Determining Gutter Size

Measure the length of each gutter run.

Determining gutter size. Run the tape measure from 1 corner of the gutter as far as you can go toward. Find the width of the gutters. Ratio of depth to width of gutter select gutter ratio 0 125x 0 25x 0 375x 0 5x 0 625x 0 75x 0 875x 1x 1 125x 1 25x 1 375x 1 5x 1 625x 1 75x 1 875x 2x calculate drainage reset. They ll cost more and probably require a custom order through a professional installer.

Measure your gutter across the top from the back where the gutter meets the home to the outer edge. 5 inch standard k style gutter shop 5 gutterbrush. Adjusting for pitch and rainfall. Multiply length peak to.

You have three options. How to calculate gutter and downspout capacity step 1. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. Measure the roof to get the watershed area the area from which water will run off.

Measure the height of. The steeper a roof s pitch the more windblown rain it can collect. The standard is about inch per 10 feet. How do you calculate gutter size.

Increasing the pitch increases a gutter s. Measuring existing gutters 1. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Find the rainfall intensity for your locale.

Place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach.