Modified Bitumen Roof VS TPO: Which One to Choose

Since commercial flat roofing system is a huge investment, choosing between modified bitumen and TPO roofing, which are two of the most popular roofing systems, can be challenging. That said, if you know in what aspects these two differ and how they perform in different weather conditions, you are halfway there to choosing the right one.

Modified bitumen came into the picture in the 1970s when issues with traditional asphalt roofs needed to be addressed. Since then, it has impressively fulfilled most expectations and had been a preferred choice for most contractors and building owners.

On the other hand, thermoplastic polyolefin (TPO) roofing is relatively new and has been around since the 1990s. Today, TPO has attracted enormous attention as it’s considered better than any other commercial flat roofing systems. Like modified bitumen, it’s also ideal for both bitterly cold and extremely hot weather. Now that they both perform well, selecting a suitable one is a problem of different scale, which you might have been facing.

To help you make the best decision when choosing a flat roofing system, we thought of throwing some light on modified bitumen and TPO roofing, and where they stand today. Let’s look at each of them:

Modified bitumen flat roofs

Originally the upgrade to regular asphalt roofs, modified bitumen roofing system ruled the industry for almost two decades due to its low cost, better lifespan, and enhanced flexibility. Since it’s an upgrade, substances like atactic polypropylene (APP) or styrene butadiene styrene (SBS) were added to the previous version, intended to resist UV damage, blistering, cracking, and oxidation.

However, many contractors no longer offer modified bitumen installation due to some recently discovered disadvantages. First, many roofing contractors scrimp on the addition of modifiers like APP or SBS, which causes the roof to underperform. Second, the gravel spread on the roof for UV and hail protection makes it difficult to detect cracks and leaks. These two issues alone resulted in the downfall of the modified bitumen roofing system and led to the popularity of the next best thing – Thermoplastic polyolefin (TPO) roofing.

Thermoplastic polyolefin (TPO) flat roofs

Also known as flexible thermoplastic polyolefin (FTPO) roofing, a TPO roof can be installed in three ways: ballasted, fully adhered, and mechanically fastened. It’s so far considered the best roofing system because of its numerous benefits.

Offering UV protection, TPO is tough and tear-resistant, and also resists oil and chemical spills. But what makes it ideal is the ‘green’ quality since no plasticizers are used during its formation. Furthermore, you have the option of choosing from different colors, including energy-efficient white. This simply means that you can match your roof’s color with the building’s color scheme to enhance its exterior. These benefits along with low-maintenance, easy repairing and others have made TPO roofing system the best one today. To ensure that your commercial roof gives you the best returns, installing TPO roof can be an excellent decision.

Let us help you

Regardless of which roofing system you choose, we can help you install it at a very competitive price. We are the best roofing company in Austin that has been providing quality service and value to the roofing industry since 2009. For our excellent services, we have been awarded by the Versico Company, making us one of the Certified Versico Gold Medal Quality Program Roofing Contractor in the area. Make sure you get in touch with our experts today and let them help you.

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