DENKA's Life Science & Environmental Products drives improvement of dwelling environment, healthy and affluent life, through the businesses of a wide range of plastic products and pharmaceutical products.

Calculations of rain gutter drainage capacity

The drainage capacity of a rain gutter is determined by the following factors: the projected area of the roof; rain intensity/slope of eave trough; and size of eave trough and vertical downspout. Enter the required information below and click Calculate to calculate the drainage capacity of your rain gutters.

Configure Calculation

1. Calculate the projected roof area

m
m
m2

2. Configure the rain intensity and slope of eave trough.

mm/h
/1000

Note: Rain intensity of 100 mm/h or more is extremely rare (about once in five to six years).

3. Determine the type of eave trough and vertical downspout.

Notes:
* Only pipe VP and VU pipe meeting JIS standard.
* We do not manufacture pipe VP or VU pipe.

Calculate

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