Suggested Roof Pitch

This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement.

Suggested roof pitch.

One engineer recommends a 12 12 pitch for the new roof while another recommends a 7 12 pitch. The ibhs recommends a 4 to 6 pitch roof. The primary reason roof pitch exists in the first place is to redirect water. The roof pitch would be described as a 6 12 pitch.

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. Roof pitch is simply the slopecreated by the rafter. 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.

Pitches lower than 4 12 have a slight angle and they are defined as low slope roofs. The pitch of your roof also helps determine the type of materials that can be used on your roofing system. Roof pitch is often expressed as a ratio between rise and run in the form of x 12. One of the most important aspects of trying to get the roof right though is the pitch.

Pitches of less than 2 12 are considered flat roofs even though they may be very slightly angled.