Roof Pitch Explained

Roof pitch explained a roof s pitch can be thought of as its slope.

Roof pitch explained.

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. The ridge height is 2 9ths to 1 3 the span an angle of 24 to 34. For example if a roof is 8 feet high and spreads out from the center covering 12 feet in each direction the rise over the run would be 8 12. The pitch of your roof is determined by the measurement of the vertical rise by the horizontal run.

Even flat roofs aren t completely flat because they must be constructed at a very slight incline so rain can be directed away from the roof. The rise is the height of the roof from the base to the top. So let s say a roof rises 6 inches for every 12 inches in depth towards the peak. The rafters equal the span.

The rafter length is 3 4 the span about 48. The numerator or first number refers to the vertical height measurement of the roof. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16. The denominator or second number denotes the horizontal length measurement of the roof.

The roof pitching is essentially how steep the roof is going to be they are either going to be flat or pitched. The steeper the roof the more quickly it will be able to shed rain and other debris. Roof pitch is the rise of the roof over the run of the roof.