How To Find The Slope Of A Roof

Once you know the roof slope multiplier for a particular slope you can use it to find the actual area of any size sloped roof with the same slope.

How to find the slope of a roof.

If this isn t practical then perform the same measurement on the underside of. Angle the angle of a roof is the same as the roof s slope except instead of being. Locate the level s 12 inch mark. Calculate the roof slope.

If it doesn t have this mark use a tape measure to locate. Use a level against the underside of the rafter you re measuring to get the most accurate value. How to convert roof pitch to degrees. The picture below shows the pitch of a 7 12 roof slope meaning that for 12 of horizontal measurement roof run the vertical measurement roof rise is 7.

The most precise way to find the roof s slope is by measuring it from the underside. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. 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. Write the roof slope as the ratio of rise over run or vertical distance over horizontal distance.

This forms an angle of 18 5 between the horizontal section and the roof and creates a gentle incline that is seen as a midpoint between a low pitch and medium pitch roof. Roof pitch calculator results explained. Access one of the rafters then take the measurement this way. A 4 12 is a roof slope that rises by 4 inches for every 12 inches across.

For example if your tape measure found a 6 inch vertical distance to the 12 inch mark on your level the slope is 6 12 or 6 in 12. When you want to replace or repair your roof you need to know about the slop of the roof the reason for this is the simple fact that roof slope can affect the overall cost of replacing or repairing the roof. 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. There are a number of ways that you can calculate the roof slope of your home and you need to be aware of this.

First convert the pitch to a slope.