Gutter Downspout Sizes

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.

Gutter downspout sizes.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. 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. Gutters are typically round shape or k style but other designs are available.

5 inches and 6 inches gutters are the most common sizes installed for. Then use the information below to see what size gutter you need. 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. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

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. Most downspouts are rectangular but they can also be round or square. 5 inch 5 520 square feet. Downspouts should be constructed with conductor.

They are made from aluminum vinyl zinc copper or steel. The size of the downspout should be constant through out its length. The larger a gutter downspout the more water it can drain quickly. Gutters and gutter downspout sizes.

Continue reading to learn more about what to consider when figuring the right gutter downspout sizes. Gutter downspout sizes are 3 to 6 inches.