Six Options for Commercial Roofing Systems

Whether your commercial building is an airport terminal, a shopping mall, or a condo complex – it is your job to ensure that the property remains safe and structurally sound. Commercial roofing systems are essential for protecting buildings from the elements, and selecting the right type can significantly impact durability, energy efficiency, and maintenance costs. This article will provide a brief review and overview of various commercial roofing systems that you may have at your property.

1. Built-Up Roofing (BUR): Built-Up Roofing, often referred to as BUR, consists of multiple layers of asphalt and reinforcing fabrics. It’s one of the oldest roofing systems, characterized by its durability and reliability. It’s structure typically includes a base sheet, one or more layers of felt (usually fiberglass or polyester), and a final layer of asphalt or tar. It is then covered with a layer of gravel or a reflective coating for UV protection.The advantages of a BUR roofing system include a long lifespan (20-30 years), excellent waterproofing properties, good fire resistance, and low maintenance requirements.

   Disadvantages include the heavy material and the possibility of additional structural support. Installation can be labor-intensive and time-consuming, and the roofing system generally has a higher initial cost.

2. Modified Bitumen Roofing: This asphalt roofing solution features added modifiers to improve its performance. It is commonly used for low-slope commercial roofs and combines the benefits of BUR with the flexibility of modern materials. These materials typically consist of a single layer of modified asphalt with a reinforcing fabric. It can be installed with heat (torch-down), cold adhesives, or self-adhering systems.

   This type of system has advantages, including being more quickly and easily installed compared to BUR. Modified bitumen features food flexibility and resistance to cracking, allowing it to perform well in extreme temperatures. There are some disadvantages, however. Bitumen has a shorter lifespan than BUR and limited UV resistance compared to some other systems.

3. Single-Ply Roofing: This system involves a single layer of synthetic material that is either adhered, mechanically attached, or ballasted. It’s known for its ease of installation and effective waterproofing capabilities. There are several types of single-ply roofing, including:

   EPDM (Ethylene Propylene Diene Monomer): A highly durable and weather-resistant rubber roofing.
   TPO (Thermoplastic Olefin): A type of plastic roofing that is energy-efficient and resistant to UV rays and chemicals.
   PVC (Polyvinyl Chloride): A plastic-based roofing known for its strong resistance to chemicals and fire.

   The advantages of single-ply roofing include its lightweight and flexibility, good energy efficiency due to reflective properties, and minimal installation and maintenance. Its disadvantages include its vulnerability to punctures, tears, and seams that can fail if not properly sealed.

4. Metal Roofing: This commercial roofing system is made from metal panels, often aluminum, steel, or copper. It’s known for its durability and modern aesthetic. Variations include:
   
   Standing Seam: Features vertical panels with raised seams that are interlocked.
   R-Panel: Has a ribbed design with lower profiles, providing structural strength.

   Metal roofing has advantages, including a long lifespan (40-70 years), resistance to severe weather and fire, energy efficiency, and minimal maintenance requirements. Metal commercial roofing systems are also recyclable. The disadvantages associated with metal roofing include a higher upfront cost, noise levels during heavy rain or hail, and the potential for denting from impacts.

5. Green Roofing: Living green roofs involves planting vegetation on the roof surface. This system integrates plants with a waterproof membrane, drainage layer, and growing medium.

   Advantages of these systems include their excellent insulation properties and reduced heating and cooling costs.
   The roof’s life is extended as the living ecosystem protects the underlying materials from UV rays, enhancing aesthetics and promoting biodiversity.  Green roofing has disadvantages, including a high initial installation cost and higher maintenance costs associated with irrigation and upkeep. Due to weight and structural considerations, these commercial roofing systems are not suitable for all building types.

6. Cool Roofing: This roofing system is designed to reflect more sunlight and absorb less heat than standard roofing. It can be applied as a coating over existing roofs or integral to the roofing system. These solutions may include reflective coatings or specialized materials that reduce heat absorption.

   Advantages of cool roofing include reduced cooling costs due to lower roof temperatures and an extended lifespan. However, the effectiveness of cool roofing can vary based on climate and roof design.

No matter the type of roof you choose, call Unicoat Roofing to learn more about how our roof coating solutions can maximize and protect your investment.