How To Measure Gutter Downspout Size

6 inch 7 960 square feet.

How to measure gutter downspout size.

Measure your gutter across the top from the back where the gutter meets the home to the outer edge. Which size of gutter guard by gutterglove do you need. Rainfall intensity is measured in a 5 minute interval translated. Measure the height of.

Run the tape measure from 1 corner of the gutter as far as you can go toward. Then use the chart below to see what size gutter you need. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. How to calculate gutter and downspout capacity step 1.

See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. If your gutter is 5 inches wide or less you ll need our 5 inch kit. Adjusting for pitch and rainfall. 5 inch 5 520 square feet.

Don t use downspouts measuring less than 7 square inches in diameter except for with small areas like a porch or canopy. Measure the length of each gutter run. How do you calculate gutter size. Measure the roof to get the watershed area the area from which water will run off.

Multiply length peak to. Place a sturdy 20 ft 6 1 m ladder on 1 side of your house so that you can reach. Using 2 downspouts doubles the capacity of the gutter to manage water runoff without overflowing. Once you get the peak to eave length multiply it by the width to determine the square footage.

Make sure the downspout size suits the bottom width of the gutter so that a tight fit is achieved. You ll need to measure the roof to determine the watershed area. 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. Find the width of the gutters.

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. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Find the rainfall intensity for your locale. Make sure the downspout diameter is consistent throughout its length.

The steeper a roof s pitch the more windblown rain it can collect. This is the area where the water will run off.