What Roofing Material is Best for a Flat Roof?

The material that will be used to create your flat roof requires important consideration. Because it is so critical, it is important to be certain that you are making the best decision possible. In order to accomplish this, you must first determine the best roofing option. Despite the fact that there are numerous types, four options stand out.

Let’s take a look at these four flat roofing options:

1. EPDM membrane roofing

This is a type of roofing membrane that is made of a rubberized polyethylene membrane. Ethylene propylene diene terpolymer, also known as EPDM (ethylene propylene diene terpolymer), is a black synthesized rubber membrane that is used mostly in commercial and medical facilities. While EPDM is primarily used in commercial roofing, it also has a use in residential roofing.

Because of the heat it will absorb as a result of the black material, we would not recommend using it over a bedroom or living room. EPDM, on the other hand, is an excellent choice for a flat roof over a garage or other non-living space that can be seen through a window because the black membrane will not become as dirty as a white membrane.

EPDM is extremely durable, and it is essentially equivalent to having a bulletproof rubber roof system installed on your home. Because of this durability, you can expect a fully adhered 0.060 thickness EPDM flat roof to last between 25 and 30 years.

2. TPO membrane roofing (thermoplastic polyolefin).

It is a white single-ply membrane made of thermoplastic polyolefin that is used in both commercial and residential roofing applications. Instead of absorbing heat as EPDM does, the white membrane of TPO reflects it back to the surface.

The use of TPO roofing on flat roofs or low-slope dormers over bedrooms is a great choice because it helps to keep the room cooler in hotter climates. You still have the option to choose it over a non-living space flooring option such as EPDM rubber.

However, keep in mind that if you have a window that looks over the membrane, a white membrane will become dirtier much more quickly than a black membrane. Despite the fact that TPO membrane flat roofs are not as long-lasting as EPDM, they can still last for up to 25 years if installed properly.

3. PVC Membrane Roofing

Single-ply white membranes made of polyvinyl chloride (PVC) are also used in commercial and residential roofing applications. When it comes to any flat or low slope over a living space or bedroom, PVC is an excellent choice.

Aside from the fact that they are both white membranes, PVC and TPO are very similar in terms of their characteristics, with the exception of their chemical composition. Even the installation procedure is largely the same as it was previously.

The only significant difference between PVC and TPO is that PVC is slightly more flexible and has been in use for a longer period of time. When installed properly, a PVC flat roof can last for up to 25 years, which is comparable to the lifespan of a TPO roof.

4. Standing seam metal roof

A standing seam metal roof system is made up of a series of metal panels that are either mechanically or mechanically joined together at the seams. When the metal panels go through thermal expansion, this allows the panels to expand and contract without being restricted.

A standing seam metal roof is an excellent roofing material for a flat roof because of its strength and durability. It will have a better aesthetic because of the color options available, and it will last longer than membrane roof systems.

As long as your standing seam metal flat roof is properly installed and your attic is properly ventilated, there’s no reason why you shouldn’t expect it to last at least 30 years. The lifespan of a standing seam metal flat roof could be as long as 50 years under ideal conditions. But the increased longevity and aesthetics come at a cost, and it will be more expensive than all three types of roofing membranes.


Which flat roof material is the best choice for your situation? We would recommend a membrane roof system if you’re looking for a cost effective solution. Remember to take into consideration the space beneath the roof. Depending on whether it is a living room or a bedroom, I would recommend PVC or TPO.

A standing seam metal roof is a great option if you have the money to spend and want your roof to last longer. You’ll also have the option of selecting the color of the Kynar 500 painted finish that you want.

All four types are excellent choices. It works best to go with a material that matches both your financial and aesthetic desire.

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