Gutter Downspout Sizes

The larger a gutter downspout the more water it can drain quickly.

Gutter downspout sizes.

Downspout sizing in sizing downspouts the following considerations apply. It is possible to use a mix of gutter sizes a mix of downspout sizes and quantities to accommodate the theoretical gallons per minute draining. 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. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

5 inches and 6 inches gutters are the most common sizes installed for. The size of the downspout should be constant through out its length. 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. Then use the information below to see what size gutter you need.

However too large a gutter downspout can look unattractive. Gutters are typically round shape or k style but other designs are available. They are made from aluminum vinyl zinc copper or steel. Water capacity values of a gutter downspout system is calculated using the height head of water a gutter can hold the outlet orifice size of the downspout and the quantity of downspouts used.

Gutters and gutter downspout sizes. Gutter downspout sizes are 3 to 6 inches. If a roof s various drainage areas call for different size gutters go for the biggest one k style. 5 inch 5 520 square feet.

Most downspouts are rectangular but they can also be round or square. You should have enough gutter downspouts to effectively handle the size of your entire gutter system.