A 4/12 roof pitch — commonly referred to as “4 over 12” — is a widely used moderate roof angle in residential construction. When builders mention “4 over 12,” it means the roof climbs 4 inches vertically for every 12 inches of horizontal distance. This slope equals about 18.43 degrees, offering a reliable balance between good drainage and easy installation.
What Does a 4-12 Roof Pitch Represent?
With a 4/12 pitch, your roof rises 4 inches for every foot of run. This creates an angle of approximately 18.43 degrees and a slope percentage of 33.33%. It’s a comfortable middle ground that works well for homes in areas with moderate weather conditions.
- Pitch: 4/12 (or “4 over 12”)
- Angle in Degrees: 18.43°
- Slope Percentage: 33.33%
- Rafter Length (per 12 inches of run): Approximately 12.65 inches
Want to double-check your roof pitch? Use our roof pitch calculator for instant results.
Is a 4-12 Roof Pitch a Good Choice?
Yes — the 4/12 pitch is an excellent choice for many homeowners. It provides efficient rainwater runoff, is cost-effective to build, and works well with a wide range of roofing materials. Here’s why builders and homeowners like this pitch:
- Efficient drainage for rain and light snow loads
- Suitable for asphalt shingles, metal roofing, and more
- Balanced look that fits many architectural styles
- Safer surface for maintenance and inspection
Installation & Cost Insights
A 4/12 roof pitch makes installation easier compared to steeper slopes. It typically reduces labor time and lowers installation costs since it doesn’t require specialized equipment. Roofing crews appreciate the safer working angle, and homeowners benefit from lower overall project expenses.
How Does a 4/12 Pitch Compare in Degrees to Other Roof Slopes?
With an angle of about 18.43 degrees, the 4/12 pitch sits comfortably between lower slopes like 2/12 and steeper pitches like 6/12 or 8/12. Compared to flatter roofs, it provides better water runoff, but it’s still more manageable than steep, high-angle roofs — making it a great middle option for both aesthetics and practicality.
What is the Angle in Degrees for a 4-12 Roof Pitch?
The angle for a 4/12 pitch is approximately 18.43 degrees. If you’re comparing pitches or planning a project, our full roof pitch chart provides angles and percentages for all common roof pitches.
Understanding the degree measurement of your roof helps you choose the right materials, estimate costs, and ensure proper installation. The 4/12 pitch hits a sweet spot between ease of construction and reliable performance.
Where Do You See 4/12 Roof Pitches?
The 4/12 roof pitch is a favorite across a variety of architectural styles, especially where moderate slope and cost-effectiveness are desired. You’ll commonly see this pitch used in these types of roofs:
- Craftsman-style homes — Steep lines and solid drainage, often with gable roofs
- Mountain cabins — Designed for snowy climates, with sharp roof angles
- Detached garages and sheds — Matches main house slope for visual consistency
- Covered porches and additions — Integrates smoothly with steeper main roofs
- Regions with heavy rain or snow — Keeps water and snow moving efficiently
Builders appreciate the 4/12 pitch for its versatility across many architectural designs. It provides enough slope for water runoff while keeping the construction straightforward and cost-effective.
In regions with moderate rainfall, the 4/12 pitch delivers excellent performance while giving homes a balanced, attractive roofline. It’s also safer for maintenance work compared to steeper roofs.
Overall, the 4/12 roof pitch is a dependable, budget-friendly option for a variety of home designs. It combines aesthetic appeal, practicality, and ease of construction — making it a go-to choice for builders and homeowners alike.