If you’ve ever asked yourself what is a square in roofing, you’re not alone—and knowing the answer could save you hundreds of dollars on your next project. In roofing, a square is a unit of measurement that equals 100 square feet of roofing surface.
So, if a contractor says your roof needs 20 squares of shingles, that means they’re covering 2,000 square feet.
Knowing what is a square in roofing helps you understand material needs, labor costs, and the overall size of your project. It’s a key concept that contractors use every day—and one that can help you feel more confident when reviewing a roofing bid.
Why Do Roofers Use Squares Instead of Square Feet?
Roofers use squares because it’s a faster, standardized way to calculate and communicate material and labor needs. Instead of saying “2,300 square feet,” they’ll say “23 squares.” This makes estimates quicker and more consistent—especially since most roofing materials (like shingles) are packaged and priced per square.
So when you’re comparing roofing quotes, knowing what is a square in roofing can help you spot red flags like overestimates or vague pricing.
How to Calculate Squares for Your Roof
To figure out how many squares your roof has, divide the total square footage of your roof by 100. But keep in mind that your roof surface area is usually larger than your home’s square footage due to slope and overhangs.
Basic formula:
Total Roof Square Footage ÷ 100 = Number of Squares
Example:
If your roof is 2,400 square feet, then you have 24 squares.
To get an accurate square count, you’ll need to measure your roof or check your contractor’s estimate. Understanding what is a square in roofing ensures you’re paying for the right amount of materials—not more than you need.
How Squares Affect Cost, Labor, and Materials
Most roofing contractors base their pricing per square, which is why it’s so important to understand what is a square in roofing before signing off on an estimate. A square doesn’t just measure the amount of shingle coverage—it often bundles in several cost-driving components that affect your final price.
Here’s how a square typically breaks down on a quote:
Accessories and Extras Some estimates include starter shingles, ridge caps, ice and water shield, synthetic underlayment, or ventilation—while others don’t. Always confirm what each square includes.
Material Cost per Square The type of material you choose—whether it’s 3-tab asphalt shingles, architectural shingles, metal panels, or synthetic slate—heavily influences your per-square cost. Asphalt shingles might range from $100–$150 per square, while metal roofing can go from $300–$700 or more per square depending on gauge and finish.
Labor Cost per Square Labor includes not only laying the new roofing but also tearing off the old one, installing underlayment, flashing, vents, and cleaning up debris. Labor rates vary by region and roof complexity but typically range from $100–$300 per square.
Tear-Off and Disposal Removing the old roof adds cost per square, especially if you have multiple layers to remove or if local disposal fees are high. This is often folded into the labor cost but can appear as a separate line item.
Waste Factor Contractors generally add 10% to 15% to the total square count to account for waste, cuts, and overlapping edges. Roofs with lots of valleys, hips, or dormers may require even more. This means your materials may be ordered based on 33 squares instead of 30.
Roofing Materials by Square: What You Really Get
When a contractor says you need “25 squares,” what exactly are you paying for? Here’s what typically goes into a square in roofing:
| Material Type | How It’s Measured per Square |
|---|---|
| Asphalt shingles | 3 bundles per square |
| Synthetic underlayment | Usually sold per square (covers 100 sq ft) |
| Metal roofing panels | Measured per square, including overlap coverage |
| Rolled roofing | Typically 1 roll = 1 square |
| Wood shakes or tile | Bundled or boxed by the square |
Keep in mind that what is a square in roofing often includes not just the visible surface, but also ridge caps, starter strips, nails, adhesives, and sometimes labor costs as well—depending on how your quote is structured.
If you’re ever unsure, just ask for a material breakdown. A trustworthy contractor like BCM Roofing will always help you understand what you’re paying for—and why.
Why Homeowners Should Understand Roofing Squares
Roofing projects are major expenses—and a lack of clarity can cost you. If you don’t understand what is a square in roofing, it’s easy to be confused by high estimates, generic quotes, or vague numbers.
With this knowledge, you’ll be able to:
- Spot inflated estimates
- Ask smarter questions
- Understand waste percentages
- Avoid surprise material charges
Simply put: learning what is a square in roofing helps you save money and make more confident decisions.
Quick Recap: What Is a Square in Roofing?
- A square = 100 square feet of roofing
- It’s the industry standard unit for materials and labor
- Most estimates are based on the number of squares, not total square footage
- To find your number of squares, divide your roof’s square footage by 100
Now that you know what a square in roofing means, you’re in a stronger position to understand costs, compare quotes, and ask informed questions during your next roofing project.
Final Thoughts
Understanding what is a square in roofing might seem like a small detail—but it plays a big role in roof pricing, materials, and scope. If you’re planning a roof replacement or comparing bids, this knowledge empowers you to read estimates more accurately and avoid unnecessary costs.
Need help reviewing a roofing quote or calculating how many squares you need? Reach out to BCM Roofing for a trusted, transparent estimate tailored to your home.
FAQ: What Is a Square in Roofing?
How many shingles come in a square?
Most standard asphalt shingles are packaged with three bundles per square. One square = three bundles.
How do I know how many squares my roof has?
You’ll need to measure your roof’s surface area or ask your contractor for the total square footage. Then divide by 100.
Is a roofing square different from a square foot?
Yes. One square equals 100 square feet. It’s a simplified measurement used only in roofing.
Do all roofers use squares?
In the U.S., yes—most roofers quote and price jobs using squares. It’s the industry standard.
Can understanding squares really save me money?
Absolutely. When you understand what is a square in roofing, you’re less likely to overpay for materials, labor, or waste you don’t need.
