Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
Standard size of roof gutter.
The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website.
Picking your gutter size.
You can measure pitch with a 2 foot level and a tape measure.
The steeper a roof s pitch the more windblown rain it can collect.
Residential sizing samples are available to check the optimal fit but in most cases the 5 half round gutter requires standard gutterbrush for 5 gutters 4 25 dia while the 6 half round gutter requires oversized gutterbrush for 6 gutters 5 25 dia.
A larger sized gutter and downspout will work better in locations that experience heavy or prolonged rainy seasons.
6 inch 7 960 square feet.
If frequent heavy showers occur where you live then a down spout with a bigger size would prove more suitable.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
Metal corrosion issues all gutter and components must be the same to prevent electrolysis or electrical corrosion.
Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.
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.
If a roof s various drainage areas call for different size gutters go for the biggest one k style.
6 inch 7 960 square feet.
Hold one end of the level against the roof level it and then measure the distance between the roof and the underside of the level at its midpoint which.
Together they can remove water from the gutter faster thus improving the efficiency of your gutter system.
5 inch 5 520 square feet.
5 inch 5 520 square feet.
Now finally you can find the appropriate gutter size by looking at the following figures showing the relationship between different gutter systems and the roof area they ll be able to drain.
5 inch 5 520 square feet.
The slope of the roof and size of the gutter affect the gutter drainage capacity.
6 inch 7 960 square feet.
5 inch 2 500 square feet.
Roof pitch is very important for right roof gutter sizing.
Then use the chart below to see what size gutter you need.
Roof pitch matters when you re considering the size of your future gutters.
Is a gutter just a gutter.
That is to say.
Once you are done deciding the correct size for your downspout depending upon the size of your gutter and the amount of rainfall in your area the next step shall be figuring out the kind of downspouts you want installed gpm stands for gallons per minute.
