What Is a Built-Up Roof? A Comprehensive Guide to BUR Roofing in Flower Mound, TX

Lancaster Roofing Blog
April 30, 2025
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What is Built-Up Roofing (BUR)?

Built-up roofing (BUR) is a time-tested, multi-layered roofing system designed primarily for flat or low-slope commercial roofs. Commonly referred to as built-up roofs, BUR systems have been in use for over a century, particularly on commercial and industrial buildings. The installation process involves alternating layers of bitumen and reinforcing ply sheets, finished with a top layer of aggregate or another protective surface. This composition forms a highly durable and weather-resistant barrier, making BUR an ideal choice for business owners in Flower Mound, Texas.


One of the primary advantages of built-up roofing is its exceptional resistance to UV exposure and environmental wear, due to its layered construction and surface protection. These systems are designed for long-term performance with minimal ongoing maintenance, although regular inspections remain important to maximize the roof’s lifespan. For commercial facilities, BUR offers a dependable blend of strength and longevity, which is why many property owners and facility managers continue to rely on it. Furthermore, built-up roofing systems provide flexibility in materials, allowing customization to accommodate specific structural needs and local climate considerations.


In Flower Mound, TX, where commercial buildings must withstand varying weather conditions, built-up roofing continues to be a standout solution for reliable protection and long-term value. When installed and maintained by professionals such as Lancaster Roofing & Construction, these systems retain their performance and help safeguard property investments for years to come. Whether for new developments or as a replacement for aging roofs, BUR remains a trusted option for commercial roofing, offering an excellent combination of durability, cost-effectiveness, and proven results.

The Components of a Built-Up Roofing System

A built-up roofing (BUR) system is a multi-layered solution specifically designed for flat or low-slope roofs. Widely implemented across commercial properties, this system is engineered to deliver outstanding durability and protection against the elements. Built-up roofing is constructed using reinforced membrane layers—typically felts or fabrics—alternated with layers of bitumen or tar. This structured layering creates a watertight barrier that safeguards against leaks and water intrusion. The integration of tar and reinforcing fabrics enhances resistance to moisture, making it a highly effective roofing option for flat-roof installations in Flower Mound, Texas.


Another critical component of a BUR system is insulation. Advanced insulation materials play a key role in regulating indoor temperature, which contributes to improved energy efficiency and occupant comfort. To boost thermal performance, insulation boards are often incorporated into the system. The topmost layer typically consists of a protective surface, such as gravel or a reflective coating. These finishes not only provide added waterproofing but also defend against UV rays and environmental exposure.


Built-up roofing continues to be a preferred solution for commercial buildings because of its long-standing reliability and strong performance. Each layer contributes to the overall resilience of the roof, resulting in a highly durable structure. By gaining a clear understanding of the components of a BUR system, commercial property owners in Flower Mound, TX can make more informed decisions and recognize the long-term advantages of this proven and cost-efficient roofing method. For expert installation and service, Lancaster Roofing & Construction remains a trusted name in the local roofing industry.

The Built-Up Roof Installation Process

The installation of a built-up roofing (BUR) system demands a high level of precision and expertise to guarantee optimal long-term performance. The process initiates with meticulous surface preparation, encompassing thorough cleaning and inspection to establish a solid foundation. Following this, multiple layers of asphalt and reinforcing felts are systematically applied. The incorporation of these alternating layers is essential for enhancing both the structural integrity and waterproofing capabilities of the roof. Experienced contractors ensure that each layer is installed without gaps, thereby bolstering the roof’s overall durability.


As the installation advances, additional ply sheets and bitumen are incorporated to further reinforce the roof's resilience. This systematic methodology sets BUR apart from other roofing systems. The use of specialized tools and the expertise of seasoned professionals are critical to ensuring that each step is executed precisely. The final layer provides significant resistance to moisture and adverse weather conditions, making the roof suitable for long-term application. Regular inspections throughout the installation process play a crucial role in identifying and addressing potential issues proactively. Ultimately, all seams and edges are meticulously sealed to minimize the risk of future leaks or damage.


A comprehensive understanding of the BUR installation process underscores its status as a preferred roofing solution for commercial buildings in Flower Mound, TX. The combination of expert design and skilled craftsmanship results in a long-lasting, high-performance roofing system.

Maintenance and Repair of BUR

Ongoing maintenance and timely repair are essential to preserving the performance and longevity of any BUR system. Regular inspections should be an integral part of your building’s maintenance strategy, enabling early detection of wear or emerging issues. Common maintenance practices include removing debris, checking for standing water, and evaluating the condition of surface coatings and flashings. Consistent care helps reduce the likelihood of major repairs and contributes to the long-term durability of the roofing system.


When repairs are required, the extent may range from minor patchwork to more comprehensive restoration, depending on the nature and severity of the damage. Small issues such as surface cracks or localized wear are typically resolved quickly, while more extensive problems demand professional expertise. Partnering with a certified commercial roofing contractor in Flower Mound, Texas, such as Lancaster Roofing & Construction, ensures repairs are handled efficiently and in accordance with best practices. Flashings, in particular, require close inspection, as they play a critical role in preventing water intrusion at seams and roof penetrations.



A proactive approach to roof maintenance can help avoid costly disruptions and unexpected damage. Early signs of deterioration—such as blistering or membrane splits—should be addressed without delay. By implementing a planned maintenance schedule, property owners can significantly reduce emergency repair needs while maximizing the service life and performance of their built-up roofing system.

Comparing BUR to Other Roofing Options

When evaluating roofing options for commercial properties, built-up roofing (BUR) systems consistently stand out for their durability and long-term performance. Compared to alternatives such as PVC roofing, BUR systems offer superior protection due to their multi-layered composition. These layers enhance resistance to impact and severe weather conditions, whereas PVC roofing—although lightweight and reflective—often requires reinforcement to match the structural integrity of a BUR system.


Waterproofing is another critical area where built-up roofing systems offer significant advantages. The layered construction of BUR creates a durable and effective moisture barrier, reducing the likelihood of leaks. Conversely, PVC roofing may require additional waterproofing elements or enhancements to deliver comparable protection.


Cost efficiency is also an important consideration. BUR systems, constructed from bitumen and reinforcing fabrics, typically offer a more affordable solution than PVC alternatives, which use advanced polymer materials. This makes BUR a practical and cost-effective choice for large-scale commercial projects. Some BUR systems also incorporate reflective surface coatings that help lower heat absorption, improving building energy efficiency and indoor climate control.



While both systems offer specific benefits, the reliability, cost-effectiveness, and superior waterproofing capabilities of built-up roofing systems make them a compelling choice—especially for commercial buildings in Flower Mound, TX. For professional guidance and expert installation, Lancaster Roofing & Construction is a trusted partner in delivering high-performance roofing solutions.

Conclusion

Built-up roofing (BUR) provides outstanding durability, reliable waterproofing, and excellent fire resistance, making it a trusted solution for commercial and industrial structures. By understanding the key components, installation procedures, and maintenance requirements, property owners in Flower Mound, Texas can make well-informed decisions about their roofing investments. Whether you're planning a new build or in need of expert commercial roof repair, the experienced professionals at Lancaster Roofing & Construction are ready to assist you at every stage. Securing the long-term performance of your roof starts with the right system—and BUR remains one of the most dependable options available today.

  • Q: What is Built-Up Roofing (BUR)?

    A: Built-Up Roofing (BUR) is a highly durable, multi-layered roofing system widely used for flat or low-slope commercial and industrial roofs. It consists of alternating layers of bitumen (asphalt or coal tar) and reinforcing fabrics such as fiberglass or organic felt, finished with a protective surface coating or aggregate. This layered configuration creates a robust, waterproof barrier that delivers long-lasting performance and dependable resistance to the elements. BUR systems are valued for their reliability, longevity, and minimal maintenance requirements.

  • Q: What are the benefits of Built-Up Roofing?

    A: Built-Up Roofing offers several advantages for property owners in Flower Mound, Texas. These include excellent resistance to UV rays, strong wind, and extreme weather conditions. The multi-layered construction improves waterproofing and enhances structural durability, making it a preferred option for commercial buildings. Additionally, BUR systems are low-maintenance and can be tailored to meet specific environmental demands and building needs.

  • Q: How is Built-Up Roofing installed?

    A: Installing a BUR system starts with detailed surface preparation to ensure a clean, solid foundation. Certified roofing specialists apply multiple layers of hot asphalt or bitumen along with reinforcing felts in a systematic process. Each layer is securely bonded to improve waterproofing and long-term strength. The surface is typically completed with gravel, mineral cap sheets, or reflective coatings for added protection. Careful attention to detail during installation is essential to maximize durability and minimize future maintenance.

  • Q: What maintenance is required for Built-Up Roofing?

    A: Though Built-Up Roofing systems are designed for durability, routine maintenance is vital to maintaining optimal performance. Regular inspections can detect early issues such as blistering, cracking, or standing water. Maintenance typically includes debris removal, flashing checks, and prompt minor repairs. By scheduling periodic evaluations with professional contractors in Flower Mound, TX, property owners can extend the system’s life and prevent costly damage.

  • Q: How does Built-Up Roofing compare to other roofing systems?

    A: Built-Up Roofing is often preferred over alternatives like PVC roofing because of its superior waterproofing, impact resistance, and cost-efficiency. The multiple layers in a BUR system create a durable defense that surpasses the moisture resistance of single-ply systems. While PVC roofing is known for its reflectivity and lightweight properties, it may require enhancements to match the protection offered by BUR. Additionally, BUR materials such as bitumen are typically more affordable, making it a practical and budget-conscious choice for large commercial projects in Flower Mound, Texas.

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