How Big Of Gutter Do I Need

5 inch standard k style gutter shop 5 gutterbrush.

How big of gutter do i need.

Gutters come in different sizes. How do you do the math to figure out how large your gutters should be. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Size downspouts to fit the gutter.

A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour. Most homes can be satisfied with 5 gutters. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. Roof pitch factor the steeper a roof s pitch the more windblown rain it can collect.

Consider your drainage area. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. They can be 4 5 or 6 inches. You ll also need to.

Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed. Calculate your roof. Gutters come in different sizes. 5 gutters and 6 gutters can both be used together for different areas.

Adjusting for pitch and rainfall. Houses with larger roofs may require 6 gutters because they flow more water. The steeper a roof s pitch the more windblown rain it can collect. Once you know the total square footage of drainage for each gutter you ll need to adjust for the following two factors.

How do you calculate gutter size.