Flat Roofs, Big Impact: A Complete Guide for Commercial Properties
- enviroglobe
- Aug 2
- 4 min read
Updated: Aug 5
Commercial flat roofing systems are a popular choice for many commercial property owners and facility managers due to their practicality, cost-effectiveness, and versatility. Understanding the various types of flat roofing systems, their benefits, and maintenance requirements is crucial for making an informed decision. This guide aims to educate commercial property owners about the essentials of commercial flat roofing systems.
Understanding Commercial Flat Roofing Systems
Commercial flat roofing systems are designed to provide a level surface for buildings, primarily those with low-slope roofs. Unlike pitched roofs, flat roofs have a slight slope to allow for water drainage, making them suitable for various climates and building designs. These systems are typically made from a variety of materials. Below are some of the common materials used.
EPDM (Ethylene Propylene Diene Monomer)
TPO (Thermoplastic Olefin)
Modified Bitumen
Built-Up Roofing (BUR)
PVC Roofing Membrane
Types of Commercial Flat Roofing Systems
Each type of flat roofing system has unique characteristics, advantages, and disadvantages. Below is a breakdown of the most common types of commercial flat roofing systems.
EPDM Roofing: EPDM is a synthetic rubber membrane widely used in roofing due to its strength and UV resistance. Its lightweight nature allows for easy installation and upkeep.
TPO Roofing: TPO is a single-layer roofing material known for its energy efficiency and ability to reflect sunlight, helping to lower cooling expenses. Its installation is straightforward, and it is resistant to punctures and tears.
Modified Bitumen: This system consists of asphalt-based materials that are reinforced with fiberglass or polyester. Modified bitumen is known for its flexibility and durability, making it an excellent choice for areas with extreme weather conditions.
Built-Up Roofing (BUR): BUR is a traditional roofing system made of multiple layers of asphalt and felt. It stands out for its long lifespan and superior resistance to water infiltration.
PVC Roofing Membrane: PVC is a durable, single-ply roofing membrane known for its resistance to chemicals, fire, and water. Heat-welded seams create a strong, watertight seal. Its reflective surface improves energy efficiency.
Benefits of Commercial Flat Roofing Systems
Choosing a flat roofing system for your commercial property comes with numerous benefits.
Cost-Effectiveness: Flat roofs are generally less expensive to install and maintain than sloped roofs. Their design allows for efficient use of space.
Space Utilization: Flat roofs can be utilized for additional purposes, such as rooftop gardens, HVAC units, or solar panels.
Ease of Maintenance: The flat surface allows for easier access for inspections and repairs, reducing maintenance costs over time.
Energy Efficiency: Many flat roofing materials are designed to reflect sunlight, helping to keep buildings cooler and reducing energy costs.
How Much Does a Flat Roof Cost for a Commercial Building?
The cost of installing a flat roof on a commercial property can vary widely depending on factors such as the roofing material, size of the building, labour, the time of the year, and complexity of the installation. EPDM and TPO tend to be more budget-friendly, while metal and PVC systems may come at a higher price point due to their durability and performance.
To get an accurate estimate tailored to your property, it’s best to consult with a professional roofing contractor.
Common Challenges and Solutions
While commercial flat roofing systems offer many advantages, they also come with some challenges. Below are some of the disadvantages.
Water Drainage: Improper design can lead to water pooling on flat roofs. Ensure your roofing system includes adequate drainage solutions, such as scuppers and drains, to prevent water pooling.
Punctures and Tears: Certain materials, like TPO and EPDM, can be susceptible to punctures. To preserve the roof’s condition, it is important to conduct routine inspections and address any issues promptly.
Temperature Fluctuations: Significant temperature fluctuations can cause roofing materials to expand and contract, which may result in cracking over time. Choosing high-quality materials and proper installation techniques can mitigate these issues.
Maintenance Tips for Commercial Flat Roofing Systems
Consistent upkeep is key to extending the lifespan of your flat roofing system. Here are some tips:
Conduct regular inspections, at least twice a year, to check for signs of damage.
Clear debris, leaves, and snow from the roof to prevent water pooling.
Ensure that all drainage systems are functioning correctly.
Schedule professional maintenance and repairs as needed.
Flat Roofing That Works: Long-Term Value Through Informed Choices
At Grand Valley Roofing & Coatings Inc., we specialize in high-quality commercial flat roofing solutions tailored to your building’s needs. Whether you’re considering EPDM, TPO, PVC, or metal roofing, our team offers expert consultations to help you choose the best system for long-term value and performance.
We’re proud to hold an A+ rating with the Better Business Bureau, are fully bonded and insured, and actively participate in WSIB’s Health and Safety Excellence Program—ensuring safety, reliability, and peace of mind for every project.
Ready to get started? Contact us today to schedule your consultation and discover how our flat roofing services can protect and enhance your commercial property.
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