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Roof Pitch Formula:
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A 5 degree roof pitch represents a very low-slope roof with a gentle incline. This pitch is commonly used in modern architecture, commercial buildings, and areas with low rainfall. The pitch is expressed as a ratio of vertical rise to horizontal run.
The roof pitch calculation formula:
Where:
Calculation Method: Multiply the horizontal run by tan(5°) to find the vertical rise, or use the simplified ratio 1:13.6 for quick estimates.
Details: 5 degree pitches are ideal for metal roofs, membrane roofing systems, and in regions with minimal snow load. They provide adequate drainage while maintaining a low profile appearance.
Instructions: Enter the horizontal run distance in feet, select whether to calculate rise or pitch ratio, and click calculate. The calculator will provide the corresponding vertical rise or display the pitch ratio.
Q1: Is 5 degree pitch suitable for all roofing materials?
A: No, some materials like traditional shingles require steeper pitches. 5 degree pitches work best with specialized low-slope roofing systems.
Q2: What's the minimum pitch for proper drainage?
A: Generally, 2-3 degrees is considered minimum for adequate water runoff, making 5 degrees sufficient for most applications.
Q3: How does pitch affect snow load capacity?
A: Lower pitches retain more snow, so 5 degree roofs in snowy regions require stronger structural support and proper snow guards.
Q4: Can I convert pitch ratio to degrees?
A: Yes, use the formula: degrees = arctan(rise/run). For 1:13.6, degrees = arctan(1/13.6) ≈ 4.2° (slight rounding difference).
Q5: What building codes apply to 5 degree pitches?
A: Local building codes vary, but most require specific underlayment, flashing details, and material specifications for low-slope roofs.