17/12 roof pitch
54.78° angle
A 17/12 roof rises 17 in for every 12 in of run: a 141.7% slope with a 1.734 area multiplier.
| Pitch | 17 in 12 (17:12) |
|---|---|
| Angle | 54.78° |
| Slope | 141.7% |
| Roof area multiplier | 1.7341 |
| Rafter length per foot of run | 20.81 in |
| Type | A very steep roof |
Roofing for a 17/12 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 17/12
| Run (half the span) | Rise | Rafter length (before overhang) |
|---|---|---|
| 10 ft | 14.17 ft | 17.34 ft |
| 12 ft | 17 ft | 20.81 ft |
| 14 ft | 19.83 ft | 24.28 ft |
| 16 ft | 22.67 ft | 27.74 ft |
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Other roof pitches
Questions
- What angle is a 17/12 roof pitch?
- 54.78 degrees.
- What is a 17/12 roof pitch as a percentage?
- 141.7%: the roof rises 17 inches for every 12 inches of run.
- What is the roof multiplier for a 17/12 pitch?
- 1.734. Multiply the roof’s flat footprint by 1.734 to get its actual surface area.
- Is a 17/12 roof walkable?
- Not walkable: roofers work from roof jacks and fall protection, which adds labor cost.