Metal Roof Gutter Size

This wizard makes it easy to calculate the roof design area by providing various shape calculations and the calculation for vertical walls area per international plumbing code ipc.

Metal roof gutter size.

For a 5 inch k style gutter the square footage should be up to 5 500 sq ft and for a 6 inch k style gutter the square footage should be upto 7 900 sq ft. 6 inch 7 960 square feet. 6 inch 7 960 square feet. 5 inch 5 520 square feet.

They can be 4 5 or 6 inches. Smacna s new downspout and gutter sizing calculator enables the user to manually enter the design area of the roof or use the design area wizard for the calculation. Then use the chart below to see what size gutter you need. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.

Ratio of depth to width of gutter select gutter ratio 0 125x 0 25x 0 375x 0 5x 0 625x 0 75x 0 875x 1x 1 125x 1 25x 1 375x 1 5x 1 625x 1 75x 1 875x 2x calculate drainage reset. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. Gutters come in different sizes. If a roof s various drainage areas call for different size gutters go for the biggest one k style.

After you have calculated the square footage use following calculations. 5 inch 5 520 square feet. For half rounds 5 inch should be used for up to 2500 sq feet and 6 inch for up to 3 840 sq ft.