When managing a commercial property, one of the most critical investments you’ll make is maintaining or replacing your roof. Among the various options available today, a tar and gravel roof remains a popular choice for many property owners. But what should you expect when it comes to costs? This blog dives into the factors that influence the tar and gravel roof cost, helping you make an informed decision that fits your building’s:
- Needs
- Budget
- Style
What Is a Tar and Gravel Roof?

Before we get into costs, let’s take a closer look at what a tar and gravel roof actually is and why it might be a good fit for your commercial property.
A tar and gravel roof, also known as a built-up roof (BUR), is a type of flat roofing system built with alternating layers of asphalt (tar) and reinforcing fabric or felt. These layers are then topped with a layer of gravel, which helps protect the underlying materials from sun exposure, water, and impact damage.
Why Choose a Tar and Gravel Roof?
Tar and gravel roofs are a go-to solution for commercial properties for many reasons, including their durability and cost-effectiveness.
- Longevity: With proper installation and maintenance, a tar and gravel roof can last 20-30 years.
- Water Resistance: The multiple layers of asphalt create a strong waterproof barrier, making it a reliable choice for flat or low-pitched roofs.
- UV Protection: Gravel helps reduce sun damage by reflecting harmful UV rays, which extends the life of the roof and maintains its structural integrity.
- Cost-Efficiency: Compared to newer roofing methods, tar and gravel roofs are often less expensive upfront while still offering excellent protection.
How Much Does a Tar and Gravel Roof Cost?

Now, onto the big question—how much will a tar and gravel roof cost you? The answer can vary significantly based on a range of factors. On average, you can expect to pay between $3 to $8 per square foot for a tar and gravel roof installation or replacement. But there’s more to the story.
Here’s a detailed breakdown of costs to help you understand what goes into this price range and what might influence it.
📏 Size of the Roof
The most obvious factor is the size of your building’s roof. Larger roofs require more materials and labor, driving up the overall cost. For example, if your property has a 10,000-square-foot roof, the base cost could range from $30,000 to $80,000.
If you’re not sure of your roof’s square footage, your contractor can measure the dimensions to provide an accurate estimate.
🔨 Labor Costs
Tar and gravel roofing installation is a highly skilled process that requires experienced professionals. Labor costs can vary depending on your location, but typically range between $50 to $100 per hour. Larger or more complicated projects might require extra workers or specialized skills, increasing labor expenses.
🪵 Type and Quality of Materials
Materials play a significant role in the overall tar and gravel roof cost. There are multiple grades of asphalt and felt to choose from, with higher-quality materials costing more but offering better durability. Similarly, the type of gravel you choose can also affect costs.
- Basic Materials (standard tar and gravel): $3 to $5 per square foot
- High-Quality or Premium Materials (enhanced UV resistance, heavier-duty layers): $6 to $8 per square foot
Investing in higher-quality materials upfront can save you money long-term by reducing maintenance expenses and increasing the lifespan of your roof.
🏚️ Existing Roof Conditions
If you’re replacing or repairing an existing roof, the condition of the current roof can significantly influence costs. Roofing repairs and demolition can add between $1 to $2 per square foot to the total price.
For properties with significant structural damage or poor drainage, additional costs may include repairs to the substrate or the installation of a new drainage system.
📍Location
Where your property is located also plays a role in determining costs. Factors such as local labor rates, material availability, and weather conditions (which can make installation more complex) are all considerations. For instance, areas with extreme weather might require modifications to strengthen the roof, adding to costs.
➕ Additional Features
Lastly, any additional features or upgrades will also impact the final cost. These could include adding extra layers for insulation, installing skylights or drains, or applying reflective coatings to enhance energy efficiency. Each of these upgrades can add anywhere from $500 to $5,000+, depending on their complexity.
Maintenance Costs for Tar and Gravel Roofs
While tar and gravel roofs are durable, they do require some maintenance to ensure longevity. Annual inspections, minor patches, or gravel replacement may cost around $0.50 to $2 per square foot per visit.
Pro Tip
Scheduling annual maintenance can catch small issues before they turn into costly repairs. Ongoing care can easily help your roof last 25+ years, making it a cost-effective investment over time.
Is a Tar and Gravel Roof Right for Your Property?
Here’s a quick look at the pros and cons to help you decide whether this roofing system is the right fit for your building.
👍 Advantages
- Cost-Effective: Lower installation costs compared to some modern alternatives.
- Durable: Resistant to water, UV rays, and even extreme weather conditions.
- Easy Repairs: Damaged areas can often be patched without replacing the entire roof.
- Good Insulation: The layers provide insulation, helping regulate indoor temperatures.
👎 Potential Drawbacks
- Weight: A tar and gravel roof can be heavy, requiring a structurally sound property for proper support.
- Limited Slope: Best suited for flat or low-sloped roofs only.
- Requires Maintenance: Regular upkeep is necessary to avoid leaks and extend the roof’s lifespan.
How Does a Tar and Gravel Roof Compare to Other Roofing Options?
If you’re weighing your options, here’s a quick comparison between tar and gravel roofs and two popular alternatives—EPDM and TPO roofing.
Tar and Gravel
- Cost: $3–$8 per square foot
- Lifespan: 20–30 years
- Best For: Durability and cost-efficiency
EPDM Roofing
- Cost: $4.50–$10 per square foot
- Lifespan: 25–30 years
- Best For: UV and weather resistance
TPO Roofing
- Cost: $5–$12 per square foot
- Lifespan: 15–20 years
- Best For: Energy efficiency and white membranes for cooler roofs
How to Get an Accurate Estimate
If you’re ready to invest in a tar and gravel roof, the next step is getting an accurate estimate from an expert contractor. Remember, every building is unique, so working with a professional ensures no surprises during or after installation.
At Northface Construction, we specialize in durable, high-quality roofing solutions tailored to suit your commercial property’s exact needs. Our experienced team will guide you through every part of the process, from selecting materials to calculating costs and creating a maintenance plan.
Call Northface Construction Today
The tar and gravel roof cost is just one piece of the puzzle when it comes to protecting your commercial property. At Northface Construction, we believe your investment should deliver durability, efficiency, and value for years to come.Need an estimate? Contact our team today to get started! Together, we’ll find the roofing solution that works for your building and your budget.