Determining Gutter Size

Adjusting for pitch and rainfall.

Determining gutter size.

Measuring existing gutters 1. Place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach. Rainfall intensity is measured in a 5 minute interval translated. Measure the roof to get the watershed area the area from which water will run off.

Measure the length of each gutter run. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. The steeper a roof s pitch the more windblown rain it can collect.

Get 7 or 8 inch gutters. 5 inch standard k style gutter shop 5 gutterbrush. Find the rainfall intensity for your locale. They ll cost more and probably require a custom order through a professional installer.

You have three options. How do you calculate gutter size. How to calculate gutter and downspout capacity step 1. The standard is about inch per 10 feet.

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. Increasing the pitch increases a gutter s. Find the width of the gutters. Measure the height of.

Multiply length peak to.