What is 5:12 in degrees?

A 5:12 roof pitch equals 22.6° — the roof rises 5 inches for every 12 inches of horizontal run. As a grade that is 41.7%, and the pitch (slope) factor used for area is ×1.083.

What roofing materials can I use on a 5:12 roof?

At 5:12, the materials that meet their minimum-slope requirement are: Membrane (TPO / EPDM / built-up); Standing seam metal (mechanically seamed); Asphalt shingles (low-slope method); Clay / concrete tile; Exposed-fastener / metal shingles; Wood shakes & shingles; Asphalt shingles (standard); Natural slate. That is a code-minimum list, not a recommendation. See the recommended materials above, and always confirm against the product's installation instructions and local code.

How much more material does a 5:12 roof need than a flat roof?

About 8.3% more surface area than the flat footprint, because the slope lengthens every plane. Multiply your footprint area by ×1.083 to get the true roof surface area.

5:12 Roof Pitch

5/12 is a moderate pitch that balances aesthetics, performance, and cost — a popular choice for contemporary residential roofs.

🏠 Standard Pitch

Pitch Ratio

5:12

Angle

22.6°

Slope (grade)

41.7%

Pitch Multiplier

×1.083

Walkability

Walkable with caution

Still walkable for careful, sure-footed work, but footing is noticeably less secure. Avoid when wet. 6:12 is the usual cutoff for comfortable walking.

🏠 Common Uses for 5:12 Pitch

•Contemporary and transitional home styles
•Suburban family homes
•Craftsman-style bungalows
•Commercial light residential

🌦️ Best Climate Fit

•Moderate rainfall regions
•Mixed climates with occasional snow
•Coastal areas with moderate winds

✅ Advantages

✓Good balance of slope and walkability
✓Works with all standard asphalt shingles
✓Sheds water better than 4/12
✓Still relatively economical to build
✓Versatile for most architectural styles

⚠️ Drawbacks

×Not steep enough for heavy snow accumulation
×Still needs proper underlayment for wind-driven rain
×Moderate curb appeal compared to steeper pitches

🧱 Recommended Materials for 5:12

Asphalt ShinglesArchitectural ShinglesStanding Seam MetalCorrugated MetalWood Shakes

Material Compatibility at 5:12

Code-typical minimum slopes (IRC R905 / manufacturer specs). Confirm against your product and local code — see the methodology.

✓Membrane (TPO / EPDM / built-up) — min 0.25:12
✓Standing seam metal (mechanically seamed) — min 0.5:12
✓Asphalt shingles (low-slope method) — min 2:12
✓Clay / concrete tile — min 2.5:12
✓Exposed-fastener / metal shingles — min 3:12
✓Wood shakes & shingles — min 3:12
✓Asphalt shingles (standard) — min 4:12
✓Natural slate — min 4:12

About 5:12 Pitch

A 5:12 (also written as 5/12) roof pitch means the roof rises 5 inches for every 12 inches of horizontal distance. Expressed as an angle, this is approximately 22.6 degrees, with a slope of 41.7%.

Asphalt shingles (most popular), architectural shingles, or wood shakes. Standard residential pitch range.

Compared to a flat roof of the same footprint, a 5:12 pitch roof has about 8.3% more surface area due to the slope. Use our roof area calculator to convert your footprint to actual roof surface, or go straight to shingle and cost estimates with a pitch multiplier of ×1.083.

5:12 Pitch FAQ

What is 5:12 in degrees?: A 5:12 roof pitch equals 22.6° — the roof rises 5 inches for every 12 inches of horizontal run. As a grade that is 41.7%, and the pitch (slope) factor used for area is ×1.083.
Is a 5:12 roof walkable?: Walkable with caution. Still walkable for careful, sure-footed work, but footing is noticeably less secure. Avoid when wet. 6:12 is the usual cutoff for comfortable walking.
What roofing materials can I use on a 5:12 roof?: At 5:12, the materials that meet their minimum-slope requirement are: Membrane (TPO / EPDM / built-up); Standing seam metal (mechanically seamed); Asphalt shingles (low-slope method); Clay / concrete tile; Exposed-fastener / metal shingles; Wood shakes & shingles; Asphalt shingles (standard); Natural slate. That is a code-minimum list, not a recommendation. See the recommended materials above, and always confirm against the product's installation instructions and local code.
How much more material does a 5:12 roof need than a flat roof?: About 8.3% more surface area than the flat footprint, because the slope lengthens every plane. Multiply your footprint area by ×1.083 to get the true roof surface area.

Estimates only. See how this calculator works — the formulas, assumptions, and sources behind it.

Cost Impact of 5:12 Pitch

Modest cost increase over 4:12 — roughly 3% more material. Still walkable for most roofers without special equipment. Often considered the sweet spot between drainage, cost, and ease of construction.

Building Code Notes

5:12 comfortably exceeds the minimum pitch for asphalt shingles. No special underlayment is generally required beyond standard practice in most jurisdictions. Typically meets ventilation requirements for standard ridge and soffit vent configurations.

Calculation Example

For a 32×45ft colonial (1,440 sqft footprint) at 5:12 pitch: roof area = 1,440 × 1.083 = 1,560 sqft, about 15.6 squares. That's approximately 47 bundles of architectural shingles plus 10-15% waste.

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