What Is Commercial Roofing
Commercial roofing refers to installing and maintaining roofing systems on commercial buildings, such as warehouses, offices, retail stores, and other large structures. Unlike residential roofing, commercial roofing often involves different materials, techniques, and structural considerations due to the size and purpose of the buildings involved.
Here are some critical aspects of commercial roofing:
Types of Commercial Roofing Systems
Built-Up Roofing (BUR)
Built-up roofing (BUR) is one of the oldest and most reliable roofing systems used in commercial buildings. It has been a staple in the industry for over a century and is known for its durability, excellent waterproofing capabilities, and long-lasting performance.
This roofing method is favored for flat or low-slope roofs commonly found on commercial structures.
Composition and Structure
The BUR system is aptly named due to its composition of multiple layers that are built to create a finished roofing membrane. The primary components of a BUR system include bitumen (coal tar or asphalt) and reinforcing fabrics. Here’s a breakdown of its structure:
The process begins with a base layer, often a high-quality insulation board, which provides thermal resistance and creates a stable surface for the subsequent layers. Layers of bitumen are applied between each reinforcing fabric layer. The bitumen can be used hot, cold, or torch-applied. Hot-applied bitumen is heated to liquid before application, while cold-applied bitumen is spread at ambient temperatures.
These fabrics, typically fiberglass or polyester, are embedded in the bitumen. The fabrics provide strength and stability, enhancing the overall durability of the roof. The final layer is often a protective surfacing material such as gravel, mineral granules, or a reflective coating. This surface layer shields the underlying bitumen and fabrics from UV radiation, weathering, and physical damage.
Durability and Performance
One of BUR’s standout features is its exceptional durability. The multiple layers of reinforcing fabrics and bitumen create a robust and resilient roofing system capable of withstanding heavy foot traffic, harsh weather conditions, and impacts. It is ideal for commercial buildings where the roof might be subject to additional stress and usage.
Another significant advantage of BUR is its excellent waterproofing properties. The continuous, multi-layer construction creates a watertight barrier that prevents water infiltration. It is crucial for flat or low-slope roofs, where water drainage can be challenging, and leaks are a common concern. BUR systems are known for their long lifespan, often lasting 20 to 30 years or more with proper maintenance.
Energy Efficiency
Built-up roofing systems can contribute to a building’s energy efficiency. Adding insulation boards in the base layer helps reduce heat transfer, keeping the building warmer in winter and cooler in summer. Additionally, the reflective surfacing materials used in the top layer can reduce heat absorption, lowering cooling costs during hot weather.
Maintenance and Repairs
Maintaining a BUR system is relatively straightforward, but regular inspections are essential to ensure its longevity. Any damage or wear and tear should be addressed promptly to prevent minor issues from developing into significant problems. Periodic inspections and maintenance can help identify potential issues such as blisters, cracks, or punctures in the roofing membrane. Repairs typically involve patching or reapplying bitumen and reinforcing fabrics to damaged areas, which is a relatively simple and cost-effective process.
Environmental Considerations
BUR systems are also valued for their environmental benefits. The materials used in BUR are often recyclable, reducing the overall environmental impact. Furthermore, the long lifespan of BUR systems means less frequent replacements and reduced waste. Reflective surfacing materials can contribute to energy savings, which positively impacts the environment by lowering the building’s overall energy consumption.
Conclusion
Built-up roofing (BUR) is famous for commercial buildings due to its proven durability, excellent waterproofing capabilities, and long-term performance. The multi-layer construction of bitumen and reinforcing fabrics provides a robust and reliable roofing system that can withstand harsh conditions and heavy usage. With proper maintenance, a BUR system can offer decades of protection, making it a cost-effective and environmentally friendly option for commercial roofing. Whether for a roof replacement or a new construction project, BUR is a time-tested solution that continues to meet the demands of modern commercial buildings.
Modified Bitumen Roofing
Modified bitumen roofing is famous for commercial buildings due to its durability, flexibility, and weather resistance. It is an evolution of the traditional built-up roofing (BUR) system but incorporates modern materials to enhance its performance and longevity. This type of roofing is particularly well-suited for flat or low-slope roofs, which are common in commercial structures.
Composition and Structure
Modified bitumen roofing systems are composed of multiple layers, similar to BUR systems, but the key difference lies in polymer-modified bitumen. This bitumen is a mixture of asphalt with various polymers, typically styrene-butadiene-styrene (SBS) or atactic polypropylene (APP). These polymers enhance the bitumen’s flexibility and strength, allowing it to perform better under various environmental conditions.
The base layer of a modified bitumen roofing system typically consists of a reinforced fabric, such as fiberglass or polyester. This fabric provides structural stability and strength to the roofing system.
The modified bitumen is then applied over the base layer. The SBS-modified bitumen is known for its rubber-like qualities, providing excellent flexibility and elasticity. It makes it highly resistant to cracking and splitting, even in extreme temperatures. On the other hand, APP-modified bitumen has a plastic-like quality, offering superior resistance to UV rays and high temperatures.
The roofing system can be installed using various methods, including heat welding, cold adhesive, or self-adhered membranes. Each method has advantages and can be chosen based on specific project requirements and environmental conditions.
Advantages of Modified Bitumen Roofing
Modified bitumen roofing offers several advantages, making it a preferred choice for many commercial applications.
Flexibility
One of the primary benefits is its enhanced flexibility. The polymer modifications in the bitumen allow the roofing system to expand and contract more with temperature changes, reducing the risk of cracks and leaks. This flexibility is essential for roofs subjected to significant temperature fluctuations or structural movement.
Durability
Another significant advantage of modified bitumen roofing is its durability. Polymer-modified bitumen is more resistant to physical wear and tear than traditional asphalt. Its increased durability translates into a longer lifespan for the roofing system, often ranging from 15 to 20 years or more, with proper maintenance.
Weather Resistance
Modified bitumen roofing also offers excellent weather resistance. The system is designed to withstand extreme weather conditions, including heavy rain, high winds, and intense UV radiation. The SBS-modified bitumen provides superior resistance to cold temperatures and potential cracking, while APP-modified bitumen excels in resisting heat and UV degradation.
Low Maintenance
In addition to its physical properties, modified bitumen roofing systems are generally low maintenance. Regular inspections and minor repairs are usually sufficient to keep the system in good condition. This low maintenance requirement can lead to cost savings regarding the roof’s life.
Installation and Maintenance
Experienced professionals should install modified bitumen roofing to ensure proper application and performance. The process involves laying down the base layer, applying the modified bitumen, and securing the system using the chosen method—heat welding, cold adhesive, or self-adhered membranes. Each method requires specific techniques and equipment for a seamless, durable bond.
Once installed, modified bitumen roofing systems benefit from regular inspections and maintenance. While the system is designed to be low-maintenance, periodic checks can help identify and address potential issues before they become more significant problems. Maintaining the roofing system’s integrity is crucial for extending its lifespan and ensuring its effectiveness.
Modified bitumen roofing is a versatile and reliable choice for commercial buildings. It offers enhanced flexibility, durability, and weather resistance compared to traditional roofing systems. Its advanced composition and installation methods contribute to its long-term performance and low-maintenance characteristics, making it a valuable investment for many commercial properties.
Single-Ply Roofing
Single-ply roofing systems are famous for commercial buildings due to their lightweight nature, energy efficiency, and ease of installation. These roofing solutions include Thermoplastic Olefin (TPO), Polyvinyl Chloride (PVC), and Ethylene Propylene Diene Monomer (EPDM). Each material offers distinct advantages, making them suitable for various applications and climates. Here’s an in-depth look at these single-ply roofing options.
Thermoplastic Olefin (TPO)
Thermoplastic Olefin (TPO) is a single-ply roofing membrane that combines polypropylene and ethylene rubber. It is known for its reflective properties and energy efficiency. TPO roofing is designed to reflect UV rays and reduce heat absorption, which helps lower cooling costs for commercial buildings. This reflective quality also contributes to a cooler indoor environment, enhancing occupant comfort.
One critical benefit of TPO roofing is its durability. It resists various weather conditions, including high winds and heavy rain. TPO membranes also resist punctures, tears, and impact damage, making them ideal for roofs that may experience foot traffic or occasional maintenance work.
TPO roofing systems are installed using mechanical fasteners or adhered with special adhesives, which allows for a secure and seamless application. The material’s flexibility ensures it can accommodate building movement and structural settling without compromising its integrity. TPO is also relatively easy to repair, as damaged sections can be patched or welded to restore the roof’s performance.
Polyvinyl Chloride (PVC)
Polyvinyl Chloride (PVC) is another popular single-ply roofing material known for its exceptional resistance to chemical exposure, fire, and water. PVC roofing is particularly suitable for buildings that handle hazardous materials or have high moisture levels. Its resistance to chemicals makes it an excellent choice for manufacturing facilities, warehouses, and other industrial applications.
PVC membranes have a long and highly durable lifespan, often exceeding 20 years with proper maintenance. The material is UV-resistant, which helps prevent degradation and maintains the roof’s performance over time. PVC roofing systems are available in various colors and thicknesses, allowing for customization based on specific building needs and aesthetic preferences.
The installation of PVC roofing typically involves heat welding seams to create a watertight bond. This method ensures that the roof is free from seams or overlaps that could potentially leak. Additionally, PVC roofs are relatively low maintenance, requiring only periodic inspections and cleaning to ensure longevity.
Ethylene Propylene Diene Monomer (EPDM)
Ethylene Propylene Diene Monomer (EPDM) is a single-ply roofing material used in the industry for decades. EPDM is a synthetic rubber known for its outstanding weather resistance, flexibility, and longevity. It can withstand extreme temperatures, from scorching heat to cold, making it a versatile choice for various climates.
EPDM roofing systems are available in both black and white membranes. The black EPDM option absorbs heat, which can be beneficial in colder climates where additional warmth is desired. On the other hand, white EPDM reflects sunlight and helps in reducing cooling costs in warmer climates. This versatility allows building owners to choose the best option based on their specific climate and energy needs.
EPDM is installed by fully adhering it to the roof substrate, mechanically attaching it, or ballasting it with gravel or pavers. The material’s inherent flexibility allows it to accommodate building movement and settling without compromising performance. EPDM roofing systems are also relatively easy to repair, with patches and adhesives available to address any damage that may occur.
Advantages of Single-Ply Roofing Systems
Lightweight
Single-ply roofing materials are generally lighter than traditional multi-layer systems, which can reduce the load on the building’s structure and simplify installation.
Energy Efficiency
Many single-ply roofing options, particularly TPO and PVC, offer excellent reflective properties that help reduce cooling costs and improve energy efficiency.
Ease of Installation
Straightly installation of single-ply membranes can lead to faster project completion and reduced labor costs.
Durability and Longevity
Single-ply roofing materials are designed to withstand harsh weather conditions and provide long-lasting performance with minimal maintenance.
Overall, single-ply roofing systems offer durability, energy efficiency, and ease of installation, making them a popular choice for commercial buildings. Whether choosing TPO, PVC, or EPDM, building owners can benefit from each material’s advantages, ensuring a reliable and effective roofing solution. If you want to know more, contact us at Brown Roofing and get the best roofing for your commercial project!
