What Is Built Up Roof? (5 Benefits For Your Property)

In the world of commercial roofing, Built-Up Roofing (BUR) systems have long been a staple. Known for their durability and reliability, BUR systems are commonly found atop both small and large structures. But what exactly is a BUR roof, and why might it be the right choice for your building?

This blog post will explore everything from:

• The basics of a built up roof
• Its pros and cons
• Costs
• Maintenance needs
• Longevity

We’re here to provide you with the knowledge to make informed decisions about your roofing needs.

What is Built-Up Roofing (BUR)?

Built-Up Roofing, often abbreviated as BUR, is a roofing system made up of multiple layers of bitumen and reinforcing fabrics, creating a durable and waterproof membrane. Traditionally, these systems have been used on flat or low-slope roofs and are constructed by alternating layers of bitumen (asphalt or coal tar) with reinforcing materials such as fiberglass or felt.

Important Components of BUR

• Bitumen: The binding agent in BUR systems, usually asphalt or coal tar, which provides waterproofing and adhesion.
• Reinforcing Fabric: Layers of felt or fiberglass that provide strength, flexibility, and a secondary barrier against water penetration.
• Surfacing Material: A final layer that often consists of gravel, a mineral cap, or liquid-applied coatings to protect against UV radiation and weathering.

The Installation Process

BUR installation involves layering bitumen with reinforcing fabrics, applying heat, and rolling out the fabric to ensure adhesion. This process is repeated until the desired thickness is achieved. The number of layers can vary based on the building’s needs and budget, typically ranging from three to five layers.

Pros and Cons of BUR Roofing

Every roofing system has its strengths and weaknesses, and BUR is no exception. Understanding these can help building managers determine whether BUR is the most suitable choice for their specific needs.

5 Pros of BUR Roofing

1. Durability: BUR systems are known for their robustness, providing excellent resistance to heavy foot traffic and mechanical damage.
2. Waterproofing: Multiple layers create a strong barrier against water infiltration, reducing the risk of leaks.
3. UV Resistance: The surfacing layer protects the roof from UV radiation, minimizing heat absorption and reducing energy costs.
4. Fire Resistance: BUR systems generally offer superior fire resistance compared to other flat roofing options, especially if using coal tar.
5. Proven Track Record: With over a century of successful use, BUR systems have a well-documented history of performance and reliability.

Cons of BUR Roofing

1. Installation Complexity: The installation process is labor-intensive and requires skilled professionals, potentially leading to higher upfront costs.
2. Weight: BUR systems are heavy due to multiple layers of material, requiring a structurally sound roof deck.
3. Fumes and Odors: The application of hot bitumen can produce unpleasant odors and fumes, which may require additional safety measures.
4. Limited Aesthetic Options: BUR systems typically lack the aesthetic variety offered by some modern roofing materials.

Cost of BUR Roofing

The cost of a BUR system can vary significantly based on factors such as the number of layers, type of bitumen used, and regional labor rates. On average, building managers can expect to pay between $3.50 and $7.00 per square foot. While this may seem higher than some alternatives, the longevity and durability often justify the investment.

Factors Influencing Cost:

• Material Quality: High-quality bitumen and reinforcing fabrics can increase costs but also improve performance and lifespan.
• Roof Size and Complexity: Larger, more complex roofs require more materials and labor, driving up costs.
• Local Labor Rates: Geographic location can significantly impact labor costs.
• Additional Features: Installing insulation, reflective coatings, or additional surfacing materials can enhance performance but add to the overall expense.

Maintenance Requirements for BUR Roofing

Regular maintenance is crucial to extending the life of any roofing system, and BUR is no exception. While BUR systems are generally low-maintenance, neglect can lead to costly repairs or premature failure. Here are some essential maintenance practices:

🔎 Routine Inspections

Conduct visual inspections at least twice a year, ideally in spring and fall, to identify any signs of damage, such as cracks, blisters, or loose gravel.

🧹 Cleaning

Remove debris, leaves, and dirt from the roof surface and drainage systems to prevent water pooling and ensure effective drainage.

🏚️ Addressing Damage

Promptly repair any damaged areas to prevent water infiltration and further deterioration. Small cracks or blisters can often be patched using compatible materials.

🩹 Sealing Joints and Flashings

Regularly inspect and reseal joints, flashings, and seams to maintain waterproofing integrity.

👷🏼‍♂️ Professional Assessments

Schedule periodic assessments by roofing professionals to evaluate the system’s condition and address potential issues.

How Long Does a BUR Roof Last?

One of the significant advantages of BUR systems is their impressive lifespan. With proper installation and maintenance, a BUR roof can last between 15 and 30 years, or even longer in some cases. Factors that influence lifespan include:

• Quality of Materials: Higher-quality materials can extend the roof’s lifespan.
• Installation: Proper installation by experienced professionals is crucial for maximizing longevity.
• Climate: Harsh weather conditions, such as excessive heat or heavy snowfall, can affect the roof’s durability.
• Maintenance: Regular maintenance and timely repairs can prevent minor issues from becoming significant problems.

Your Experts In Commercial Roofing Systems

For building managers seeking a reliable, durable, and proven flat roofing solution, Built-Up Roofing (BUR) remains an excellent option. While it may require a higher initial investment and skilled installation, the long-term benefits often outweigh the costs. With proper care, a BUR roof can provide decades of dependable service, enhancing the value and performance of your building.If you’re considering a BUR roof for your property, consult with McCormick Renovations to evaluate your specific needs and ensure a successful installation. By understanding the intricacies of BUR systems, you can make informed decisions that contribute to the longevity and efficiency of your building’s roofing infrastructure.