What Are the Pros and Cons of Modified Bitumen Commercial Roofing?

modified bitumen-commercial-roofing

Have you ever heard of modified bitumen roofing? When it comes to the roofing of a commercial structure, a number of factors have to be considered. These may include material and labor costs, the desired energy profile of the roofing, the angle or slope, usability of the rooftop space, and so on. You can choose from a variety of materials for your commercial roofing in Woodstock, Georgia. Every material comes with its own set of pros and cons.

One of the increasingly popular roofing materials used for flat-roofed commercial buildings is modified bitumen. This is a type of membrane roofing that belongs to the same class as thermoplastic membrane roofing and synthetic rubber. However, modified bitumen has its own advantages and disadvantages. Before we take a look at these, it is important to know exactly what modified bitumen roofing is.

What is Modified Bitumen Roofing?

Modified Bitumen roofing, or MB roofing, makes use of asphalt as basic material. It is typically applied on top of an existing roof or a roof deck. The MB roofing system itself comprises five layers.

The bottom layer comprises insulation which helps regulate the thermal resistance and temperature of the roof system. On top of it, the modified base sheets are installed. The third layer is that of fabricate sheet membrane with fiberglass or polyester reinforcement.

A layer of the adhesive is then applied to make sure that the layers underneath are waterproof. Finally, a surfacing layer is added at the very top. This layer comes with weather-resistant properties to ensure the durability of the roofing.

Pros of Modified Bitumen Roofing

Seamless Installation: One of the best things about modified bitumen roofing is that it has a completely seamless installation. Different methods of adhesion are used to join the sheets so that no connections are left behind. This is particularly effective in ensuring that the roofing has no leaks.

Multiple Adhesion Options: A number of adhesive methods and techniques can be used during the installation of modified bitumen roofing. These include heat-based adhesion, cold adhesion, as well a self-adhesion. You can choose a type of adhesion method that is best suited to your situation. For instance, the heat-based method is not suitable for buildings with heat-sensitive equipment on the rooftop.

Flexible Roofing: Bitumen roofing is incredibly flexible. This results in several advantages. The inherent flexibility of the roofing means that it can withstand the cold weather quite well without suffering any damage due to contraction. Bitumen is also tear-resistant so that it can handle other stress elements such as foot traffic without any tears.

Improved Energy Efficiency: Once the multiple layers of bitumen roofing have been installed on a rooftop, they are very effective in warding off the heat. This is because the UV-resistant surfacing and the heat-reflective properties of the top layer prevent the roofing from absorbing the heat. As a result, it is easier to maintain indoor cooling during the summers with improved energy efficiency.

Recyclable: A significant percentage of bitumen roofing can be recycled once it reaches the end of its lifespan. This makes it an environment-friendly choice.

Cons of Modified Bitumen Roofing

Along with its vast range of benefits, MB roofing also has its downsides. These include:

Low Lifespan: Compared to many other roofing materials, MB roofing has a shorter lifespan. A typical MB roofing installation will last around 10 to 20 years. This is in contrast to many other roofing materials which can last upwards of 30 years, some having a lifespan of even 50 years and more.

Water Pooling: Bitumen roofing itself is completely waterproof as noted above. While this is an obvious advantage, it can also turn into a disadvantage. For instance, excessive rains can cause water to gather and pool up on the roofing. If the water is not drained quickly and thoroughly, it can expose the layers of the roofing to damage and quick wear-and-tear.

Hiring a Reliable Roofing Company in Woodstock, Georgia

If you want to have new commercial roofing installed, or an existing roof modified, replaced, or repaired in Woodstock, GA, we have got you covered. Here at Sentinel Exteriors, we offer a comprehensive range of commercial roofing services. We work with roofs of all types, sizes, and slopes. Our experts also advise you on the choice of roofing materials, roof angle, and other aspects of a commercial roof. Get in touch with us today for free estimates, expert advice, and general guidance on commercial roofing.


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