Commercial built-up roofing (BUR) is a durable and cost-effective roofing system commonly used for flat or low-slope roofs on commercial buildings. With a long history, built-up roofing has been a staple in the commercial roofing industry for over a century. Known for its reliability and strength, BUR is composed of multiple layers that work together to create a waterproof barrier, protecting buildings from weather and external elements. Call for experts in commercial built up roofing in Elkhart, IN on (574) 536-2823. A-1 Commercial Roofing Solutions will have a team for you.
Understanding Commercial Built-Up Roofing
Structure and Composition
The most defining characteristic of built-up roofing is its multi-layered design. Typically, BUR systems consist of three main components: a base sheet, interply (or reinforcing) layers, and a protective top layer. The base sheet serves as the foundation, adhered directly to the roof deck. The interply layers, which are made from bitumen (asphalt, coal tar, or modified bitumen), are sandwiched between the base sheet and the top layer. These layers provide additional strength and flexibility to the system. Finally, the top layer, often made from gravel, stone, or reflective coatings, protects the roof from UV radiation and physical damage.
Installation Process
The installation of BUR involves several steps to ensure the roof is durable and waterproof. First, the roofing contractor prepares the roof deck by cleaning it and applying a base sheet. Next, layers of bitumen are heated and applied over the base sheet, followed by the placement of additional fabric reinforcement layers. These layers are repeated until the desired number of layers is achieved. The system is then finished off with a final protective layer, which may consist of gravel, mineral granules, or a reflective coating that can enhance the building’s energy efficiency by reflecting sunlight.
Advantages of Built-Up Roofing
One of the primary advantages of BUR is its exceptional durability. The multiple layers of bitumen and reinforcing fabric offer superior resistance to harsh weather conditions such as rain, snow, and high winds. Additionally, the material is resistant to UV degradation, ensuring a longer lifespan compared to some other roofing systems. BUR is also highly customizable in terms of its thickness, making it suitable for different climate conditions and building types.
Another significant advantage of BUR is its minimal maintenance requirements. Once installed, a built-up roof can last anywhere from 20 to 40 years with minimal upkeep. The gravel or stone layer at the top not only protects the roof from physical damage but also prevents water ponding, which can lead to leaks and roof degradation.
BUR Disadvantages
While BUR is known for its strength, it does come with some drawbacks. The installation process can be labor-intensive and time-consuming, potentially increasing upfront costs. Additionally, built-up roofs can be heavy, which may require extra structural support. The application of hot bitumen during installation can also create a hazardous working environment, requiring safety precautions.
Commercial Built-Up Roofing
Commercial built-up roofing remains a popular choice for flat and low-slope roofs due to its durability, longevity, and minimal maintenance. Although it may involve higher initial investment and installation complexity, the long-term benefits make it an excellent option for commercial building owners looking for a reliable roofing solution. Contact A-1 Commercial Roofing Solutions for commercial built up roofing in Elkhart, IN on (574) 536-2823.
FAQ
What is Built-Up Roofing (BUR)?
It consists of multiple layers of bitumen (asphalt, coal tar, or modified bitumen) and reinforcing fabric, topped with a protective layer like gravel, stone, or reflective coatings.
How long does a built-up roof last?
A built-up roof typically lasts between 20 and 40 years, depending on factors such as the quality of installation, maintenance, and environmental conditions. Regular maintenance can help extend its lifespan.
What are the benefits of a built-up roofing system?
Built-up roofing is known for its durability, water resistance, and ability to withstand extreme weather conditions. It offers long-term protection from UV degradation, reduces energy costs when reflective coatings are used, and requires minimal maintenance once installed.
Is built-up roofing energy-efficient?
Yes, BUR can be energy-efficient, especially if a reflective coating or gravel layer is applied. These materials reflect sunlight, which helps reduce heat absorption and lower cooling costs for the building.
How is commercial built up roofing installed?
The installation process involves applying a base sheet to the roof deck, followed by layers of hot bitumen and fabric reinforcement. These layers are repeated to the desired thickness, with a final protective layer of gravel or reflective coating.