipitation Frequency Data Server. Read Oct 5, 2026.

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Gutters in Bay Harbor Islands

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