Standard Roof Gutter Sizes

Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size.

Standard roof gutter sizes.

However too large a gutter downspout can look unattractive. Five inch k style gutters six inch half round. Gutter downspout sizes are 3 to 6 inches. K style sizes will typically range from 5 to 6.

You should have enough gutter downspouts to effectively handle the size of your entire gutter system. Gutter style gutters are typically k style and half round styles though custom profile are available. 7 and greater are appropriate for churches and larger commercial buildings. Gutters come in different sizes.

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. Metal corrosion issues all gutter and components must be the same to prevent electrolysis or electrical. 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. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. 6 inch 7 960 square feet. 5 inch 5 520 square feet.

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. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. 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. Then use the chart below to see what size gutter you need.

The larger a gutter downspout the more water it can drain quickly. 15 m is a practical maximum gutter length to be served by a downspout. 5 inch standard k style gutter shop 5 gutterbrush. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Most downspouts are rectangular but they can also be round or square.