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
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.