How To You Find The Slope Of A Roof

First enter the value of the rise and choose the unit of measurement from the drop down menu.

How to you find the slope of a roof.

Rise run rise run slope. For example if you find 4 inches of height with the tape measure at the 12 inch mark on the level your slope is 4 12 or 4 in 12. Roof pitch is often expressed as a ratio between rise and run in the form of x 12. Here are the steps to follow for the roof angle calculator.

Roof slopes are measured in units of twelves. Go search your app store for roof pitch apps. These can be acceptably accurate sometimes. Finally enter the value of the rafter length and.

The slope of your roof is the ratio of vertical distance rise to horizontal distance run. Just write down the measurements you found. To find the angle of a roof in degrees convert the pitch to a slope then convert to degrees by finding the arc tangent of the slope. It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof.

The rafters that will provide you with the best measurements are the rafter in the attic the overhang rafter at the end of the roof and the barge rafter which is located to the side of the gable. You don t have to get up on the roof or go to the attic to use these. There are also a number of smartphone apps that you can use to find the slope of your roof if you have a clear view of a gable end on the building. Roof pitch is simply the slopecreated by the rafter.

For example when a roof has a slope of 5 12 the roof is 5 inches high for every 12 inches long. Another way of stating this is that the roof has a rise of 5 and a run of 12. First convert the pitch to a slope. Measuring the underside of the roof is actually the most accurate way of calculating the slope of the roof as there are no materials which will create an uneven surface.

To do this simply convert the rise and run as a fraction to a decimal form eg. Then enter the value of the run and choose the unit of measurement from the drop down menu. You can measure with twelve feet or twelve yards but in this article we will use twelve inches. The slope of a roof.