Flat Roof Replacement Costs

Flat roofs are a popular commercial fixture because they can easily accommodate heavy rooftop equipment and foot traffic from repair teams. They’re durable, cost-effective, and help protect the building. However, while they don’t have shingles and the frequent repair demands of residential roofs, flat roofs can’t last forever.

In Florida, conventional flat roofs may only last for ten years due to the high temperatures and constant sunlight. Newer materials can even last up to twenty years. When it’s time for a new flat roof installation, ensure you have a clear idea of your budget and likely spending. The experts at A&E Roofing Brothers have a collective experience of over 50 years of repairing and replacing local roofs, and we’re here to help you calculate the costs for a new roof in the Miami-Dade area.

Read through this quick price guide on flat roof replacement costs before calling us for a free quote.

Flat Roof Replacement Cost Per Square Foot

Both commercial and residential roofs are often measured in units called ‘squares.’ This unit is one hundred square feet. The bigger your roof, the bigger the price tag (though additional features and choosing more expensive materials can also affect the final price). The first step is to measure the area of your flat roof to start estimating the anticipated flat roof replacement cost.

Flat Roof Installation Cost

Generally, expect the flat roof cost per square foot to be between $2.50 and $9, or approximately $250 to $900 per roofing square. Because flat roofs don’t have the sharp slope that many residential roofs have, the actual size of the roof will be smaller than that of a comparably sized residential property.

Cost to Replace a Flat Roof

The total cost of replacing your flat roof in Florida will include these elements:

  • The materials for the new roof (such as modified bitumen, TPO, or spray foam)
  • Removal and disposal of the old roof
  • Any repairs that need to be made to the structure or building envelope
  • Labor

Talk to a roofing service about a free quote that includes all of the costs of replacing your roof so you can budget accurately. The answer to the question, “How much does it cost to replace a flat roof?” will vary for every property.

Flat Roof Material

Three popular materials for commercial flat roofs are thermoplastic polyolefin (TPO), spray foam, and modified bitumen. Each one offers different advantages and has a different price.


TPO is a roofing membrane that offers great energy efficiency at an affordable price. The white surface can reflect the sun’s heat away from the building, keeping temperatures cooler and protecting the underlying structure from heat damage. It can also handle pooling water from storms. The material is recyclable, making it a great fit for buildings that prioritize sustainability.

Spray Foam

Spray polyurethane foam or SPF is applied as a thick coat of spray. As it dries, it forms a rigid, sturdy membrane that is lightweight but resistant to the elements. The membrane can insulate the underlying surface, minimizing heat transfer to keep cooling bills lower.

Modified Bitumen

Modified bitumen is a sturdy asphalt roofing membrane that’s built to last. It’s thick, can handle foot traffic, and can even be installed with multiple membrane layers. The materials and installation price is steeper than other options, but many building owners prefer it because it can last up to 20 years or even longer — even throughout Florida’s high temperatures and long, sunny summers. The material is incredibly durable and can even self-repair punctures because of the rubbers and solvents mixed into the asphalt compound.

Why It’s Important to Hire a Pro

Each type of flat roof requires specialized knowledge and tools to install correctly. Working with a pro ensures the material is installed and handled safely. It also extends the lifespan of the roof because experienced experts can avoid common installation gaps. The right roof installation team can also offer a warranty for the materials and/or labor to protect your investment.

Choose A&E Brothers Roofing to Get Started on your Flat Roof Replacement

Talk to A&E Brothers Roofing today to learn more about the flat roof replacement cost for your building. Schedule an appointment for a free quote, or call us to learn more about the materials and roofing services we offer for residential and commercial property owners.

Image Source: Mabeline72 / Shutterstock

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