Built-up roofing (BUR) systems have been a staple of commercial roofing for over a century—and for good reason. Known for their multi-layer durability and exceptional weather resistance, BUR systems are especially well-suited for flat or low-slope roofs. In Grapevine, TX, where intense sun exposure and sudden storms are common, businesses looking for long-term protection often turn to BUR. At KangaRoof, we specialize in commercial roofing solutions that match our clients’ structural needs and regional climate demands.
What Is Built-Up Roofing?
A built-up roof consists of alternating layers of bitumen (asphalt or coal tar) and reinforcing fabrics, topped with a layer of gravel or a reflective coating. This configuration creates a thick, water-resistant membrane that offers redundancy in protection—a critical feature for buildings with wide roof spans and minimal pitch.
There are typically three to five layers in a BUR system, but this number can be adjusted based on performance goals and budget. The top layer, or surfacing, helps protect the underlying layers from UV damage and foot traffic.
Key Advantages of BUR Systems
1. Proven Longevity
One of the biggest benefits of built-up roofing is its long service life. When installed correctly and maintained properly, BUR systems can last 20–30 years or more. Their layered design helps prevent leaks, cracks, and thermal stress.
2. Excellent Waterproofing
With multiple layers of waterproof material, BUR systems provide a reliable barrier against water intrusion. This makes them ideal for flat roofs where water drainage can be more challenging.
3. UV and Fire Resistance
BUR systems are often topped with a layer of gravel or mineral cap sheets that help reflect UV rays and provide fire resistance. This surfacing layer protects the bitumen and extends the life of the system.
4. Low Maintenance
Although regular inspections are important, BUR systems tend to require fewer repairs than other commercial roof types. When issues do arise, the redundant layering makes spot repairs straightforward and effective.
How BUR Compares to Other Systems
When comparing BUR with other commercial roofing options like TPO, PVC, or modified bitumen, several distinctions emerge:
- BUR vs. Single-Ply (TPO/PVC): BUR offers multi-layer protection, while single-ply systems rely on a single membrane. BUR is heavier and may require stronger structural support.
- BUR vs. Modified Bitumen: Both are asphalt-based, but BUR uses multiple layers applied hot, while modified bitumen typically involves fewer layers and may be torch-applied.
BUR systems remain a preferred option for property owners prioritizing time-tested performance over speed of installation.
Installation Process Overview
BUR installation involves several key steps:
- Deck Preparation: Removing debris and inspecting the substrate for structural integrity
- Base Sheet Application: The first layer provides a strong foundation
- Hot Asphalt or Cold Adhesive Application: Used to bond subsequent layers of felt or fiberglass
- Surfacing: Finishing the system with gravel, a mineral cap sheet, or a reflective coating
The process is labor-intensive and requires trained professionals to ensure each layer is applied evenly and securely.
Environmental and Energy Considerations
Some BUR systems can be customized with reflective coatings to improve solar reflectivity and reduce heat absorption. While not as energy-efficient as white TPO or PVC roofs by default, modern BUR options with cool roof coatings can qualify for energy incentives and help lower cooling costs.
Why Work with Certified Roofing Experts?
Choosing an experienced contractor is crucial when dealing with hot-applied roofing systems. KangaRoof is an OC Preferred and Emerald Premium Contractor, meaning we meet strict guidelines for safety, quality, and ongoing training. Our teams understand the unique requirements of Grapevine’s climate and tailor solutions for long-term durability and energy performance.
Maintenance for Built-Up Roofs
While BUR systems are low-maintenance, they still benefit from regular inspections, especially after severe weather. Key maintenance tasks include:
- Checking for gravel displacement
- Inspecting flashings and penetrations
- Verifying drainage performance
- Identifying early signs of blistering or cracks
Preventive maintenance helps protect your investment and ensures the system performs for decades.
Final Thoughts
Built-up roofing remains one of the most reliable and time-proven commercial roofing systems available today. In Grapevine, TX, where weather extremes demand robust performance, KangaRoof delivers expertly installed BUR systems that stand the test of time. For commercial property owners looking for a combination of durability, weather resistance, and value, BUR continues to be a smart investment.
Read also our blog: Trusted Experts for Commercial Roof Repairs