Pitch Multiplier Table
| Pitch | Angle | Multiplier | Walk On? |
|---|---|---|---|
| 0/12 | 0° | 1.000 | Yes |
| 4/12 | 18.4° | 1.054 | Yes (careful) |
| 6/12 | 26.6° | 1.118 | With caution |
| 8/12 | 33.7° | 1.202 | Difficult |
| 10/12 | 39.8° | 1.302 | Harness required |
| 12/12 | 45° | 1.414 | Harness required |
Shingle Types and Lifespan
| Type | Cost/Square | Lifespan | Bundles/Square |
|---|---|---|---|
| 3-Tab Asphalt | $80–100 | 15–20 years | 3 |
| Architectural (dimensional) | $100–150 | 25–30 years | 3–4 |
| Premium/Designer | $150–300 | 30–50 years | 4–5 |
| Metal roofing | $300–700 | 40–70 years | N/A (panels) |