Flat Roof

How Long Do Flat Roofs Last?

Flat roofs have been used for decades on commercial buildings and are becoming more popular for residential homes. Most people love the clean lines of flat roofs but wonder about their durability and longevity. In this article, we will take a closer look at flat roofs and discuss how long they last.

First, it’s essential to understand that not all flat roofs are identical. Their lifespan depends on many factors, including the materials used, the owner’s maintenance practices, and the climate where the home is located.

How long do flat roofs last?

Flat roofs typically last 15 to 30 years before needing to be replaced. That’s a fairly wide range, so let’s examine the factors that affect their longevity.

Roof Material

The most popular flat roofing materials are listed below:

• Built-Up Roofing (BUR): BUR roofs are comprised of multiple layers of asphalt and specialized fabric. With proper maintenance, BUR roofs can last up to 30 years.

• PVC / TPO: PVC roofs are made of polyvinyl chloride, while TPO roofs are made of thermoplastic polyolefin. These roofs are very durable and typically last 20-30 years.

• EPDM: EPDM roofs are made of ethylene propylene diene monomer, a synthetic form of rubber. These roofs are especially resistant to damage from UV rays. Like PVC / TPO roofs, EPDM roofs commonly last 20-30 years.

• Modified Bitumen: Made of a specialized type of Bitumen, these roofs are quite common and typically last 15-25 years.

• Metal: Metal flat roofs are popular amongst homeowners due to their superior durability. With proper maintenance, these roofs last 30 years or more.

Installation Quality

Proper roof installation is essential for any roof to perform up to its full potential. Roof installation requires years of training and experience to master.


All roofs require regular maintenance. It is a good practice to schedule a professional roof inspection every year and after any significant storm. These inspections will identify potential problems and provide the opportunity to make repairs before larger problems occur.


Flat roofs are affected by a number of environmental factors, including UV rays, snow/ice, high winds, hurricanes/storms, and extreme heat and cold. Each of these climate-related factors will alter the expected lifespan of a roof. That’s why it’s critical to pick a roofing material suited to your local climate and conditions.

CMR has the experience you need

CMR has successfully installed hundreds of flat roofs in Florida and all across the country. Our roofing experts have experience using all roofing materials and can build a flat roof that will last for decades. Contact us today to get started planning your new roof.