Standard Rain Gutter Dimensions

See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.

Standard rain gutter dimensions.

They can be 4 5 or 6 inches. The larger a gutter downspout the more water it can drain quickly. K style sizes will typically range from 5 to 6. 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.

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. This type of down spout is considered the standard downspout style in households and is used with a 5 k style guttering system. Downspouts also come in different sizes such as 2 3 inches and 3 4 inches in size. 7 and greater are appropriate for churches and larger commercial buildings.

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

Gutters come in different sizes when you are completing a gutter replacement the first point to note is that gutters come in different sizes. Then use the chart below to see what size gutter you need. You should have enough gutter downspouts to effectively handle the size of your entire gutter system. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

However too large a gutter downspout can look unattractive. It also comes in sizes 2 3 and 3 4.