Offset Roof Pitch

Citation needed carpenters frame rafters on an angle to pitch a roof.

Offset roof pitch.

The most common parameter is to maintain an equal ridge height over building sections with differing spans. This measurement is best done on a bare roof because curled up roofing shingles will impair your measurement. There are some standing seam metal roofing options available from atas and other manufacturers that can be installed on a roof with pitch of 1 12. Buffalo new york and montreal quebec canada specify 6 in 12 a pitch of approximately 26 6 degrees.

Although uncommon there are situations where architectural parameters require off angle hip and valley roof construction. So you would need to pick the right option as most regular standing seam metal roofs will require a roof pitch of 2 12 or even 3 12 at a minimum. 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. That is to say the roof pitch expressed as a ratio tells you how many inches the roof rises for every 12 inches of depth.

To maintain a consistant ridge height in these situations the roof pitch must be adjusted. Gable and other multi pitched roofs allow for lower primary structures with a corresponding reduction in framing and sheathing materials. Angle the angle of a roof is the same as the roof s slope except instead of being. The pitch of your roof is determined by the measurement of the vertical rise by the horizontal run.

So let s say a roof rises 6 inches for every 12 inches in depth towards the peak.