Roof Angle Tables

Roof pitch angle and slope factor charts.

Roof angle tables.

Although there s isn t any standard pitch of a roof used on all kinds of sloped roofs you can determine the range of pitches by using a roof angle calculator and by considering factors like the local climate and roofing materials. Usually they come in the form of a roof pitch diagram chart but other times it will be presented to you in a conversion format. The following table provides the roof pitch multiplier for roofs of various slopes. For a more detailed explanation of the roof pitch multiplier see how to find the area of a sloped roof if you know the roof pitch in degrees find the secant of the slope using a scientific calculator for example if the roof pitch is 45 then sec 45 1 414213.

The a frame style roof shown just above located on highway 61 just south of hovland minnesota is built at a 75 angle and is considered a very steep roof. Angle the angle of a roof is the same as the roof s slope except instead of being. Find the inverse tangent of the pitch to find the angle in degrees. To convert between american roofing ratios and pitch degrees follow these steps.

What degree angle is a 12 12 pitch roof. Calculate the length of a rafter from the roof slope ratio of inches per foot and a building width measurement. 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. Roof pitch is used to describe the slope or angle of the roof.

In essence a roof pitch chart is provided as a rough guide usually by a roofing company to help you see what the average roof pitches tend to be. Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof. The roof pitch is important in determining the appropriate installation method and how much roofing material will be needed. Roof pitch or slope is a measure of vertical rise to horizontal run expressed in inches per foot.

Divide the first part of the ratio by 12 to work out the pitch. The combination of two numbers are used to display or show the roof pitch. The table below describes different roof slopes giving roor slope in rise run in inches and re expressing the same slopes as angle grade walk ability and roof type or class. Includes result for hip valley factor slope factor and the roof slope in degrees.

A 12 12 pitch roof has a pitch angle of 45. Enter any pitch or fraction of pitch to find angle. Roof pitch is a term describing how steep or flat your roof slope is. Roof pitch calculator results explained.

If you add an eaves overhang dimension then the amount the rafter sticks passed the wall will be added to the rafter length. Roof pitch degree table.