The ibhs recommends a 4 to 6 pitch roof.
Suggested roof pitch.
This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.
The roof pitch would be described as a 6 12 pitch.
It is an essential element to ensure water drains properly off of your roof.
Roof pitch is simply the slopecreated by the rafter.
Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.
The primary reason roof pitch exists in the first place is to redirect water.
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 commonly used roof pitches fall in a range between 4 12 and 9 12.
Roof pitch is often expressed as a ratio between rise and run in the form of x 12.
Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs.
It can be assessed in two ways either as the angle the rafter makes with the horizontal or the proportion between the rise and the run of the roof.
This is for the top level of a 3 story building that is 26 by 64.
One of the most important aspects of trying to get the roof right though is the pitch.