Roof Sqaure Footage Per Area Drain And Dwonspout

Two hundred feet of gutter can cost anywhere between 660 and 4 500.

Roof sqaure footage per area drain and dwonspout.

Adapted from smith 2014 cited below. Max area of roof draining to one down. According to the chart for 1 8 slope per 12 of pipe for 5 000 square feet of roof area with a 6 per hour of rainfall the required pipe size is 8. Gutters come in a wide range of materials the cost depends on which you choose.

6 inch 3 840 square feet. Determine leader or pipe size. Plumbing codes typically use the vertically projected roof area for drainage design and they often use a square foot allowance per square inch of downspout for 1 in hr 25 mm hr rainfall that varies with diameter for example 3 in 76 mm. 5 inch 2 500 square feet.

A square inch of downspout can drain 1 200 square feet of roof during a rain with an intensity of one inch per hour. Maximum horizontal projected roof area that can be drained in square feet. Metal gutters vary in price from 6 to 12 for aluminum and 9 to 20 for steel to 25 or more for high end copper. How many downspout installations should your gutters have.

There are 5 easy steps to figure out how many drains your commercial roofing project will need. Vinyl gutters cost 2 to 5 per linear foot. 5 inch 5 520 square feet. To do that simply multiply drainage area calculated earlier by roof pitch factor and rainfall intensity.

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. Calculate total roof area. For most homes this means installing spouts at either end of a gutter section. If we have to sum it up in a single rule gutters need a downspout around every 30 to 40 feet.

To size the vertical roof drain for the same parameters 5 000 square feet of room area and 6 per hour of rain consult table 1106 2 figure 3. Roof area the locale s rainfall intensity and gutter capacity determine how many square inches of downspout are needed. If a roof s various drainage areas call for different size gutters go for the biggest one k style. Roof drainage capacity for other roof drain pipe or leader diameters.

We have rounded smith s data and comment further below. 6 inch 7 960 square feet. Doubling the number of downspouts halves the required capacity for each.