Understanding the Differences Between Modified Bitumen Roofing and Built-Up Roofing
When it comes to commercial roofing systems, two of the most popular options are modified bitumen roofing and built-up roofing (BUR). Both of these systems have been used for decades, and each has its own unique advantages and disadvantages. In this article, we’ll take a closer look at the differences between modified bitumen roofing and built-up roofing to help you make an informed decision for your next commercial roofing project.
Modified bitumen roofing is a type of asphalt-based roofing material that is commonly used on commercial buildings. It consists of sheets of modified bitumen that are attached to the roof using heat or adhesives. Modified bitumen roofing is known for its durability, as well as its ability to withstand extreme temperatures and weather conditions.
One of the main advantages of modified bitumen roofing is its ease of installation. It can be installed quickly and efficiently, which makes it a popular choice for commercial roofing contractors. Additionally, modified bitumen roofing is relatively low-maintenance and can last up to 20 years with proper care and maintenance.
Built-up roofing (BUR) is another popular commercial roofing option that has been around for more than a century. BUR systems consist of alternating layers of asphalt or coal tar, and roofing felts or ply sheets. These layers are then topped with a layer of gravel or other material to protect the roof from weathering and other damage.
One of the main advantages of built-up roofing is its ability to withstand heavy foot traffic and other forms of wear and tear. This makes it a popular choice for buildings that have rooftop equipment or frequent foot traffic. Additionally, built-up roofing is known for its excellent waterproofing capabilities, which makes it a good choice for buildings in areas with heavy rainfall or other moisture-related issues.
Differences between Modified Bitumen Roofing and Built-Up Roofing
While both modified bitumen roofing and built-up roofing are popular commercial roofing options, there are several key differences between the two. Here are some of the main differences to consider:
Installation: Modified bitumen roofing is generally easier and quicker to install than built-up roofing. It can often be installed in a single layer, which can save time and money on installation costs.
Maintenance: Both modified bitumen roofing and built-up roofing require regular maintenance to ensure their longevity. However, modified bitumen roofing is generally considered to be lower maintenance than built-up roofing, which requires more frequent inspections and repairs.
Durability: Both modified bitumen roofing and built-up roofing are known for their durability, but they have different strengths. Modified bitumen roofing is known for its resistance to extreme temperatures and weather conditions, while built-up roofing is known for its ability to withstand heavy foot traffic and other forms of wear and tear.
Cost: The cost of modified bitumen roofing and built-up roofing can vary depending on a variety of factors, including the size of the roof, the complexity of the installation, and the materials used. Generally speaking, modified bitumen roofing is considered to be a more cost-effective option than built-up roofing.
Lifespan: Both modified bitumen roofing and built-up roofing can last for decades with proper care and maintenance. However, modified bitumen roofing typically has a slightly shorter lifespan than built-up roofing, with an average lifespan of 20 years compared to 25–30 years for built-up roofing.
Both modified bitumen roofing and built-up roofing are popular commercial roofing options, each with its own unique advantages and disadvantages. When choosing between the two, it’s important to consider factors like installation, maintenance, durability, cost, and lifespan. Consulting with a professional roofing contractor can help you make an informed decision for your next commercial roofing project.