How Do You Measure The Slope Of A Roof

Let s say it is equal to 1 5 m.

How do you measure the slope of a roof.

First measure 12 inches from one end of the level and make a mark. Outside of the u s a degree angle is typically used. Roof slope style. To measure the roof pitch you ll need an 18 or 24 inch level a tape measure and a pencil.

After measuring the slope estimate the roof pitch by dividing the slope by 2 if you have a simple gable roof. 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. To find the slope in degrees you divide the rise by the run and find the inverse tangent of the result. Measure from the end of the level up to the bottom edge of the rafter.

Use a level against the underside of the rafter you. However if you have a more complex roof you. For instance a 7 12 roof pitch means that the roof rises 7 inches for every 12 horizontal inches. A low slope roof is anywhere from 2 in 12 to 4 in 12.

There are two main categories of roofing. The run always remains constant at 12 inches. If you do know the roof slope in degrees then all you have to do is find the secant using a scientific calculator. The most precise way to find the roof s slope is by measuring it from the underside.

But you still need to have the rise and the run to find the degree angle if you don t already know it. Roof slope calculator example of use. For example if the. Measure the run length it is the horizontal distance between the roof ridge and the wall of the building.

Measure the rise of your roof. Calculate the rafter length substituting these values into the following formula. Then in the attic place the end of the level against the bottom of a roof rafter and hold it perfectly level. That is the roof s rise.

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. It is often compared to slope but is not exactly the same. Angle the angle of a roof is the same as the roof s slope except instead of being. 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.

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. The easiest way to do this is by accessing a rafter in your attic if you can. Access one of the rafters then take the measurement this way. Measuring the slope from the rafters.

Either way let s see how you can calculate the slope of a roof without using a roof slope calculator. 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.