The roof pitch in degrees determines water runoff, aesthetics, material choice, and structural needs for a building. This guide explains how to measure roof pitch in degrees, convert between rise/run and degrees, and select suitable slopes for various climates and roof types. Accurate measurement and conversion are essential for roofing, design, and safety.
| Common Roof Pitch | Rise/Run | Degrees | Typical Use |
|---|---|---|---|
| Low Slope | 2:12 | 9.46° | Modern flat-look roofs, membranes |
| Moderate | 6:12 | 26.57° | Asphalt shingles, residential |
| Steep | 9:12 | 36.87° | Architectural designs, shedding snow |
| Very Steep | 12:12 | 45° | Tall gables, A-frame cabins |
Example: A roof with 7:12 pitch has a rise/run ratio of 7/12 = 0.5833. Degrees = arctan(0.5833) = 30.25°. Use a scientific calculator, smartphone, or spreadsheet with ATAN function for precise conversion.
| Example | Formula | Result |
|---|---|---|
| 9:12 | arctan(9/12) | 36.87° |
| 5:12 | arctan(5/12) | 22.62° |
| 1:12 | arctan(1/12) | 4.76° |
Frequently Asked Questions About Roof Pitch In Degrees
Can Roof Pitch Be Changed On An Existing Structure?
Yes, but changing roof pitch typically requires altering rafters or adding a new roof structure and may need permits and engineering. Raising the pitch affects load paths, wall heights, and costs significantly.
Is A Higher Degree Pitch Always Better In Snow Areas?
Higher pitch helps shed snow but is not always the best sole solution. Structural design, snow guards, and insulation/ventilation to prevent ice dams are equally important.
How Accurate Must Measurements Be For Roofing Work?
Accuracy to within a fraction of a degree improves flashing and drainage design and ensures materials meet warranty requirements. Measurements within 0.5°–1° are typically sufficient for most roofing tasks.
Sources And Further Reading
Reliable sources include building code texts (IBC), manufacturer installation guides (shingles, metal, membrane), and structural engineering handbooks. Cross-referencing code requirements with manufacturer specs ensures compliant and durable roofing.
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For advanced projects, consult a licensed structural engineer or certified roofing contractor to translate degrees into framing plans and load calculations.
How to Get the Best Roofing Quotes
- Prioritize Workmanship
A roof is one of your home’s most important investments. Always choose a contractor based on experience and reputation — not just price. Poor installation can lead to expensive problems down the road. - Compare Multiple Estimates
Don’t settle for the first quote you receive. It’s always a smart move to compare at least three bids from local roofing professionals. You can 877-801-4315 to get local quotes from roofing contractors in your area, available across the United States. - Use Negotiation Tactics
After selecting a trusted roofer, be sure to use our proven tips — How to Negotiate with Roofing Contractors — to secure the best possible final price without cutting corners.