How Measure Gutter Size

Calculating the drainage area of a roof.

How measure gutter size.

Then use the chart below to see what size gutter you need. Move the tape measure so its blade is sitting plumb against the end of the level. Place a sturdy 20 ft 6 1 m ladder on 1. Multiply drainage area by 1 3.

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. Place a sturdy 20 ft 6 1 m ladder against the roof and climb. If a roof s various drainage areas call for different size gutters go for the biggest one k style. See photos below most residential gutters will measure approximately 5 inches across the top with the actual opening being approximately 4 5 inches.

You can also work with a professional who knows the climate in your area and who understands what size of gutter you need to work with the roof that you have. Gutter size is determined by measuring across the top of the gutter to help you understand gutter measurement and dimensions here is a relative comparison in size between 2 3 inch downspouts vs. 5 10 pack kit 40. K style sizes will typically range from 5 to 6.

Which size of gutter guard by gutterglove do you need. 7 and greater are appropriate for churches and larger commercial buildings. How to measure gutters method 1 of 3. The steeper a roof s pitch the more windblown rain it can collect.

Hold an extended tape measure at the end of the level that is not touching the surface of the roof. Download our free gutter guide for more helpful information. If your gutter is 5 inches wide or less you ll need our 5 inch kit. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Use your tape measure to determine the length of the twine marking down this calculation. How do you calculate gutter size. Find the width of the gutters. Measure your gutter across the top from the back where the gutter meets the home to the outer edge.

Adjusting for pitch and rainfall. 5 inch 5 520 square feet. 12 inches or more. 5 inch standard k style gutter shop 5 gutterbrush.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted. 3 4 inch downspouts likewise a comparison between 3 inch round downspout and 4 inch round downspout.