Designing for performance beyond the membrane

By The Coffee Shops™.  

Contractors can improve long-term roof performance by focusing on the entire roofing assembly rather than any single component. 

In a recent episode of Roofing Road Trips®, Megan Ellsworth sat down with David French of Versico to discuss what makes a roofing system truly durable. While membranes often receive the most attention, David emphasized that long-term performance depends on a much broader perspective. 

According to David, contractors and designers should begin by understanding what matters most to the building owner or stakeholder. “It's just really important to understand, whoever the decision maker is, what's important to them. Is it wind resistance, energy efficiency, puncture resistance, long-term durability or sustainability?” David said. Because every project has different priorities, product selection should be guided by those objectives rather than a one-size-fits-all approach. 

That system includes insulation, cover boards, fasteners, adhesives, air and vapor barriers, edge metals and installation methods. Each element contributes to how the roof performs throughout its service life. 

One area that deserves particular attention is the metal edge. David noted, “I think the number is somewhere around 70% of all roofing failures or wind generated failures on a roofing system start at the metal edge.” He later clarified that catastrophic failures are especially likely to originate there, making edge performance a critical design consideration. 

Because of that reality, David highlighted the importance of ensuring edge systems are incorporated into the overall protection strategy. He explained that warranty coverage should extend to those components, not just the membrane and insulation, because edge failure can have significant consequences during severe weather events. 

Ultimately, selecting a high-performing roof system means looking at every component of the roof and understanding how they work together. From the membrane to the perimeter, thoughtful design decisions help create assemblies that can better withstand decades of service. 

As contractors evaluate product options and performance requirements, the conversation naturally extends beyond design considerations to the role installation quality and innovation play in achieving those long-term goals. 

Listen to the full podcast or Watch the recording to learn more about high-performing roofing system design.