The main types of commercial low-slope roofs used in Florida are BUR (Built-Up Roofing), Modified Bitumen, TPO, PVC, and standing-seam metal systems (used on low-slope roofs, not flat roofs).
Each system has its strengths and the appropriate choice depends on your building’s location, use, and long-term maintenance strategy.
This guide will help you compare the most common options and make an informed, confident decision for your next project.
|
Roof Type |
General Characteristics |
Reflectivity (Varies by Product/Color) |
Wind & Weather Performance |
Maintenance Level |
|
TPO |
Lightweight, heat-welded seams |
High for white CRRC-rated products |
System Dependent Low |
Low |
|
PVC |
Chemical-resistant, heat-welded |
High for white CRRC-rated products |
System Dependent Low |
Low |
|
Modified Bitumen |
Multi-ply asphalt-based membrane |
Varies by surfacing |
System Dependent Moderate |
Moderate |
|
BUR (Built-Up) |
Multi-ply asphalt/felt system |
Varies by surfacing |
System Dependent Moderate |
Moderate |
|
Metal |
Long-service life materials |
High for light/reflective finishes |
Engineered Wind Resistance Required |
Low |
Best for: Maximum durability and long-term performance.
Built-Up Roofing often called “tar and gravel” — has been used for more than a century. It consists of multiple layers of bitumen and reinforcing felts, topped with gravel or a reflective coating for UV protection.
Advantages:
Considerations:
Best for: A durable multi-ply option suitable for heat exposure when properly specified.
Modified Bitumen systems use asphalt enhanced with polymers for strength and flexibility.
They’re typically installed as rolled membranes, either torch-applied, hot-mopped, or self-adhered.
Advantages:
Considerations:
Proper installation is critical; seam adhesion and torch technique determine long-term watertight performance.
Two-ply SBS systems generally offer increased redundancy compared to single-ply sheets, consistent with NRCA guidance.
Best for: Energy efficiency and fast installation.
Single-ply membranes are lightweight, factory-manufactured sheets of synthetic material that create a clean, continuous barrier. They’re the most common commercial flat roofing systems in the U.S. today.
Best for: Long-service-life option for low-slope roofs with engineered wind design.
Standing-seam metal roofs feature interlocking panels that direct water away from the roof surface. Wind uplift performance depends on engineering to ASCE-7 design pressures and the use of approved fastening systems.
Advantages:
Considerations:
Selecting the best commercial flat roof starts with a few key questions:
Total lifecycle cost depends on design, installation, environment, and maintenance.
Even the best roof system depends on care and consistency. Preventive maintenance can double the life of your roof and reduce emergency repair costs.
A professional maintenance plan should include:
These steps protect your investment, keep warranties active, and prevent small issues from turning into expensive repairs.
Understanding the types of commercial flat roofs is just the first step. The real value comes from choosing a partner who can look beyond materials and think strategically about your entire roofing asset — from design to long-term performance.
A qualified roofing expert doesn’t just install a system; they assess your property’s unique conditions, including:
At Best Roofing, we’ve spent more than 46 years helping Florida property managers, building owners, and community associations make smart, data-driven roofing decisions. From new installations and reroofs to preventive maintenance programs and capital budget forecasting, our goal is simple: to keep your buildings dry, compliant, and operational year-round.
Ready to get a clear, professional assessment of your roof’s condition and needs?
Schedule a comprehensive roof inspection or request a proposal today to see exactly what your property needs: no surprises, no sales pressure, just clear recommendations from a trusted commercial roofing partner.