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Breaking Down Flat Roof Replacement Costs In 2024

Posted on April 10, 2024

Breaking Down Flat Roof Replacement Costs In 2024

Are you worried about the high cost of replacing your flat roof? You are not alone. When it comes to roof replacement, homeowners are often concerned about how much they will pay. Plus, there are several factors involved, which can make it even more troublesome. 

But don’t worry, we are here to explain it all. As a seasoned roofing company in Wisconsin, we have completed dozens of roof replacements and have a good idea about the costs involved. 

In this guide, we will provide you with all the information you need to know about the cost of replacing a flat roof in 2024. We will shed light on the key factors that influence pricing so you can get a better understanding of what to expect. Whether you are dealing with persistent leaks, an old roof, or you just want to upgrade, understanding the costs involved can help you plan your budget and make informed decisions. 

Understanding Flat Roofs

Before we talk numbers, let’s quickly go over what a flat roof is. Contrary to its name, a flat roof isn’t entirely level. It has a slight slope (usually between 1/4 and 1/2-inch per foot) to allow for proper drainage. Flat roofs are commonly found on commercial buildings, apartment complexes, and some homes.

Components Involved In Replacing A Flat Roof

Installing or replacing your flat roof is a complex process and hence can be expensive. Other than the main roofing material, there are several components involved in a flat roof replacement. These include: 

  • Roofing Material
  • Roofing Underlayment
  • Roof Insulation
  • Drainage System
  • Old Roof Removal

How Much Does The Average Flat Roof Replacement Cost? 

Now, let’s crunch some numbers. You can expect to pay between $3,000 and $10,000 for a flat roofing replacement in 2024. But, keep in mind that these are just rough estimates. The actual cost can vary depending on the specific condition of your roof, location, and more.

Factors Affecting Flat Roof Replacement Costs In Wisconsin

Now, let’s get to the part that you are here for. To break down flat roofing costs, we need to talk about the factors involved. These will determine how much you’ll need to shell out for replacing your flat roofing system in Wisconsin. 

Roof Size

The larger the roof, the higher the cost. It’s as simple as that. Like pitched roofing systems, flat roofs are also measured in squares, where one square equals 100 square feet. So, if you have a 2,000-square foot roof, that’s 20 squares.

The cost can also be further influenced by the complexity of the roofing system. For example, the cost might be more if there are protrusions or several elements such as HVAC systems on your roof. 

Here is a breakdown of the cost depending on the size of your roof: 

Size (in square feet)Cost

Roofing Material

When considering flat roof replacement costs in 2024, the type of roofing material you select plays a pivotal role. Here are five popular options and their estimated costs per square foot:

Thermoplastic Polyolefin (TPO): 

TPO is a newer roofing material known for its durability and environmental friendliness. It typically costs between $4 and $14 per square foot. TPO is a popular choice for its energy efficiency and ease of installation, however, in terms of price, it is a little more expensive than its flat roof counterparts such as EPDM.  

TPO Roofing

Ethylene Propylene Diene Monomer (EPDM): 

EPDM is a synthetic rubber membrane that is highly durable and cost-effective. It’s a popular choice for flat roofs and typically costs between $4 and $12 per square foot. EPDM is known for its resistance to UV rays and weather damage.

EPDM Roofing

Modified Bitumen: 

Modified bitumen is an asphalt-based roofing material that comes in roll or cap sheet form. It’s known for its durability and flexibility, making it a popular choice for flat roofs. Modified bitumen can range from $4 to $8 per square foot. It’s a good option for areas with extreme weather conditions.

PVC Roof: 

PVC roofing membranes are known for their longevity and durability. It offers excellent resistance to chemicals, oil, and fire, making it a popular choice for commercial buildings. PVC typically costs between $4 and $7 per square foot.

Green Roof: 

A green roof is very different from the other roofs that we have talked about, as it is not even a roofing material. This is a new age, energy efficient roofing option that is also known as a living roof. It is a roof covered with vegetation planted over a waterproofing membrane. While the initial cost of installing a green roof can be higher, ranging from $10 to $25 per square foot, it offers numerous environmental benefits, including improved insulation, reduced stormwater runoff, and extended roof life.

Roof Accessibility

If your roof is difficult to access, you can expect to pay more for labor. Factors like the building’s height, the presence of obstacles (like skylights or HVAC units), and the slope of the roof can all increase labor costs.

Roof Preparation

Before a new roof can be installed, the existing one needs to be removed, and the surface prepared. This process can involve tearing off the old roofing material, repairing any damaged decking, and applying a new vapor barrier or insulation. The more extensive the preparation, the higher the overall cost.

Labor Costs

Labor costs can vary significantly based on your location and the expertise of the roofing crew. In general, you can expect to pay anywhere from $1.50 to $4 per square foot for labor alone.

When it comes to labor costs for roofing projects, it’s important to keep in mind that the rates can vary based on a few factors. For instance, the location of the property can play a role in determining the labor costs, as rates may differ depending on the state or city where the work is being done. Additionally, the expertise of the roofing crew can also impact labor costs, as more skilled professionals may charge higher rates.


Replacing a flat roof is no small feat, and the costs can quickly add up. However, by understanding the different factors at play, you can make an informed decision and budget accordingly. Remember, investing in a high-quality flat roof replacement is crucial for protecting your home or business from water damage and maintaining energy efficiency.

Best Flat Roof Installation In Wisconsin

If you’re in need of a flat roof replacement, don’t hesitate to reach out to the team of Prestige Roofing. We are a reputable flat roofing contractor serving De Pere and the surrounding areas of Wisconsin. We will provide you with a detailed quote and guide you through the entire process. Also, we only use high-quality roofing materials so you will not have to worry about premature wear or deterioration on your new roof. Contact us today at (920) 791-0414