How Big Of Gutter Do I Need

Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed.

How big of gutter do i need.

Calculate your roof. You ll also need to. You can measure pitch with a. Measure your gutter across the top from the back where the gutter meets the home to the outer edge.

Once you know the total square footage of drainage for each gutter you ll need to adjust for the following two factors. They can be 4 5 or 6 inches. 5 inch standard k style gutter shop 5 gutterbrush. Consider your drainage area.

A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour. How do you calculate gutter size. Gutters come in different sizes. How do you do the math to figure out how large your gutters should be.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. 5 gutters and 6 gutters can both be used together for different areas. Most homes can be satisfied with 5 gutters. The steeper a roof s pitch the more windblown rain it can collect.

See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Downspouts also come in. Adjusting for pitch and rainfall. Houses with larger roofs may require 6 gutters because they flow more water.

What size gutters do you need.