What Is A Square In Roofing? A square in roofing is a standardized unit of measurement used by contractors and roofers to calculate materials and costs. It refers to 100 square feet (10 feet by 10 feet) of roofing coverage, making it easier to estimate shingles, underlayment, and labor.
This Roofing Square Measurement Guide helps ensure accuracy when replacing or installing a new roof. Understanding roofing squares allows you to make informed decisions, avoid waste, and control expenses effectively.
Why Do Roofers Use Squares Instead of Square Feet?
Using roofing squares instead of square feet simplifies large-scale calculations. Since roofing materials like shingles, tiles, and metal panels are sold in bundles designed to cover specific areas, breaking measurements into squares helps contractors quickly estimate how many materials they need.
For example:
- A 1,500 square foot roof equals 15 squares (1,500 ÷ 100 = 15).
- A 2,000 square foot roof equals 20 squares.
How to Calculate Roofing Squares
To determine the number of roofing squares on your home:
- Measure the length and width of each roof section.
- Multiply length × width to find the area in square feet.
- Divide the total square footage by 100 to get the number of squares.
Example Calculation:
- If a roof section measures 30 feet × 40 feet, its area is 1,200 square feet.
- 1,200 ÷ 100 = 12 squares of roofing.
How Many Shingles Are in a Roofing Square?
Shingles are typically packaged in bundles, with three bundles equaling one square. The exact number varies by shingle type:
- Asphalt shingles: 3 bundles per square
- Wood shingles: 4 bundles per square
- Metal roofing panels: Depends on panel size
For example, if your roof is 20 squares, you’d need 60 bundles of asphalt shingles (20 × 3 = 60).
How Roofing Squares Affect Cost Estimates
Most roofing contractors charge per square for labor and materials. The total cost depends on:
- Roofing material (asphalt, metal, tile, etc.)
- Complexity of the roof (steep pitches, multiple sections)
- Labor costs in your area
Typical price per square (including materials & labor):
- Asphalt shingles: $300 – $600 per square
- Metal roofing: $800 – $1,500 per square
- Clay tiles: $1,200 – $2,500 per square
For a 20-square roof with asphalt shingles, costs range from $6,000 – $12,000.
FAQs
How many squares is a 2,000-square-foot roof?
A 2,000-square-foot roof is 20 squares (2,000 ÷ 100 = 20).
How many bundles of shingles do I need for 25 squares?
For asphalt shingles, you’d need 75 bundles (25 × 3 = 75).
What factors increase the number of squares on a roof?
Roof pitch, dormers, valleys, and overhangs add surface area, increasing square count.
How much does one square of roofing cost?
Costs vary by material but range from $300 – $2,500 per square.
Do I need extra shingles beyond my total square count?
Yes, buy 5-10% extra for waste, cuts, and future repairs.
Conclusion
Understanding what a square in roofing is helps homeowners and contractors estimate roofing projects accurately. By knowing how many squares your roof requires, you can better budget for materials and labor, ensuring a smooth and cost-effective roofing job.
