How To Measure Gutter Downspout Size

Adjusting for pitch and rainfall.

How to measure gutter downspout size.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. If a roof s various drainage areas call for different size gutters go for the biggest one k style. This is the area where the water will run off. If your gutter is 5 inches wide or less you ll need our 5 inch kit.

Using 2 downspouts doubles the capacity of the gutter to manage water runoff without overflowing. Measuring existing gutters 1. Rainfall intensity is measured in a 5 minute interval translated. Measure your gutter across the top from the back where the gutter meets the home to the outer edge.

How to calculate gutter and downspout capacity step 1. 5 10 pack kit 40. Which size of gutter guard by gutterglove do you need. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.

Now that we are well aware of the various gutter downspout sizes and styles let us dig deeper into the materials used for effective downspouts and how much they shall cost. 5 inch 5 520 square feet. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Find the rainfall intensity for your locale.

Measure the roof to get the watershed area the area from which water will run off. 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. Then use the chart below to see what size gutter you need. Measure the length of each gutter run.

You ll need to measure the roof to determine the watershed area. Measure the height of. Once you get the peak to eave length multiply it by the width to determine the square footage. Multiply length peak to.

How do you calculate gutter size. 6 inch 7 960 square feet. Don t use downspouts measuring less than 7 square inches in diameter except for with small areas like a porch or canopy. Make sure the downspout size suits the bottom width of the gutter so that a tight fit is achieved.

The steeper a roof s pitch the more windblown rain it can collect. Run the tape measure from 1 corner of the gutter as far as you can go toward.