Rain Gutter Sizes

Half round 5 inch 2 500 square feet 6 inch 3 840 square feet.

Rain gutter sizes.

See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches. Aluminum is the most popular material for rain gutters whether seamed or seamless. Measure your gutter across the top from the back where the gutter meets the home to the outer edge. 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.

6 inch 7 960 square feet. 7 and greater are appropriate for churches and larger commercial buildings. Gutter downspout sizes are 3 to 6 inches. 5 inch 5 520 square feet.

However too large a gutter downspout can look unattractive. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Then use the chart below to see what size gutter you need. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

Most downspouts are rectangular but they can also be round or square. 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.