Ballasted Roofing Systems for Commercial Projects
A ballasted roofing system is a durable and cost-effective option designed to provide long-lasting protection against the elements while minimizing the need for additional fasteners and adhesives. This type of roofing is particularly popular for flat or low-sloped roofs and offers significant advantages in both installation and maintenance.
Benefits
Cost-Effective Installation
Ballasted systems require fewer materials and labor compared to fully adhered or mechanically fastened systems, making them an affordable option for commercial properties.
Wind Resistance
The ballast acts as a weight to secure the roofing membrane, reducing the risk of wind uplift; however, in high-wind zones, additional design considerations, such as edge securement or heavier ballast, may be required to prevent displacement.
What is Ballasted Roofing?
Ballasted roofing is a method of securing a roofing membrane using heavy materials such as gravel, stone, or concrete pavers. These ballast materials are placed on top of the roofing membrane to hold it in place, eliminating the need for mechanical fasteners or adhesives. This creates a highly efficient and secure roofing system that can withstand harsh weather conditions, high winds, and UV exposure.
Benefits of Ballasted Roofing Systems
Energy Efficiency
- Ballasted systems can contribute to energy efficiency when paired with reflective or insulated membranes. While standard ballast material, like gravel, does not inherently provide reflectivity, choosing a white TPO, PVC, or EPDM membrane with a reflective coating can enhance thermal performance and reduce cooling costs.
Low Maintenance
- With no mechanical fasteners or adhesives, ballasted roofing systems have fewer potential failure points. However, periodic inspections are recommended to ensure ballast remains evenly distributed and the membrane stays in place, preventing potential wear or displacement over time.
Environmental Impact
- The use of gravel, stone, or pavers in ballasted systems can be a sustainable choice. These materials are recyclable and can be reused in future roofing projects.
Applications of Ballasted Roofing
Commercial Buildings
- Ballasted roofing systems are ideal for large commercial buildings, including office buildings, warehouses, retail centers, and industrial facilities.
Green Roofs
- Ballasted systems can be combined with green roofing applications, allowing for the installation of a living roof that adds environmental and aesthetic value. However, the additional weight of vegetation and growing media must be considered during structural design to ensure proper load-bearing capacity.
Low-Slope Roofs
- Ballasted roofing is best suited for flat or low-slope roofs, making it a perfect solution for buildings with these types of architectural features.
