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Gutters · Belleair

Gutters in Belleair, FL

A 5-minute downpour in a 10-year storm falls at 9.92 inches an hour in Belleair, where the median home dates to 1974. Pinellas County's normal annual rainfall is 52.48 to 53.62 inches, and about 62 percent of it falls June through September. Gutters sized for gentle rain overflow in that burst, long before the roof fails.

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Updated October 2026

White stucco single-story building with barred windows, green lawn, and clipped hedges beside a driveway.
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: Belleair FL Town Hall03 by Ebyabe, CC BY 2.5, cropped

Sizing for local rain

Sizing Belleair gutters for the 9.92 inch burst

Plumbing code sizes horizontal gutters from the roof's flow rate, and capacity depends on width, depth and slope. A 6-inch half-round gutter at 1/8 inch per foot carries 110 gallons per minute under the state table. A 5-inch gutter carries 74, so going up one size adds about 49 percent more capacity.

The same house in the same downpour with a white seamless gutter catching the runoff and a downspout discharging onto a splash block, flower bed intact (illustration)Illustration

Illustration: downpour with gutter

Downspouts are sized separately. By the state table, a 3 by 4 1/4 inch leader handles 192 gallons per minute, while a 2 by 2 inch leader handles only 30. Many Belleair houses were built around 1974, when small leaders were common, so an older setup may be the weak point.

On a steep Belleair roof, the design area grows past the footprint. For a 12-in-12 pitch the factor is 1.30, and rain falling on a wall that drains onto the roof adds half that wall's area. Ask your installer to show these numbers for your roof.

Code and drainage

Getting roof water away from Belleair foundations

The residential code sets a 1 foot minimum between a downspout outlet and the building's sidewall, reached by underground piping, tail extensions or splash blocks. About 60.1 percent of Belleair housing units are single-family detached homes, so most owners control their own drainage.

New homes need gutters when eaves project less than 6 inches, except at gable rakes or where one roof sits above another. Belleair's building department handles roofing permits, so confirm the discharge plan there before work starts.

Keeping gutters clear

Leaves, trees and cleaning schedule in Belleair

Southern live oaks drop litter-making leaves and can grow 60 to 80 feet tall. Oak leaf drop and the March and April pollen peak both load gutters in spring. Pine needles drop heaviest in autumn, with the peak from September through November.

Florida insurer Tower Hill says to clean gutters in spring and fall at minimum. Clear them after the spring oak drop, before the June to September rain season that brings about 62 percent of Pinellas rain, and again after the autumn needle peak.

Rain on your roof

Preset: 7.13 inches, the 10-year 24-hour rain (NOAA Atlas 14 at Belleair).

8,884 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 Belleair: questions

How much rain should my gutters handle in Belleair?

Size them for the 5-minute, 10-year downpour, which NOAA Atlas 14 puts at 9.92 inches an hour at this town. The 100-year burst reaches 13.2. A 6-inch half-round gutter at 1/8 inch per foot carries 110 gallons per minute under the state plumbing table. Belleair's housing stock is largely older, with a median build year of 1974 (margin of error ±3), so many existing gutters were sized for much lighter storms and may need upgrading. Ask your installer to confirm the design area for your roof's pitch before buying.

Source: NOAA Atlas 14 Volume 9 version 2, partial-duration intensity estimates at the Belleair 2020 Census internal point (27.9360, -82.8128), read Oct 5, 2026

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Do Belleair gutters need downspouts that move water away from the house?

Yes. The residential code wants downspout outlets at least 1 foot from the sidewall. Belleair's building department handles roofing permits and requires floodproofing certification in its special flood hazard area, so confirm your drainage plan with that office.

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 I clean gutters under oaks in Belleair?

Plan a cleaning at least twice yearly, once in spring and once in fall, and schedule extra sessions if your roof sits under dense tree cover. Pinellas County gets about 62 percent of its 52.48 to 53.62 inches of normal rain from June through September, so clear gutters before June. Southern live oaks drop litter and can grow 60 to 80 feet tall.

Source: NOAA NCEI U.S. Climate Normals 1991-2020, stations USC00087886 ST PETERSBURG and USW00012873 ST PETERSBURG INTL AP, read Oct 5, 2026

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Nearby

Gutters near Belleair

Sources for this page(29)
  1. 1.Median year homes were built: 1974. U.S. Census Bureau, ACS 2024 5-year (2020-2024), table B25035, via Census Reporter API. Read Oct 5, 2026.
  2. 2.Single-family detached share of housing units: 60.1%. U.S. Census Bureau, ACS 2024 5-year (2020-2024), table B25024, via Census Reporter API. Read Oct 5, 2026.
  3. 3.Permit office: Town of Belleair - Building Department. Town of Belleair - Building Department. Read Oct 10, 2026.
  4. 4.NOAA NCEI U.S. Climate Normals 1991-2020, stations USC00087886 ST PETERSBURG and USW00012873 ST PETERSBURG INTL AP. Read Oct 5, 2026.
  5. 5.Hurricane Hermine (2016). NOAA National Hurricane Center, Tropical Cyclone Report: Hurricane Hermine. Read Oct 5, 2026.
  6. 6.Town of Belleair, Building Department (official). Read Oct 5, 2026.
  7. 7.2023 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").
  8. 8.bergerbp.com. Read Oct 5, 2026.
  9. 9.2023 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).
  10. 10.2023 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").
  11. 11.2023 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).
  12. 12.ask.ifas.ufl.edu. Read Oct 5, 2026.
  13. 13.blogs.ifas.ufl.edu. Read Oct 5, 2026.
  14. 14.ufdcimages.uflib.ufl.edu. Read Oct 5, 2026.
  15. 15.thig.com. Read Oct 5, 2026.
  16. 16.U.S. Census Bureau, ACS 2024 5-year (2020-2024), table B25035, via Census Reporter API, U.S. Census Bureau (via Census Reporter). Read Oct 5, 2026.
  17. 17.Town of Belleair - Building Department, townofbelleair.com. Read Oct 5, 2026.
  18. 18.NOAA Atlas 14 Volume 9 version 2, partial-duration intensity estimates at the Belleair 2020 Census internal point (27.9360, -82.8128), NOAA Hydrometeorological Design Studies Center. Read Oct 5, 2026.
  19. 19.NOAA National Hurricane Center, Tropical Cyclone Report: Hurricane Hermine, NOAA National Hurricane Center. Read Oct 5, 2026.
  20. 20.NOAA Atlas 14 Volume 9 version 2, partial-duration 24-hour depth estimates at the Belleair 2020 Census internal point (27.9360, -82.8128), NOAA Hydrometeorological Design Studies Center. Read Oct 5, 2026.
  21. 21.U.S. Census Bureau, ACS 2024 5-year (2020-2024), table 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.Pinellas County, "Building Departments in Pinellas County" (official), Pinellas County. Read Oct 5, 2026.
  24. 24.2023 Florida Building Code, Building, 8th ed., Chapter 15 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
  25. 25.City of St. Petersburg; City of Tarpon Springs (official); Wikipedia (St. Pete Beach), City of St. Petersburg. Read Oct 5, 2026.
  26. 26.NWS Melbourne, Lightning Facts and Trivia, National Weather Service. Read Oct 5, 2026.
  27. 27.Wikipedia, "Belleair, Florida" (secondary source), Wikipedia. Read Oct 5, 2026.
  28. 28.2023 Florida Building Code, Building, 8th ed., Chapter 1 (UpCodes viewer, unofficial transcription), UpCodes (Florida Building Code transcription). Read Oct 5, 2026.
  29. 29.NOAA Atlas 14 at Belleair: 9.92 in/hr (5-minute, 10-year). NOAA Atlas 14 Precipitation Frequency Data Server. Read Oct 5, 2026.

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Gutters in Belleair

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