Rain Gutter Downspout Sizes

Downspouts should be constructed with conductor.

Rain gutter downspout sizes.

Round 3 inches 706 square feet 4 inches 1 255 square feet. You should have enough gutter downspouts to effectively handle the size of your entire gutter system. The second most common style of downspouts in urban homes is the rectangular downspout coming under a range of sizes. As far as downspouts go they run at 2 x3 and 3 x4 in size or 3 or 4 inches in diameter.

For example a 6 inch k style gutter requires a 3 x 4 downspout while a 5 inch k style gutter uses a 2 x 3 downspout. Most downspouts are rectangular but they can also be round or square. Gutter professionals have experience matching the gutters and the downspouts. The sizes available in this style are 3 4 5 and 6.

Downspouts of less than 7 00 sq in 4515 sq mm cross section should not be used except for small areas such as porches and canopies. Gutter downspout sizes are 3 to 6 inches. The larger a gutter downspout the more water it can drain quickly. It also comes in sizes 2 3 and 3 4.

Round downspouts come in various sizes and colors and mostly used with half round gutters. The size of the downspout should be constant through out its length.