A 9/12 roof pitch — described as “9 over 12” — is a steep residential roof angle that offers standout visual appeal and top-notch weather performance. “9 over 12” means the roof rises 9 inches for every 12 inches of horizontal run. This results in an angle of about 36.87 degrees, giving homes a bold, commanding roofline.
What Does a 9-12 Roof Pitch Represent?
With a 9/12 pitch, the roof increases 9 inches in height for every foot of horizontal span. This equals an angle of approximately 36.87 degrees and a slope of 75%. It’s a steep pitch designed for quick water and snow runoff, perfect for challenging climates.
- Pitch: 9/12 (or “9 over 12”)
- Angle in Degrees: 36.87°
- Slope Percentage: 75%
- Rafter Length (per 12 inches of run): Approximately 15 inches
Need to calculate your roof pitch? Try our roof pitch and angle calculator for instant results.
Is a 9-12 Roof Pitch a Good Choice?
Yes — a 9/12 pitch is an excellent option for homeowners in areas with heavy rain or snow. It provides fast drainage, reduces maintenance, and adds serious curb appeal. Here’s why it’s a solid pick:
- Fast water and snow runoff for tough weather
- Pairs well with shingles, metal, or slate roofing
- Bold roofline for standout architectural impact
- Increased attic space and ventilation potential
Installation & Cost Insights
Due to its steepness, a 9/12 roof pitch requires extra labor and safety measures during installation. While labor costs may be higher, the long-term benefits of reduced maintenance and strong weather resistance make it a smart investment.
How Does a 9/12 Pitch Compare in Degrees to Other Roof Slopes?
At around 36.87 degrees, a 9/12 pitch is noticeably steeper than popular moderate slopes like 5/12 or 6/12. It’s approaching the extreme pitches like 12/12 but still manageable for experienced roofing crews.
What is the Angle in Degrees for a 9-12 Roof Pitch?
The angle for a 9/12 roof pitch is approximately 36.87 degrees. For a full list of roof pitches and corresponding angles, explore our roof slope chart.
Knowing your roof’s angle helps with material choices, planning, and proper installation. A 9/12 pitch delivers strong performance and eye-catching design.
Where Do You See 9/12 Roof Pitches?
The 9/12 pitch is favored for homes in snowy or rainy regions and for homeowners looking for dramatic style. You’ll often see this pitch in:
- Chalets and alpine homes — Built for snow loads, often with steep gable roofs
- Custom residential homes — For a bold, upscale appearance
- Detached garages and sheds — Matches main house roof pitch for consistency
- Covered porches and additions — Complements steeper home designs
- Heavy weather regions — Designed to handle rain and snow effectively
Builders value the 9/12 pitch for its combination of protection and visual impact. It’s a great choice for homes needing strong drainage and standout curb appeal.
Overall, the 9/12 roof pitch offers excellent weather resistance and bold architectural style, making it a reliable option for demanding climates.