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Calculate the total material needed including waste for any construction or restoration material. Select a material type to see recommended waste factors.
The calculated quantity before adding waste
Base Quantity
Before waste
1,200.00 sq ft
Waste Quantity
10% of base
+120.00 sq ft
Total Material Needed
Base + waste
1,320.00 sq ft
Waste percentages are general guidelines. Actual waste depends on roof complexity, material type, installer skill, and job conditions. Complex roofs with many hips, valleys, and penetrations will have higher waste than simple gable roofs. Learn more about waste factors
| Material | Typical Waste | Notes |
|---|---|---|
| Shingles (3-tab) | 10% | Standard for simple gable roofs |
| Shingles (architectural) | 12% | Slightly higher due to pattern matching |
| Metal roofing | 8% | Lower waste due to panel sizing |
| Tile (ceramic) | 15% | Higher due to breakage and cuts |
| Siding | 10-12% | Varies by material and wall complexity |
| Drywall | 10% | Standard for typical room layouts |
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