Roof Pitch Explained

The rafter length is 3 4 the span about 48.

Roof pitch explained. Roof pitch is the rise of the roof over the run of the roof. Roof pitch explained a roof s pitch can be thought of as its slope. The rafters equal the span. The denominator or second number denotes the horizontal length measurement of the roof.

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. Roof pitch defined and explained numerator. The steeper the roof the more quickly it will be able to shed rain and other debris. The ridge height is 1 9 to 1 7th the span an angle of 12 5 to 16.

Commonly used roof pitches were given names such as greek. The numerator or first number refers to the vertical height measurement of the roof. The ridge height is 2 9ths to 1 3 the span an angle of 24 to 34. 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.

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. So let s say a roof rises 6 inches for every 12 inches in depth towards the peak. The roof pitching is essentially how steep the roof is going to be they are either going to be flat or pitched.