Calculate Box Gutter Size

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

Calculate box gutter size.

Learn more how to storm water design for building sites. 6 inch 7 960 square feet. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Sides must be vertical.

A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour. Doubling the number of downspouts halves the required capacity for each. Box gutters must be straight no bends. Size downspouts to fit the gutter.

Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head. 5 inch standard k style gutter shop 5 gutterbrush. We recommend using this calculator as a basic tool to begin determining the requirements for your drainage system however all information should be verified by. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.

Must have a constant slope between 1 40 and 1 200. Sizes the depth shown of the box gutter is the depth at the upstream end. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Northclad gutter size requirement calculator this calculator uses current data to calculate the required size of gutter as well as number and size of downspouts based on your input.