Shingles
2025-09-30 - 05:39
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Understanding how many bundles of shingles make up a square (sq.) is essential for any roofing project. Whether you’re installing traditional asphalt shingles or opting for tile, accurate calculations prevent costly over‑ordering or unexpected shortages.
What Is a “Square” in Roofing?
A roofing square equals 100 square feet of roof surface. This unit is used universally by manufacturers and contractors to simplify ordering and pricing.
Standard Shingle Coverage
Most asphalt shingles are sold in bundles. The coverage per bundle varies by style:
- Three‑tab shingles: 1 bundle ≈ 33.3 sq ft (covers roughly one‑third of a square).
- Architectural (laminated) shingles: 1 bundle ≈ 30 sq ft.
- Premium or specialty shingles: 1 bundle ≈ 25–28 sq ft.
Therefore, to complete a full square you typically need:
- Three bundles of three‑tab shingles (3 × 33.3 ≈ 100 sq ft).
- Four bundles of architectural shingles (4 × 30 ≈ 120 sq ft) – you’ll have a small excess, which is normal.
- Four to five bundles of premium shingles, depending on the exact coverage rating.
Tile Roofing: A Different Calculation
Tile roofing (clay or concrete) isn’t measured in bundles but in pieces. A standard tile covers about 0.5 sq ft, so a square (100 sq ft) requires roughly 200 tiles. However, manufacturers often list a “square” of tile as a pre‑packed pallet containing the exact number of pieces needed for 100 sq ft, plus an additional 5‑10 % for waste.
How to Estimate Your Needs
1. Measure the roof area: Multiply length by width for each plane, subtract openings (vents, skylights), and total the square footage.
2. Convert to squares: Divide the total square footage by 100.
3. Apply the appropriate bundle count: Use the table above based on your chosen shingle type.
4. Add waste factor: Add 10 % for cuts and mistakes (especially on complex roofs).
Quick Example
Imagine a 1,800 sq ft roof using architectural shingles:
- Total squares = 1,800 ÷ 100 = 18 squares.
- Bundles needed = 18 × 4 = 72 bundles.
- Including 10 % waste = 72 × 1.10 ≈ 79 bundles.
Key Takeaways
Accurate ordering starts with knowing how many bundles make a square. For three‑tab shingles, it’s three bundles per square; for architectural, four bundles; and for tile, roughly 200 pieces per square. Always factor in a waste allowance, especially on roofs with many angles or penetrations.
By following these guidelines, you’ll ensure a smoother installation, stay within budget, and avoid the hassle of last‑minute material trips.
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