1/12 roof pitch
4.76° angle
A 1/12 roof rises 1 in for every 12 in of run: a 8.3% slope with a 1.003 area multiplier.
| Pitch | 1 in 12 (1:12) |
|---|---|
| Angle | 4.76° |
| Slope | 8.3% |
| Roof area multiplier | 1.0035 |
| Rafter length per foot of run | 12.04 in |
| Type | A flat or low-slope roof |
Roofing for a 1/12 pitch
Too flat for shingles or standing water will back up under them. Use a membrane roof (EPDM, TPO or modified bitumen). Walkable for most people with care and soft-soled shoes.
Rafter length at 1/12
| Run (half the span) | Rise | Rafter length (before overhang) |
|---|---|---|
| 10 ft | 0.83 ft | 10.03 ft |
| 12 ft | 1 ft | 12.04 ft |
| 14 ft | 1.17 ft | 14.05 ft |
| 16 ft | 1.33 ft | 16.06 ft |
Change the numbers
Other roof pitches
Questions
- What angle is a 1/12 roof pitch?
- 4.76 degrees.
- What is a 1/12 roof pitch as a percentage?
- 8.3%: the roof rises 1 inches for every 12 inches of run.
- What is the roof multiplier for a 1/12 pitch?
- 1.003. Multiply the roof’s flat footprint by 1.003 to get its actual surface area.
- Is a 1/12 roof walkable?
- Walkable for most people with care and soft-soled shoes.