How Do You Measure The Slope Of A Roof

Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.

How do you measure the slope of a roof.

First measure 12 inches from one end of the level and make a mark. Measuring the slope from the rafters. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil. But you still need to have the rise and the run to find the degree angle if you don t already know it.

The easiest way to do this is by accessing a rafter in your attic if you can. Either way let s see how you can calculate the slope of a roof without using a roof slope calculator. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. 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.

Use a level against the underside of the rafter you. Slope the slope of a roof is represented as x 12 where x is the number of inches in rise for every 12 inches of run this is very useful information for many purposes especially for roof framing the slope sometimes called pitch is calibrated on speed squares. In the united states a run of 12 inches 1 foot is used and pitch is measured as the rise of the roof over 12 inches. There are two main categories of roofing.

Let s say it is equal to 1 5 m. Measure the rise of your roof. If you can t get to your attic you can measure slope on your rooftop as long as it s safe to go up there. A low slope roof is anywhere from 2 in 12 to 4 in 12.

Let s assume it is equal to 6 m. If you do know the roof slope in degrees then all you have to do is find the secant using a scientific calculator. Roof slope style. A flat roof has a slope of 2 in 12 or less.

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. However if you have a more complex roof you. The most precise way to find the roof s slope is by measuring it from the underside. After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof.

Measure from the end of the level up to the bottom edge of the rafter. Angle the angle of a roof is the same as the roof s slope except instead of being. For example if the. The run always remains constant at 12 inches.

Roof pitch calculator results explained. It is often compared to slope but is not exactly the same. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. Roof slope calculator example of use.

Outside of the u s a degree angle is typically used. That is the roof s rise.