How To Measure Rain Gutter Size

Carefully climb up the ladder and measure the width of the opening at the top of the gutters.

How to measure rain gutter size.

See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Measure length of twine mark the measurement with a piece of tape and then pull the twine off of the other end of the gutter. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Use your tape measure to determine the length of the twine marking down this calculation.

Find the width of the gutters. Typically gutters range in size from 10 to 15 cm 4 inches to 6 inches. Measure the diameter of the gutter. Rain gutters can vary in size.

Measure your gutter across the top from the back where the gutter meets the home to the outer edge. How to measure downspouts. Downspout sizes must not exceed the bottom width of the gutter. Adjusting for pitch and rainfall.

Multiply length peak to eave by width to determine. 5 inch standard k style gutter shop 5 gutterbrush. Then use the chart below to see what size gutter you need. Measure the roof to get the watershed area the area from which water will run off.

The steeper a roof s pitch the more windblown rain it can collect. Rainfall intensity is measured in a 5 minute. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. A steep pitched.

How to calculate gutter and downspout capacity. Gutters typically come in 5 or 6 in 13 or 15 cm sizes and can be k style or half round place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach the gutters. Find the rainfall intensity for your locale. The capacity of a sloped rectangular gutter may be approximated by using a gutter cross section area not less than that of a semicircular gutter and a depth to width ratio of at least 0 75.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Roof slope rainwater must not overrun the front edge of the gutter. 6 inch 7 960 square feet. How do you calculate gutter size.