Standard Roof Gutter Sizes

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Standard roof gutter sizes.

The capacity of a sloped rectangular gutter may be approximated by using a gutter cross section area not less than that of a semicircular gutter and a depth to width ratio of at least 0 75. The larger a gutter downspout the more water it can drain quickly. Gutter style gutters are typically k style and half round styles though custom profile are available. K style sizes will typically range from 5 to 6.

See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. As a general rule egutter recommends for roof areas that exceed 2800 square feet a 6 k style size with a 3 x 4 downspout size would be appropriate. They can be 4 5 or 6 inches. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.

There are two main common sizes of gutters and one of them is 5 inch. 5 inch standard k style gutter shop 5 gutterbrush. Then use the chart below to see what size gutter you need. 5 inch 5 520 square feet.

For most homes this will be a large enough gutter to handle the amount of water washing off of the roof but if you live in a particularly rainy area you will want to opt for wider downspouts to be installed with your new gutters. However too large a gutter downspout can look unattractive. 7 and greater are appropriate for churches and larger commercial buildings. 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. Metal corrosion issues all gutter and components must be the same to prevent electrolysis or electrical. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Gutter downspout sizes are 3 to 6 inches.

Five inch k style gutters six inch half round. This is most common in the k style gutters. There are two most common type of residential gutters that we will talk about in this post for reliable roof gutter sizing. Half round 5 inch 2 500 square feet 6 inch 3 840 square feet.

15 m is a practical maximum gutter length to be served by a downspout. 6 inch 7 960 square feet.