Determining Gutter Size

Increasing the pitch increases a gutter s.

Determining gutter size.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. Get 7 or 8 inch gutters. Multiply length peak to. They ll cost more and probably require a custom order through a professional installer.

Run the tape measure from 1 corner of the gutter as far as you can go toward. How to calculate gutter and downspout capacity step 1. Measuring existing gutters 1. The standard is about inch per 10 feet.

Measure the height of. How do you calculate gutter size. Adjusting for pitch and rainfall. Increase the pitch of the gutter.

You have three options. Find the width of the gutters. The steeper a roof s pitch the more windblown rain it can collect. Place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach.

Measure your gutter across the top from the back where the gutter meets the home to the outer edge. 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. 5 inch standard k style gutter shop 5 gutterbrush.

Measure the roof to get the watershed area the area from which water will run off.