12:12 Roof Pitch
12/12 is the iconic 45-degree roof pitch — the most dramatic common pitch, reserved for authentic traditional architecture and extreme snow zones.
⛰️ Steep Pitch
Pitch Ratio
12:12
Angle
45.0°
Slope
100.0%
Rise per 12" Run
12 inches
🏠 Common Uses for 12:12 Pitch
- •Authentic Cape Cod and saltbox colonials
- •Gothic revival architecture
- •Steep-roof churches and chapels
- •A-frame houses and cabins
- •Maximum-snow regions (Alaska, high altitude)
🌦️ Best Climate Fit
- •Extreme snow regions where snow must shed itself
- •High-altitude mountain homes
- •Areas with ice dam history
✅ Advantages
- ✓Snow and ice cannot accumulate — self-shedding
- ✓Iconic, authentic traditional appearance
- ✓Maximum usable attic/loft space
- ✓Longest roof lifespan (minimal heat + water exposure)
- ✓Striking curb appeal
⚠️ Drawbacks
- ×40%+ higher cost than 6/12 pitch
- ×Very limited roofer pool — expert-only work
- ×High wind uplift in exposed regions
- ×Harder and more expensive to insure
- ×May not match surrounding neighborhood aesthetic
- ×Building codes may limit in some jurisdictions
🧱 Recommended Materials for 12:12
Standing Seam MetalArchitectural Shingles (with extra fastening)Slate (premium installations)Wood ShinglesClay Tile
About 12:12 Pitch
A 12:12 (also written as 12/12) roof pitch means the roof rises 12 inches for every 12 inches of horizontal distance. Expressed as an angle, this is approximately 45.0 degrees, with a slope of 100.0%.
Metal roofing, slate, clay/concrete tiles, or cedar shakes. Steep pitch provides excellent drainage and durability.
Compared to a flat roof of the same footprint, a 12:12 pitch roof has about 41.4% more surface area due to the slope. Factor this into your material calculations using a pitch multiplier of ×1.414.