Gutter And Downspout Dimensions

As with gutters a downspout s capacity must match or exceed the expected runoff.

Gutter and downspout dimensions.

You should be able to. Round downspouts come in various sizes and colors and mostly used with half round gutters. How to figure the right downspout size. The most common gutter sizes are 5 inches and 6 inches although 4 inches is available as well.

Rectangular 2 by 3 inches 600 square feet 3 by 4 inches 1 200 square feet. This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. Use this downspout extension to divert water away from the foundation or connect to drainage pipe and catch basin to control drainage.

Practically speaking though a common gutter size is usually selected and downspout spacing is equal for most buildings. The larger a gutter downspout the more water it can drain quickly. Gutter downspout sizes are 3 to 6 inches. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.

But more could be. 5 inch standard k style gutter shop 5 gutterbrush. Size of the gutter drainage area. You should have enough gutter downspouts to effectively handle the size of your entire gutter system.

One downspout is typically enough for every 20 25 feet of guttering. However too large a gutter downspout can look unattractive. Offset of more than 10 ft 3 0 m can affect drainage capacity. For design purposes and aesthetics let s assume you have selected an 8 gutter.

Continuing with our example in the last step we know our gutter downspout system may be subject to as much as 1 880 gallons per minute. The gutter outlet capacity should suit the downspout capacity. The downspout size must suit. Most downspouts are rectangular but they can also be round or square.

The size of the downspout should be constant through out its length. Downspouts are commonly 2 x 3 inches and 3 x 4 inches in size or 3 or 4 inches in diameter. Round 3 inches 706 square feet 4 inches 1 255 square feet. Rainfall intensity is measured in inches per hour at a 5 minute interval.

The sizes available in this style are 3 4 5 and 6. Use the chart below to figure out how many extra downspouts you need.