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Repairing or Replacing Flat Roofs in Florida: Everything You Need to Know

September , 2023 | 12 min. read

By David Toth

Are you tired of a leaky flat roof and ready for a change? Sick of trying to find reliable information about flat roof replacements in Florida?

We get it.

We've been there. Repairing a roof is never a walk in the park, but flat roofs in Florida come with their own set of challenges. Coastal weather, material options, and of course, cost.

commercial roofing company tearing off a flat roof with the text teamwork on the image

But don't worry, our team has you covered. RoofCrafters, our family, has 30 years of experience in replacing flat roofs. And yes, we know roofing is pretty boring. But we’re still going to do our part to answer all the questions and concerns. So that, you'll have the info needed to make a smart choice about replacing your flat roof. And we're here to make it all a little less boring.

In this article, we'll cover:

  • Flat roofs commonly installed on residential homes
  • Flat roofs that are best for coastal regions
  • Mod-bit and TPO roofing
  • The cost of Mod-bit and TPO roofing 

Let's get started.

What Types of Flat Roofs are Installed on Residential Houses?

 

TPO roof being installed on a residential flat roof

When you picture flat roofs, you likely think of buildings like malls and medical centers. Yet, many architects design houses with flat roof structures. Sometimes, people want a specific design or need rooftop space for mechanical or AC equipment. Many people construct homes with flat roofs for various reasons.

There are several types of flat roofs available for houses, including:

  • Built-up roofing (BUR)
  • Modified bitumen roofing(Mod-bit)
  • Single-ply membrane roofing (such as EPDM, PVC, or TPO)
  • Spray polyurethane foam (SPF) roof
  • A green roof or vegetative roof
  • Metal roofing 
  • Liquid Applied Roofing
  • Coating Systems

The best type of flat roof for a house depends on the climate, design, and budget.

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What Flat Roof is Best for Coastal Regions?

 

In areas by the coast, it's suggested to have a flat roof that can withstand strong winds, heavy rain, saltwater, and sunlight. A few options include:

  • Single-ply membrane roofs (such as TPO or PVC) - These are resistant to UV rays. They're designed to be flexible, allowing them to withstand high winds.
  • Modified Bitumen (Mod-bit) - Mod-bit roofing is long-lasting, durable, and resistant to water and wind damage. Making them a popular choice for flat roofs on homes in coastal regions.
  • Metal roofing - Metal roofs are very durable and resistant to corrosion caused by salt air. It can be a good long-term option for coastal regions.
  • Built-up roof (BUR) - This type of flat roof is made up of layers of asphalt and reinforcement, providing a strong barrier against water and wind damage.
  • Spray polyurethane foam (SPF) - This type of roofing is highly resistant to water and wind damage. It also provides insulation, which can help to reduce energy costs.
  • Coating systems - Specialized coatings can be applied over existing flat roofs. This is to provide more protection against UV rays, water, and wind damage.

It's important to consult with a professional flat roofing contractor. One who is familiar with the specific weather conditions in your area and can recommend the best option for your house.

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Additionally, you can also consult with the local building department. For codes and regulations on the best-suited roofing material for your coastal region.

What Flat Roofing is Best for a Residential Home?

 

mod-bit flat roof over a porch

The type of flat roofing that is best for a residential home will depend on factors such as budget, climate, and the homeowner's preferences. We recommend the following:

  • TPO Roofs
  • PVC Roofs
  • Mod-Bit Roofs
  • Metal Roofs
  • Built-Up Roofs

We always recommend that you consult with a professional flat roofing contractor. A local contractor who is familiar with the specific weather conditions in your area and can recommend the best option for your home. 

Is a Mod-Bit a Good Roof for a Residential Home?

 

roofer on flat roofing brooming off the debris

A modified bitumen roof (mod-bit) is used for commercial and industrial buildings. yet, it is also used for residential homes. Some of the benefits of using a mod-bit roof for a residential home include:

  • Durability: Mod-bit roofs are made of a mixture of asphalt and rubber-like material. This gives them excellent durability and resistance to water and wind damage.
  • Longevity: Mod-bit roofs typically last longer than traditional asphalt shingles.
  • Easy to install: Mod-bit roofs are easy to install, which can make them a cost-effective option for homeowners.
  • Versatility: Mod-bit roofs come in a variety of colors and styles, which can make it easy to find one that matches the aesthetic of your home.

torching mod-bit flat roof roll

Mod-bit roofs are made up of two or more layers. Also reinforcement materials such as fiberglass or polyester. Heat is used with a torch or hot asphalt. Then, mineral granules cover them. Several ways exist to install this type of roofing system, with some of the most common methods being:

  • Torch-applied: a gas-fueled torch is used to heat the asphalt and bond the layers together
  • Hot-applied: hot asphalt is applied to bond the modified with the underlayment which is fastened to the roof deck
  • Cold-applied: adhesive is used to bond the layers together with a cold layer of asphalt.
  • Self-adhered: a layer of adhesive is already applied to the back of the material and it is sticking to the roof deck as it is unrolled

modified bitumen flat roofing

Mod-bit roofing systems are durable and can resist water and wind damage for a long time. Flat roofs on commercial and industrial buildings are popular because of this. They also work great on residential installations.

How Much Does a Mod-Bit Roof Cost for a Residential Home?

 

The cost of a mod-bit for a residential home will depend on several factors. Such as the size of the roof, the materials used, the complexity of the installation, and the location of the home. On average, a mod-bit roof can cost anywhere from $6 to $9 per square foot installed, depending on the above factors.

Yet, it's worth noting that this is a rough estimate and the actual cost can vary. For a more accurate estimate, it's recommended to get quotes from at least 2 or 3 flat roofing contractors in your area. They’ll be able to provide you with a detailed estimate based on your specific needs and budget. Mod-bit roofs cost more than regular asphalt shingles.

It's worth noting that they can last longer and need less maintenance, so in the long run, mod-bit could be a cost-effective option.

Schedule an Inspection

Is a TPO Roof the Best Option for a Residential Home?

 

TPO roof being installed on a residential flat roof

TPO (Thermoplastic Olefin) roofing is a popular option for residential homes. The benefits of using TPO roofing for a residential property include:

  • Durability: TPO roofing is made of a thermoplastic material that is highly resistant to UV rays, ozone, and chemicals. Which makes it a great option for areas with intense sun exposure.
  • Energy-efficient: TPO roofing reflects the sun's rays, which can help to reduce cooling costs and keep the building cooler.
  • Waterproof: TPO roofing is heat-welded together at the seams, which creates a very strong, waterproof seal.
  • Variety of colors: TPO roofing systems are available in a variety of colors. Including white, tan, and light gray which are known to reflect the sun's rays and can help to reduce cooling costs.
  • Easy to repair: TPO roofing is easy to repair and can be welded together at the seams to fix any leaks or damage.

TPO roof on a home with a skylight

TPO (Thermoplastic Olefin) roofing is a type of single-ply roofing system that is made of a thermoplastic material. It is a type of roofing membrane that is heat-welded together at the seams, which creates a very strong, waterproof seal. This material is often used on flat and low-sloped roofs. It's particularly popular because of its durability and resistance to weathering.

roofing crew doing flat roof repairs

TPO roofing is known for its high resistance to UV rays, ozone, and chemicals, which makes it a great option for areas with intense sun exposure. It also has good resistance to punctures and tears, and it can withstand high winds and heavy rain. Additionally, TPO roofing is energy-efficient. It can help to reduce cooling costs, as it reflects the sun's rays and keeps the building cooler.

roofer welding seam on a TPO roof with a hand welder

As mentioned earlier, TPO roofing is available in a few colors. It can be installed in different ways, some of the most common methods are:

  • Fully adhered: the TPO membrane gets adhered to the insulation over the roof deck
  • Mechanically attached: the TPO membrane is attached to the roof deck using mechanical fasteners

TPO systems are known for their durability, resistance to weathering, and energy efficiency. This makes them a popular choice for flat and low-sloped roofs on residential homes. But, TPO roofing is more expensive than traditional asphalt shingles. Installation requires specialized equipment and trained professionals. 

roofing crew installing TPO on a commercial building

TPO roofing doesn't look as nice as Mod-Bit and other roofing materials. So it may not match the look of a traditional residential home. Consult a local flat roof contractor. One who is familiar with the specific weather conditions in your area and can recommend the best option for your home.

How Much Does a TPO Roof Cost for a Home?

 

The cost of a TPO roof for a residential home will depend on several factors. Such as the size of the roof, the materials used, the complexity of the installation, and the location of the home. 

On average, a TPO roof can cost anywhere from $6 to $12 per square foot installed, depending on the above factors.

Yet, it's worth noting that this is a rough estimate and the actual cost can vary. To get a better estimate, ask at least 2 or 3 local roofing contractors for quotes. They'll be able to provide you with a detailed estimate based on your specific needs and budget.

It's also important to note that TPO is a more durable and energy-efficient option. It can last longer on the right roof and needs less maintenance, so in the long run, it could be a cost-effective option.

Schedule an Inspection

Wrapping Up Your Journey Through Flat Roofing in Florida

 

This guide explains flat roofs for coastal regions, including the durability and costs of Mod-bit and TPO. We've equipped you with the knowledge you need to make an educated decision tailored to Florida's unique conditions.

At RoofCrafters, we know that picking a new roof is a big decision and can be hard. We have been in this industry for over 30 years. Our goal is to make this process as simple as we can for you. Please contact us if you need advice, estimates, or installations. We are more than roofers; we are your partners in securing a sturdy, cost-efficient roof over your head.

David Toth

My name is David Toth and I am the lead estimator in North Florida with RoofCrafters Roofing. Originally from New Brunswick, I have called Florida home for the past 47 years. I enjoy cooking along with traveling to different historical areas in Florida when I have free time.