Understanding Slope Measurements
Slope can be expressed in multiple ways for construction projects.
- Pitch Ratio Rise over run (e.g., 4:12).
- Degrees Angle from horizontal.
- Percentage Rise/run × 100.
- Rise per Foot Vertical rise per foot.
Common Roof Pitches
4:12
18.4°
6:12
26.6°
8:12
33.7°
12:12
45.0°
Application Tips
- Roofing Material requirements.
- Drainage Water flow calculations.
- Accessibility Safety considerations.
- Building Codes Minimum requirements.