How To Measure Gutter Downspout Size

If a roof s various drainage areas call for different size gutters go for the biggest one k style.

How to measure gutter downspout size.

Multiply length peak to. Don t use downspouts measuring less than 7 square inches in diameter except for with small areas like a porch or canopy. Then use the chart below to see what size gutter you need. Run the tape measure from 1 corner of the gutter as far as you can go toward.

The second most common style of downspouts in urban homes is the rectangular downspout coming under a range of sizes such as 2 3 3 4 and 4 5. 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. Measure the length of each gutter run.

5 inch 5 520 square feet. Using 2 downspouts doubles the capacity of the gutter to manage water runoff without overflowing. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Which size of gutter guard by gutterglove do you need.

Rainfall intensity is measured in a 5 minute interval translated. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. This is the area where the water will run off. 5 10 pack kit 40.

Find the width of the gutters. How do you calculate gutter size. Place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach. Make sure the downspout size suits the bottom width of the gutter so that a tight fit is achieved.

Make sure the downspout diameter is consistent throughout its length. If your gutter is 5 inches wide or less you ll need our 5 inch kit. Once you get the peak to eave length multiply it by the width to determine the square footage. Measure the height of.

Adjusting for pitch and rainfall. 6 inch 7 960 square feet. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. How to calculate gutter and downspout capacity step 1.

Measure your gutter across the top from the back where the gutter meets the home to the outer edge. Find the rainfall intensity for your locale.