Rain Gutter Sizes

If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Rain gutter sizes.

Half round 5 inch 2 500 square feet 6 inch 3 840 square feet. 6 inch 7 960 square feet. The larger a gutter downspout the more water it can drain quickly. Most downspouts are rectangular but they can also be round or square.

Gutter downspout sizes are 3 to 6 inches. 5 inch 5 520 square feet. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. You should have enough gutter downspouts to effectively handle the size of your entire gutter system.

However too large a gutter downspout can look unattractive. Aluminum gutters come in three standard thicknesses 025 inch 027 inch and 032 inch. 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.

5 inch standard k style gutter shop 5 gutterbrush. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. Aluminum is the most popular material for rain gutters whether seamed or seamless.