Rain Gutter Sizes

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

Rain gutter sizes.

5 inch 5 520 square feet. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Gutter downspout sizes are 3 to 6 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.

7 and greater are appropriate for churches and larger commercial buildings. 6 inch 7 960 square feet. The larger a gutter downspout the more water it can drain quickly. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

K style sizes will typically range from 5 to 6. Aluminum is the most popular material for rain gutters whether seamed or seamless. Aluminum gutters come in three standard thicknesses 025 inch 027 inch and 032 inch. 5 inch standard k style gutter shop 5 gutterbrush.

However too large a gutter downspout can look unattractive. 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.