1. What is the Roof Shingle Coverage Calculator?

The Roof Shingle Coverage Calculator helps determine how many bundles of shingles are needed to cover a roof based on its size. It accounts for the coverage area of each bundle, typically 33 square feet for standard 3-tab shingles.

2. How Does the Calculator Work?

The calculator uses a simple formula:

Where:

• \( Area \) — Total roof area in square feet
• \( Coverage\ per\ bundle \) — Typically 33 sq ft for standard shingles

Explanation: The result is always rounded up since you can't purchase partial bundles of shingles.

3. Importance of Accurate Shingle Calculation

Details: Proper calculation prevents material shortages or excess purchases, helps with budgeting, and ensures complete roof coverage without multiple deliveries.

4. Using the Calculator

Tips: Measure your roof area accurately in square feet. For complex roofs, divide into sections and sum the areas. Always add 10-15% extra for waste and starter courses.

5. Frequently Asked Questions (FAQ)

Q1: How do I measure my roof area?
A: Multiply length by width for each roof plane and sum all planes. For steep roofs, use a pitch multiplier.

Q2: What's the typical coverage per bundle?
A: Standard 3-tab shingles cover about 33 sq ft per bundle, while architectural shingles may cover less (typically 25-30 sq ft).

Q3: Should I add extra for waste?
A: Yes, add 10-15% extra for cutting waste, starter courses, and future repairs.

Q4: Does roof pitch affect the calculation?
A: The area should account for pitch (use "roof area" not "footprint area"). Steeper roofs may require more for safety.

Q5: How many bundles in a square?
A: A "square" equals 100 sq ft of coverage. Typically 3 bundles per square for standard shingles.