Flat Roof Gutter Size Calculator

The area that your chosen guttering system can cope with.

Flat roof gutter size calculator. Northclad gutter size requirement calculator this calculator uses current data to calculate the required size of gutter as well as number and size of downspouts based on your input. 5 inch 5 520 square feet. 6 inch 7 960 square feet. And reduction in down pipe size by using a funnel section.

If a roof s various drainage areas call for different size gutters go for the biggest one k style. We recommend using this calculator as a basic tool to begin determining the requirements for your drainage system however all information should be verified by. Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage. The total rainfall and how rapidly it falls will affect the runoff from the roof.

Gather some basic weather information to calculate the proper size for gutters and downspouts for a house. Downpipe and eaves gutter calculator valley gutters generic rain water outlets for flat roofs. As most roofs are not flat this needs to be calculated we ll show you a simple way. Then use the chart below to see what size gutter you need.

There are two things you need to know. Simplified app for android phones. Requires flow to be calculated in one of the other calculators. The simple way to calculate gutter sizes.

The effective roof area that will collect the rain which will need to be removed by the guttering. Then use the information below to see what size gutter you need. An inch of rain is not much but it if falls in half an hour it could flood a gutter. 5 inch 5 520 square feet.

Multiply the drainage area by the roof pitch factor and rainfall intensity to find out the adjusted square footage.