The first is from the top of the roof.
What does 12 12 roof pitch mean.
Roof pitch is a term you may often hear from a roofer an architect or a framing contractor builder.
12 12 pitch means 12 inches out then 12 inches up.
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.
In the united states roof pitch is typically measured in inches and expressed as a ratio.
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 resulting angle would be 45 degrees.
12 12 roof pitch angle 45 00 degrees.
There are two suggested ways to measure a roof pitch.
12 12 roof pitch equivalents roof rises 12 in a length of 12.
The higher the first number rise in the ratio the steeper the roof.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
Roof pitch is represented in inches rise of 12 inches run.
Roof pitch or slope tells you how many inches the roof rises for every 12 inches in depth.
Here is a site that may help.