9/12 roof pitch
36.87° angle
A 9/12 roof rises 9 in for every 12 in of run: a 75% slope with a 1.25 area multiplier.
| Pitch | 9 in 12 (9:12) |
|---|---|
| Angle | 36.87° |
| Slope | 75% |
| Roof area multiplier | 1.25 |
| Rafter length per foot of run | 15 in |
| Type | A conventional pitch |
Roofing for a 9/12 pitch
Suitable for asphalt shingles, metal, tile and most other roofing with standard underlayment. Steep enough that roofers use roof jacks, toe boards or a harness.
Rafter length at 9/12
| Run (half the span) | Rise | Rafter length (before overhang) |
|---|---|---|
| 10 ft | 7.5 ft | 12.5 ft |
| 12 ft | 9 ft | 15 ft |
| 14 ft | 10.5 ft | 17.5 ft |
| 16 ft | 12 ft | 20 ft |
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Other roof pitches
Questions
- What angle is a 9/12 roof pitch?
- 36.87 degrees.
- What is a 9/12 roof pitch as a percentage?
- 75%: the roof rises 9 inches for every 12 inches of run.
- What is the roof multiplier for a 9/12 pitch?
- 1.25. Multiply the roof’s flat footprint by 1.25 to get its actual surface area.
- Is a 9/12 roof walkable?
- Steep enough that roofers use roof jacks, toe boards or a harness.