TPO Vs EPDM Membrane Roof – Which One’s Better

On May 4, 2022, Posted by , In Uncategorized, With No Comments

In this post, we will discuss two of the most popular and proven single-ply membranes used for waterproofing – TPO and EPDM. They are generally used on roofs of commercial and residential buildings. While TPO is made out of a  thermal plastic membrane. While an EPDM roof is a rubber membrane put together in the same fashion as a TPO membrane.

EPDM was a popular choice back in the day  and has been around for nearly 60 years. Today, we are seeing more and more people adopting the TPO technology as a replacement for EPDM roofs. It is a relatively advanced material that has now been around for 20+ years. Also, TPO makes up almost 60% of the market share when EPDM used to be that 60%.


Your overall membrane roof budget can vary depending on the single-ply membrane you choose and the scope of your work. There are a lot of variables that can affect the pricing part of your project. For example, if you decide to remove the existing roof altogether, that might cost you more than if you were just looking to lay waterproof cover boards on certain parts of your roof.

Temperature Consistency

With the TPO system, you will have a white membrane reflective of the sun. On the other hand, an EPDM roof will have a dark membrane that will absorb that heat. So if you’re looking to build a roof with some temperature consistency, we recommend that you waterproof your roof with a TPO system.


During the single-ply membrane roof installation, each of your sheets will overlap three to four inches onto the sheet placed next to them. The overlap with the EPDM roof is the same as with TPO sheets. With TPO, it’s hot-air welded together where a machine runs down the seam and heats the membrane that adheres to the surface chemically.

Durability & Warranty

The typical lifespan of a single-ply membrane roof depends upon a couple of variables, out of which the most considerable one is the thickness of the membrane. A 45mm membrane roof will last enough and typically gets you a 10-year to 15-year warranty, depending upon the brand and grade of your choice.

If you choose to move up to a 60mm membrane, you will be able to get a 15 to 20-year warranty. And finally, there’s the 90mm, which will be your higher-end membrane and will fetch you a 25-30 year warranty.


Suppose you’re redoing your damaged roof or building a new property or a whole new extension to your existing property. In that case, you must protect those structures with a waterproof roof. What’s also important is that you hire experienced professionals to finish the job for you.

So if you’re looking for roof specialists who do membrane roofing in Auckland, visit our website or give us a call to get an initial assessment and quote. At Dako Waterproofing, we offer you the best waterproofing services with the latest tech and techniques to ensure quality and durability.

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