10/12 roof pitch
39.81° angle
A 10/12 roof rises 10 in for every 12 in of run: a 83.3% slope with a 1.302 area multiplier.
| Pitch | 10 in 12 (10:12) |
|---|---|
| Angle | 39.81° |
| Slope | 83.3% |
| Roof area multiplier | 1.3017 |
| Rafter length per foot of run | 15.62 in |
| Type | A steep roof |
Roofing for a 10/12 pitch
Suitable for asphalt shingles, metal, tile and most other roofing with standard underlayment. Not walkable: roofers work from roof jacks and fall protection, which adds labor cost.
Rafter length at 10/12
| Run (half the span) | Rise | Rafter length (before overhang) |
|---|---|---|
| 10 ft | 8.33 ft | 13.02 ft |
| 12 ft | 10 ft | 15.62 ft |
| 14 ft | 11.67 ft | 18.22 ft |
| 16 ft | 13.33 ft | 20.83 ft |
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Other roof pitches
Questions
- What angle is a 10/12 roof pitch?
- 39.81 degrees.
- What is a 10/12 roof pitch as a percentage?
- 83.3%: the roof rises 10 inches for every 12 inches of run.
- What is the roof multiplier for a 10/12 pitch?
- 1.302. Multiply the roof’s flat footprint by 1.302 to get its actual surface area.
- Is a 10/12 roof walkable?
- Not walkable: roofers work from roof jacks and fall protection, which adds labor cost.