Roofing Estimator Cheat Page
Learn the Basics of Roofing Plan Reading & Estimating
1. Understanding Roofing Plans
- A Sheets: Roof plan, slope arrows, drainage, material tags
- Detail Sheets: Edge, curb, flashing, and parapet details
- Schedules: Roof system types, thickness, insulation, fasteners
- Notes: Includes slope direction, taper plans, drainage points
Always confirm roofing square footage — don't forget overhangs and parapet caps!
2. Takeoff Basics
- Measure roof area in square feet (or squares – 100 SF)
- Break down by membrane type, insulation, and flashing type
- Include roof curbs, drains, penetrations, and accessories
- Account for ladders, staging, and safety rails if required
Use drone photos or satellite takeoff tools for re-roof validation!
3. Manhour & Labor Estimating
- Low-Slope Membrane: ~0.40–0.60 hr/SF
- Shingle Roof: ~0.30–0.45 hr/SF
- Insulation Boards: ~0.10 hr/SF
- Flashing/Curbs: ~0.5–1.0 hr/each
Add labor for tear-off, staging, and weatherproofing!
4. Building the Estimate
- Material Cost: Roofing membrane, fasteners, insulation, sealant, curbs
- Labor Cost: Total manhours × rate (e.g., $70/hr)
- Waste Factor: Add 10–15% for cuts, overlaps, and penetrations
- OH&P: Apply markup to total cost
Create assemblies for each roof type to speed up recurring estimate formats
5. Downloadable Tools
- 📥 Roofing Labor Chart (PDF)
- 📥 Roof Takeoff Template (Excel)
- 📥 Square-to-SF Calculator (Excel)
- 📥 Roofing System Types Legend (PDF)
Use the square-to-SF calculator for fast plan conversions!