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What is a Roofing Calculator?
A Roofing Calculator estimates the amount of roofing material (e.g., shingles, tiles) needed for a roof based on its dimensions and pitch, and provides an approximate cost.
Roof pitch affects the actual surface area, and different materials have varying coverage rates and costs. This calculator uses standard coverage rates (e.g., 3 bundles of shingles per 100 sq ft) and average material costs for estimates.
Asphalt Shingles vs. Metal Roofing vs. Tile Roofing
| Material | Coverage (sq ft/bundle) | Cost ($/sq ft) | Durability |
|---|---|---|---|
| Asphalt Shingles | 33.3 | 1-2 | 20-30 years |
| Metal Roofing | 100 | 3-7 | 40-70 years |
| Tile Roofing | 10-20 | 4-10 | 50+ years |
How to Use the Roofing Calculator
- Roof Area Dimensions: Enter the length and width of the roof area.
- Pitch: Input the roof pitch (e.g., 4/12 for a 4:12 slope).
- Material Type: Select the roofing material (e.g., asphalt shingles, metal).
- Unit: Choose the unit of measurement (feet or meters).
- Calculate: Determine the amount of roofing material and estimated cost.
Frequently Asked Questions (FAQ)
Does the calculator include waste factor?
Yes, the calculator adds a 10% waste factor to account for cutting, overlaps, and errors. Adjust manually for complex roofs.
How does roof pitch affect the calculation?
Roof pitch increases the actual surface area. The calculator adjusts the area using a pitch multiplier (e.g., 1.12 for a 4/12 pitch).