11/12 roof pitch
42.51° angle
A 11/12 roof rises 11 in for every 12 in of run: a 91.7% slope with a 1.357 area multiplier.
| Pitch | 11 in 12 (11:12) |
|---|---|
| Angle | 42.51° |
| Slope | 91.7% |
| Roof area multiplier | 1.3566 |
| Rafter length per foot of run | 16.28 in |
| Type | A steep roof |
Roofing for a 11/12 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 11/12
| Run (half the span) | Rise | Rafter length (before overhang) |
|---|---|---|
| 10 ft | 9.17 ft | 13.57 ft |
| 12 ft | 11 ft | 16.28 ft |
| 14 ft | 12.83 ft | 18.99 ft |
| 16 ft | 14.67 ft | 21.71 ft |
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Other roof pitches
Questions
- What angle is a 11/12 roof pitch?
- 42.51 degrees.
- What is a 11/12 roof pitch as a percentage?
- 91.7%: the roof rises 11 inches for every 12 inches of run.
- What is the roof multiplier for a 11/12 pitch?
- 1.357. Multiply the roof’s flat footprint by 1.357 to get its actual surface area.
- Is a 11/12 roof walkable?
- Not walkable: roofers work from roof jacks and fall protection, which adds labor cost.