Materials Margin Calculator
Pitch. Squares. Ridges. Valleys. Drip edge. Get the bundle count and the material cost — then see what an integrated takeoff saves vs. a tape measure on the truck.
Plug in your job
Numbers you take off the roof every day. Bundles, waste factors, and accessory prices follow GAF + Owens Corning installation specs and HomeAdvisor 2024 national data.
Plus $373 saved per job from integrated takeoff. Annualized across 180 jobs: +$67k.
| Line item | Detail | Cost |
|---|---|---|
| Field material | 78 bundles | $10,109 |
| Underlayment | 2,400 sqft @ $0.45/sqft | $1,080 |
| Ice + water | 480 sqft @ $0.95/sqft | $456 |
| Ridge cap | 45 lf | $248 |
| Valleys | 28 lf | $252 |
| Drip edge | 160 lf | $448 |
| Starter strip | 120 lf | $288 |
| Total material | — | $12,880 |
| Time saved on takeoff | 1.5 hrs | +$51 |
| Margin recapture (waste / re-orders) | 2.5% of material | +$322 |
| Annual savings (180 jobs) | — | +$67,141 |
On THIS job: $12,880 of material + $373 you stop leaving on the floor when the takeoff lives in the system. Across 180 jobs a year: +$67k.
Every roofer can do this math in their head. The leak isn't the calculation — it's the 90 minutes per job + the 2.5% margin per job that disappears between "looks right on the truck" and "looks right on the invoice."
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