Oklahoma Gutter Sizing:

Your Guide to the Perfect

Drainage System

Understanding the importance of the right gutter size to protect your home against Oklahoma's weather

The Right Gutters Matter: Protecting Your Oklahoma Home

Gutters are a vital shield for your home, diverting rainwater away from its foundation. But with different sizes available, how do you make the right choice for Oklahoma's unique weather patterns? Innotek Seamless is here to guide you.


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Oklahoma's Rainfall:

Heavy Downpours

Demand the Right System

Oklahoma experiences lower annual rainfall averages than many states. However, those downpours tend to be heavy and intense when they do happen. An undersized gutter system simply can't cope with this style of rainfall, leading to overflows and potential damage.

5-Inch Gutters

with Oversized 3x4 Downspouts

– Our Winning Combo

Through years of experience, we've found that 5-inch gutters paired with oversized 3x4 downspouts deliver exceptional protection for most homes in the Lawton to OKC metro area. Here's why.

  • 5-Inch Gutters: These gutters strike a balance between capacity and aesthetics. They handle significant water flow for most roofs without appearing bulky.

  • 3x4 Downspouts: Larger downspouts are crucial in Oklahoma. They rapidly drain the sudden rush of water from the gutters, minimizing overflow risk and protecting your foundation.


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Choosing The Right Sized Downspouts

Choosing the correct size downspouts for your gutter system is crucial to ensure efficient drainage. The size depends on the roof's size and slope, and the region's average rainfall. Larger downspouts handle more water volume and reduce the risk of clogs. Consult a professional to determine the appropriate size for your home's specific needs.

Downspout Waterflow Chart

Measured in Gallons Per Minute

2x3 Downspouts

A 2x3 inch downspout can drain up to 6 gallons of water per minute (GPM) in ideal conditions. This calculation is based on the assumption that one square inch of downspout cross-sectional area can drain 1.25 gallons of water per minute, which is a commonly used rule of thumb in the industry1. The cross-sectional area of a 2x3 downspout is approximately 4.8 square inches (2 inches x 3 inches = 6 square inches for a rectangular downspout, but we must consider it as a cylindrical pipe for water flow, so we adjust the value to 4.8 square inches). Therefore, 4.8 square inches x 1.25 GPM/square inch = 6 GPM.

3x4 Downspouts

A 3x4 inch downspout can drain up to 15 gallons of water per minute (GPM) in ideal conditions. This calculation is based on the assumption that one square inch of downspout cross-sectional area can drain 1.25 gallons of water per minute, which is a commonly used rule of thumb in the industry1. The cross-sectional area of a 3x4 downspout is approximately 12 square inches (3 inches x 4 inches = 12 square inches for a rectangular downspout, but for water flow we consider it as a cylindrical pipe, so we adjust the value to 12 square inches). Therefore, 12 square inches x 1.25 GPM/square inch = 15 GPM.

Why This Works

Across the Region

While every home has specific needs, this combination offers the versatility to handle Oklahoma's unpredictable weather patterns for most residential properties between Lawton and the Oklahoma City metro.

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Without the Hassle

Contact Innotek Seamless today for a free quote and unlock a brighter, more protected future for your home!

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