Tar and Gravel Roof Cost Calculator – Estimate Your Roofing Cost Easily

A tar and gravel roof is a popular flat-roofing option known for its durability and weather resistance. It’s made by layering tar, roofing felt, and gravel to create a strong waterproof barrier.

If you’re planning to install or replace a tar and gravel roof, estimating the total cost is essential. That’s where the Tar and Gravel Roof Cost Calculator helps — it quickly gives you an accurate idea of your project’s total expenses.

Formula to Calculate Tar and Gravel Roof Cost

The total roof cost is calculated using a simple formula:

$\text{Total Roof Cost}=\text{Roof Area}\times (\text{Tar Cost per sq ft}+\text{Gravel Cost per sq ft}+\text{Labor Cost per sq ft})$

Formula for Average Cost per Square Foot

To find the average cost per square foot:

$\text{Average Cost per sq ft}=\frac{\text{Total Roof Cost}}{\text{Roof Area}}$

Example Calculation

Let’s take an example to understand it better:

• Roof Area = 2,000 sq ft
• Tar Cost = $2.50 per sq ft
• Gravel Cost = $1.00 per sq ft
• Labor Cost = $2.00 per sq ft

Step 1: Calculate Total Roof Cost

$\text{Total Roof Cost}=2000\times (2.50+1.00+2.00)=2000\times 5.50=11000$

Total Roof Cost = $11,000

Step 2: Calculate Average Cost per Square Foot

$\text{Average Cost per sq ft}=\frac{11000}{2000}=5.50$

Average Cost per sq ft = $5.50

Why Use a Tar and Gravel Roof?

• Durable: Can last 20–30 years with proper maintenance
• Weatherproof: Excellent protection against UV rays and rain
• Cost-effective: Ideal for large, flat commercial or residential roofs
• Easy to maintain: Damaged sections can be repaired without replacing the entire roof

Final Thoughts

A Tar and Gravel Roof Cost Calculator makes budgeting your roofing project simple and accurate. By entering just a few values, you can estimate material, labor, and total costs in seconds — helping you plan your project smartly and stay within budget.