Roof pitch refers to the measurement of the slope of a roof and you express this as a ratio.
Roof slope degrees to pitch.
Two most common methods 4 12 or 4 12 are used for marking the pitch of a roof.
The slope of a roof or pitch is determined by how many inches the roof rises over 1 foot or 12 inches.
Divide its rise by run in.
Locate its tangent or tan and follow the left row for you to read its corresponding degree.
On blue prints architects engineers usually display the pitch of a roof in the format shown on the image where number 4 represents a rise and number 12 represents a length.
It s just a little math.
To put it in perspective the angle of this slope would be around 30 degrees.
Degrees to roof pitch rise in run to see a table.
Also see our page quick reference.
The following table shows how the same common roof slopes can be expressed using rise in run ratios degrees and percentages.
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 minimum roof pitch for shedding snow is around 30 or a 6 12 or 7 12 slope although this is not a definite as the material of your roof the direction of the snow and wind are some factors that can affect whether or not snow will slide as roofs of as little as 10 have been reported to shed snow.
The table below shows common roof pitches and the equivalent grade degrees and radians for each.
The following table shows the roof pitch rise in run equivalents for all roof slopes in degrees from 1 to 72.
A pitch over 9 12 is considered a steep slope roof between 2 12 and 4 12 is considered a low slope roof and less than 2 12 is considered a flat roof.
Pitch tan angle use this when you express the angle of the roof pitch in degrees what is the standard pitch of a roof.
Most roof s have a pitch in the 4 12 to 9 12 range.
To see what the degree equivalents are for standard rise in run roof pitches see our page quick reference.
An example for a steep sloped roof is 8 12.
Determine its angle through taking a 12 inch level and.
The rise will be equal to the amount of the incline within the given distance or the run that.
See below after the table for directions on how to convert any roof slope from one form to another even roof slopes not shown in the table.
This means that the rise of the slope goes up or down 8 inches for every 12 inches.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
Select inches to enter decimal inches or millimeters for metric.
The combination of two numbers are used to display or show the roof pitch.
Roof pitch is a term describing how steep or flat your roof slope is.
Roof slope expressed as rise.
Directly measure roof pitch angle and calculate pitch and angle on phone or tablet.
