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Mod bit roofing, as we call it in our industry, is easy to be confused with built up roofing. This is because these types of roofs are also made of asphalt-based materials. However, these types of roofs are more suitable for low-slope and flat roofs. It has five different layers that offer you protection; hence, it is one of the most common choices.

The first iteration of the modified bitumen roof was first invented in Europe in the mid 20th century. This type of roofing includes bitumen, which is improved with polymers, and also strengthened with fiberglass. It is then put together in a combination such that the roof’s physical properties are elevated, so much that there are only a few other materials that match them.


There are a lot of advantages of having modified roofing. One of the significant benefits of having a mod bit roofing is the uninterrupted connection between their layers. It doesn’t matter what kind of adhesive they are assembled with. They always have a smooth, continuous connection between the layers of sheets; this reduces the chance for cracks. The biggest concern about flat roofs usually is their tendency to developing leaks easily. The modified bitumen roof systems are generally able to bypass this drawback because of the many layers they possess. These roofs are also inherently resistant to UV radiations and heat because of their unique installation and manufacturing processes compared to a regular bitumen roof. This directly affects your energy consumption since less heat entering the building means less cooling required.

environment-friendly mod bit roofing

These roofs also have the inherent nature of being tear-resistant because of their manufacturing processes and the sheer number of layers they have, while bitumen roofing only has three layers. Although these roof systems are robust, it doesn’t mean that you will have to compromise on looks. The top layer of a modified bitumen roof can usually be customized to match your existing shingles as well.

Modified bitumen is environment-friendly since most of the materials used can easily be recycled without ending up being useless in a dumpster. This further helps you to reduce your own carbon footprint, if you care about that stuff. A modified bitumen roofing is also very easy to install and repair, for they, basically, come in rolled sheets like a carpet.


Although there are so many advantages to the modified bitumen roof systems, we feel a moral responsibility to let you know about these roofs’ downsides. The lifespan of these systems is less (around 10 to 15 years) compared to a non modified bitumen. This means that you might have to get your roof replaced quicker than you would think. Moreover, while dealing with these roofs, compared to a bitumen roof, it is important to have proper drainage systems in place. Otherwise, these could quickly develop cracks and leaks, costing you some precious bucks to get them repaired every time this happens!

You should also know that while installing a modified bitumen roofing, the materials are heated to very high temperatures using blowtorch, which activates the release of harmful fumes along with a foul odor which could become dangerous on contact. However, the fumes are released very quickly, so they don’t stay in the building for long.