Metal Roofing Panel Comparison
| Panel Type | Min Pitch | Material $/sq ft | Lifespan |
|---|---|---|---|
| Standing Seam | 1/12 | $2.50–6.00 | 50–70 yrs |
| R-Panel (exposed) | 2/12 | $1.50–3.50 | 30–45 yrs |
| Corrugated | 3/12 | $1.00–2.50 | 30–40 yrs |
| Metal Shingles | 3/12 | $3.00–7.00 | 40–60 yrs |
Frequently Asked Questions
How many squares of metal roofing do I need?+
Measure your flat footprint (length × width), multiply by the pitch factor (√(rise²+144)/12), add 10% waste, then divide by 100 to get squares. A 40×30 ft house at 4/12 pitch = 1,200 × 1.054 = 1,265 sq ft + 10% = 13.9 squares.
How much does metal roofing cost per square?+
Materials run $100–400 per square (100 sq ft) depending on panel profile and gauge. Installed, standing seam costs $300–700/square. R-panel installed runs $150–350/square. Metal shingles fall between. Request quotes from at least three contractors — regional pricing varies significantly.
How long does metal roofing last?+
Steel panels last 40–70 years; aluminum 50+ years. Exposed-fastener profiles are limited by fastener life (30–45 years). Standing seam avoids this failure mode and typically lasts the full 50–70 year range. Most metal roofs outlast the life expectancy of the building.
What pitch is too low for metal roofing?+
Standing seam can handle pitches as low as 1/12 with proper underlayment. R-panel and corrugated need at least 2/12–3/12 to prevent water infiltration at exposed fasteners. Below 2/12, specify a concealed-fastener system with continuous urethane sealant at laps.