Roof Sheathing Calculator
Estimate roof sheathing sheets and cost
Total roof area in sq ft
Common sheathing size
1/2" standard
Roof Area
—
sq ft
Sheathing Sheets
—
sheets
Fasteners Needed
—
nails/screws
Estimated Cost
—
USD
Disclaimer: Results are estimates based on standard formulas. Not a substitute for professional advice from a licensed contractor, engineer, or architect. Verify all calculations before making purchasing or construction decisions.
How to Use This Calculator
Roof sheathing supports shingles and transfers loads to the framing. Our calculator estimates sheets, cost, and fasteners needed.
- Calculate total roof area
- Select sheathing sheet size
- Choose thickness based on rafter spacing
- Add 10% waste
AI Insights
Smart analysis for your project
Smart Estimates
Our AI cross-references material costs, regional pricing, and project complexity for more accurate estimates.
Waste Optimization
AI-calculated waste factors based on project type, not flat percentages. Saves 5-15% on material costs.
Best Practices
Recommendations derived from building codes, contractor data, and thousands of completed projects.
Calculation Formula
Sheets = Roof area / Sheet area + 10% waste
Fasteners = Sheets x 60 (8d nails per sheet)
Frequently Asked Questions
What thickness roof sheathing do I need?
1/2" OSB or plywood is standard for 24" truss/rafter spacing. Use 5/8" for 32" spacing or heavy snow loads.