It is the most common way in us and canada to describe a roof s basic quality slope or steepness.
What does 12 12 roof pitch mean.
The first is from the top of the roof.
Roof pitch is represented in inches rise of 12 inches run.
12 12 roof pitch equivalents roof rises 12 in a length of 12.
12 12 roof pitch angle 45 00 degrees.
The second number is the horizontal area measured usually measured as a standard 12 inches one foot of roof.
The resulting angle would be 45 degrees.
An example of a roof pitch would be a 6 12 pitch which means that the roof rises 6 for every 12 inward towards the peak or ridge.
12 12 pitch means 12 inches out then 12 inches up.
The higher the first number rise in the ratio the steeper the roof.
Here is a site that may help.
12 12 roof pitch 45 degrees 12 12 roof pitch to angle 45 00 degrees also referred to as 12 12 roof slope 12 on 12 12 to 12 and 12 12 roof angle.
To figure the pitch of a roof you.
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.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
Roof pitch is a term you may often hear from a roofer an architect or a framing contractor builder.