Downspout Gutter Sizes

Round downspouts are typically used with half round gutters.

Downspout gutter sizes.

Five inch k style gutters or 6 inch half rounds the most common residential sizes are able to handle the rainfall on most houses in most parts of the country. 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. You should have enough gutter downspouts to effectively handle the size of your entire gutter system. They come in various colors and sizes of 3 4 5 and 6.

But houses with big steep roofs or those located in climates prone to heavy downpours may need wider gutters and extra downspouts to keep rainwater from overflowing. Available sizes are 2 3 and 3 4. In general there are three different types of downspouts. By reducing the downspout spacing to perhaps 35lf you could use a 6 gutter with 9 4 x6 downspouts in lieu of an 8 system.

This is the standard downspout style used on homes with the 5 k style gutter system. It also comes in sizes 2 3 and 3 4. The larger a gutter downspout the more water it can drain quickly. This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system.

Most downspouts are rectangular but they can also be round or square. However too large a gutter downspout can look unattractive.