Commercial Built Up Roofing

Commercial built-up roofing (BUR) is a type of roofing system commonly used on low-slope commercial buildings. It consists of multiple layers of bitumen (asphalt or tar) and reinforcing fabrics, which create a durable, waterproof membrane. The alternating layers provide excellent protection against weather, UV rays, and foot traffic, making BUR a long-lasting choice for commercial roofs. Its thickness and multi-layered construction help enhance insulation and energy efficiency.

Commercial Roofing New York provide expert commercial built-up roofing (BUR) services throughout New York. With extensive experience in installing and maintaining BUR systems, we ensure durable, weather-resistant roofs for businesses in the city’s demanding environment. Our team uses high-quality materials and advanced techniques to deliver long-lasting protection and energy efficiency. Whether it’s a new installation or a repair, we provide tailored solutions to meet the specific needs of commercial properties across New York.

What Is Commercial Built Up Roofing?

Commercial built-up roofing (BUR) is a layered roofing system designed for strength and water resistance, commonly found on flat or low-sloped commercial buildings. Composed of alternating layers of bitumen and reinforcing fabrics, BUR forms a sturdy barrier against water infiltration, particularly useful in areas with frequent rainfall. Each layer, called a “ply,” adds thickness and resilience, while a final layer of gravel or reflective coating is applied to protect against UV exposure. The National Roofing Contractors Association (NRCA) highlights BUR’s excellent insulation and long-term performance, with a typical lifespan of 20 to 30 years when properly maintained. Bitumen used in BUR may be asphalt, coal tar, or cold-applied adhesive, each offering distinct benefits depending on climate and building needs. The Roof Coatings Manufacturers Association notes BUR’s multi-ply structure provides strong puncture resistance, ideal for high-traffic areas on commercial roofs. With regular upkeep, BUR remains a cost-effective choice for commercial properties requiring durable, long-lasting roofing solutions.

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What Are The Elements Of Built Up Roofing Systems?

Built-up roofing (BUR) systems consist of several essential elements; a base sheet, ply sheets, bitumen and a surfacing layer. Each of these elements serves a specific purpose to create a strong, weather-resistant roof. The first layer is the base sheet, typically installed over the roof deck to provide a stable foundation and prevent movement. Following this, multiple ply sheets made of materials like fiberglass or organic felts are layered with bitumen, building thickness and adding structural reinforcement. According to the National Roofing Contractors Association, these ply sheets enhance durability and flexibility, helping prevent cracks, leaks, and other forms of damage from thermal expansion and contraction. Bitumen, often asphalt or coal tar, is applied between each ply sheet to bind the layers together, forming a waterproof barrier that withstands foot traffic and heavy loads. The final component is the surfacing layer, commonly composed of gravel, crushed stone, or a reflective coating, which shields the underlying layers from UV rays, weather, and physical impact. Together, these elements create a BUR system well-suited for commercial buildings requiring robust, low-maintenance, and long-lasting roofing solutions.

1. Base Sheet
2. Ply Sheets
3. Bitumen
4. Surfacing Layer

1. Base Sheet

The base sheet is the first layer in a built-up roofing system, installed directly over the roof deck. It provides a stable, protective foundation, preventing movement between the roof deck and the additional layers. Usually composed of fiberglass or reinforced organic materials, the base sheet enhances the roof’s stability and helps guard it against moisture and environmental factors. According to the National Roofing Contractors Association, this foundational layer is crucial for creating a durable, long-lasting roofing structure.

2. Ply Sheets

Ply sheets form the core layers of a built-up roofing system, adding thickness and resilience to the roof. These sheets, often made from fiberglass or organic felts, are layered with bitumen to bind them together. Each ply sheet increases the roof’s flexibility and its resistance to weather changes, helping prevent cracking from thermal expansion and contraction. The multiple layers of ply sheets in a BUR system act as reinforcements, providing additional protection against punctures and other forms of damage.

3. Bitumen

Bitumen is an essential component in built-up roofing, serving as the adhesive layer that binds ply sheets together. Applied between each ply sheet, bitumen creates a waterproof barrier, which is vital for withstanding heavy rain and protecting the building interior from leaks. Common types of bitumen include asphalt and coal tar, both chosen for their strong adhesion and resistance to wear. This binding material is particularly valuable in commercial roofing, where durability and waterproofing are essential for long-term performance.

4. Surfacing Layer

The surfacing layer is the topmost component of a built-up roofing system, providing necessary protection for the underlying layers. Made of materials like gravel, crushed stone, or reflective coatings, this layer shields the roof from UV radiation, weathering, and physical impact. Reflective surfacing, in particular, helps reduce heat absorption, contributing to energy efficiency by lowering cooling costs. In commercial applications, the surfacing layer adds durability and helps maintain the roof’s appearance and functionality over time.

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What Are The Benefits Of A Built Up Roofing System?

A built-up roofing (BUR) system provides robust durability and superior waterproofing, making it ideal for commercial applications. The multiple layers of a BUR system create a strong barrier against leaks, while also offering excellent insulation to help reduce energy costs. With low maintenance needs and a long lifespan, BUR minimizes repair expenses over time. The top layer, often gravel or stone, adds UV protection and fire resistance, enhancing both the safety and resilience of the roof.

1. Durability
2. Waterproofing
3. Insulation
4. Low Maintenance
5. UV and Fire Resistance

1. Durability

Built-up roofing (BUR) systems are valued for their durability due to the multiple layers of ply sheets and bitumen that form a sturdy structure. These layers provide strong resistance to severe weather, including wind, rain, and temperature extremes, making BUR ideal for challenging environments. According to the National Roofing Contractors Association, the reinforced design of BUR can withstand heavy foot traffic, making it suitable for roofs where maintenance personnel or equipment may often be present. This durability contributes to a longer lifespan, reducing the need for frequent replacements.

2. Waterproofing

One of the primary advantages of a BUR system is its waterproofing capability, as the layered construction creates a robust barrier against leaks. Bitumen serves as a powerful sealant between each ply, preventing water infiltration and protecting the interior of the building from moisture damage. This multi-layered waterproofing approach offers a dependable solution for facilities in areas with heavy rainfall or intense weather. BUR’s leak resistance helps maintain a dry and secure interior, essential for asset protection and structural stability.

3. Insulation

Built-up roofing provides excellent insulation, helping to regulate indoor temperatures and lower energy costs. The multiple layers of ply sheets and bitumen increase thermal resistance, keeping buildings cooler in summer and warmer in winter. This insulation minimizes the need for extensive heating and cooling, resulting in notable cost savings. In commercial roofing, energy efficiency is increasingly emphasized, and BUR’s insulating qualities make it a practical choice for environmentally conscious businesses.

4. Low Maintenance

A BUR system generally requires minimal upkeep compared to other roofing types, reducing long-term maintenance costs for building owners. The materials used in BUR are designed to be resilient and low-maintenance, so routine inspections and minor repairs are usually sufficient. This decreased need for maintenance is advantageous for commercial property managers seeking a dependable roof with minimal intervention. Lower maintenance requirements translate to reduced operational costs over the roof’s lifespan.

5. UV and Fire Resistance

The top surfacing layer in BUR, often composed of gravel or crushed stone, provides essential UV protection, reducing sun exposure effects and helping the roof retain its structural integrity over time. Additionally, this surface layer enhances fire resistance, adding an important layer of safety to the building. According to industry standards, the combination of UV and fire resistance makes BUR particularly suitable for commercial properties where both safety and durability are priorities. This added protection boosts the roof’s performance and reliability across various environmental conditions.

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When Is A Built Up Roof A Good Choice For Commercial And Industrial Buildings?

A built-up roofing (BUR) system is an excellent choice for commercial and industrial buildings when durability, waterproofing, and resistance to heavy foot traffic are priorities. Its multi-layer design offers strong protection against harsh weather, making it ideal for buildings in climates with high rainfall or temperature extremes. BUR also provides good insulation, which helps regulate indoor temperatures and reduces energy costs, making it a cost-effective option for businesses focused on energy efficiency. Additionally, the gravel or stone surfacing on a BUR system enhances UV protection and fire resistance, adding extra safety features that are especially valuable in industrial settings.

1. When Durability is Required
2. For Effective Waterproofing
3. To Support Heavy Foot Traffic
4. For Improved Insulation
5. When UV and Fire Resistance are Priorities

1. When Durability is Required

A built-up roofing (BUR) system is highly durable, making it a strong choice for commercial and industrial buildings exposed to harsh environmental conditions. Its multiple layers of ply sheets and bitumen create a resilient structure that resists wear from wind, rain, and other severe weather. The National Roofing Contractors Association notes that BUR systems are particularly effective in areas with variable climates, providing long-lasting performance and reducing the need for frequent repairs. This durability ensures a reliable roof structure for many years.

2. For Effective Waterproofing

Built-up roofing offers excellent waterproofing, which is essential for facilities in regions with heavy rainfall or moisture exposure. The layered construction, reinforced by bitumen between each ply, creates a tight seal that prevents water infiltration and protects the building interior. According to industry sources, BUR systems are among the most effective at preventing leaks, helping maintain a dry and secure environment. This superior waterproofing is especially valuable for buildings storing sensitive materials or equipment.

3. To Support Heavy Foot Traffic

Built-up roofing is designed to handle heavy foot traffic, making it suitable for buildings where maintenance personnel frequently access the roof. The multiple layers provide additional strength, allowing the roof to support equipment and withstand regular use without easily sustaining damage. For industrial facilities with rooftop machinery or frequent inspections, this durability against foot traffic reduces wear and ensures long-term performance, lowering the need for repairs.

4. For Improved Insulation

BUR systems offer effective insulation, helping regulate indoor temperatures by minimizing heat transfer through the roof. The thick, layered structure retains heat in winter and helps keep interiors cool in summer, reducing strain on HVAC systems. This added insulation can result in substantial energy savings over time, which is a major advantage for energy-conscious businesses. In commercial and industrial settings, this efficiency can help reduce operating costs and improve occupant comfort.

5. When UV and Fire Resistance are Priorities

Built-up roofing systems offer enhanced protection against UV rays and fire, thanks to the top surfacing layer made of gravel, crushed stone, or reflective materials. This surfacing shields the roof from harmful solar exposure, which extends the lifespan of the roofing materials. Additionally, the surface layer provides extra fire resistance, which is particularly valuable for safety-conscious commercial and industrial facilities. These properties make BUR systems a secure choice where UV exposure and fire safety are critical considerations.

How Long Do Built Up Roof Systems Last?

A built-up roofing (BUR) system typically lasts between 20 to 30 years, depending on the quality of installation, materials used, and regular maintenance. BUR provides reliable waterproofing and insulation, which helps maintain its longevity under various weather conditions. Proper upkeep, particularly of the top surfacing layer, can further extend the roof’s lifespan by protecting it from UV exposure and physical wear. In commercial settings, consistent inspections and minor repairs help ensure the BUR system reaches its maximum service life.

How Much Does A Built Up Roof System Cost?

A built-up roofing (BUR) system generally costs between $7.50 and $9.50 per square foot. For a 1,500-square-foot roof, this means the total installation cost would range from approximately $11,250 to $14,250. Costs can vary based on factors like location and project complexity, so consulting with a local roofing contractor is recommended for a precise estimate.

Disclaimer: The prices listed in this table are general estimates and can vary based on factors such as roof size, material type, and specific building needs. For precise costs, it is recommended to consult with professional commercial roofing contractors, as they can provide tailored quotes and insights based on the unique requirements of each project. Prices may also vary depending on location, accessibility, and market conditions.

What Is The Difference Between Built Up Roofing and Modified Bitumen Roofing?

Built-up roofing (BUR) and modified bitumen roofing are two common types of commercial roofing systems, each with distinct benefits and applications. Built-up roofing consists of multiple layers of ply sheets and bitumen, providing a sturdy, waterproof barrier that resists harsh weather and heavy foot traffic. In contrast, modified bitumen roofing systems incorporate modified asphalt reinforced with synthetic materials like fiberglass or polyester, making them more flexible and suitable for extreme temperature fluctuations. According to the National Roofing Contractors Association, modified bitumen roofing is often favored for its ease of installation and adaptability to diverse climates, while BUR is valued for its durability and low maintenance. Both systems offer strong waterproofing, but modified bitumen’s flexibility makes it ideal for buildings exposed to rapid temperature changes or structural movement.

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