No. ANSI/SPRI ES-1 does not apply to every roofing system, but it does apply to the edge securement components used on many low-slope commercial roofing systems. While ES-1 is an edge performance standard rather than a roofing material standard, it plays a critical role in protecting commercial roofs from wind damage, particularly in hurricane-prone regions like Florida.
Understanding where ES-1 applies helps building owners, property managers, architects, and contractors ensure their roofing systems meet applicable building code requirements and provide reliable long-term performance.
What Is ES-1?
ANSI/SPRI ES-1 is the industry standard that establishes minimum performance requirements for roof edge systems. Rather than testing roofing membranes such as TPO, PVC, EPDM, or modified bitumen, ES-1 evaluates how well roof edge components resist wind uplift forces.
The standard covers products including:
- Metal edge flashings
- Gravel stops
- Coping systems
- Fascia systems
- Perimeter edge securement assemblies
These components are often the first parts of a roof exposed to high winds. If an edge system fails, wind can lift the roofing membrane, resulting in extensive roof damage and water intrusion.
Does ES-1 Cover Every Roofing System?
No. ES-1 is not specific to one roofing material. Instead, it applies wherever an ES-1-compliant roof edge assembly is required by the building code or project specifications.
Many commercial roofing systems can incorporate ES-1-tested edge components, including:
- TPO roofing systems
- PVC roofing systems
- EPDM roofing systems
- Modified bitumen roofs
- Built-up roofing (BUR)
- Some low-slope metal roofing assemblies
In each case, the roofing membrane may differ, but the perimeter edge system can still be designed and tested to comply with ES-1 requirements.
Roofing Systems Where ES-1 May Not Apply
ES-1 is primarily intended for low-slope commercial roofing systems. It generally does not govern:
- Most residential asphalt shingle roofs
- Clay or concrete tile roofs
- Wood shake roofs
- Steep-slope residential metal roofs
- Slate roofing systems
These roofing systems use different edge construction methods and are regulated by other building code provisions and product standards.
However, every project should be evaluated individually because certain commercial buildings with unique roof designs may have additional code requirements.
Why ES-1 Matters Regardless of Roofing Material
Many building owners assume the roofing membrane provides the primary wind protection. In reality, the roof perimeter often experiences the highest wind pressures.
If the edge metal fails:
- Wind can enter beneath the roofing membrane.
- Membranes may peel back rapidly.
- Insulation can become exposed.
- Water infiltration may occur.
- Large portions of the roof may require replacement.
For this reason, modern building codes emphasize properly tested edge securement systems alongside high-quality roofing materials.
Florida Buildings Require Special Attention
Florida experiences some of the highest design wind speeds in North America. Hurricanes, tropical storms, and severe thunderstorms place enormous stress on roof perimeters.
For many commercial projects, Florida building codes require roof edge systems to comply with ES-1 performance requirements. Contractors must also use products that have the appropriate Florida Product Approval or Notice of Acceptance (NOA), depending on the project’s jurisdiction and specifications.
Choosing ES-1-tested edge assemblies helps improve a roof’s ability to withstand severe weather while reducing the likelihood of costly wind-related failures.
Can Any Roof Be Upgraded to ES-1?
In many cases, yes.
Older commercial buildings may have roof edge systems installed before current ES-1 requirements became common. During reroofing projects, contractors frequently recommend replacing outdated perimeter components with modern ES-1-tested systems.
An upgrade may include:
- New fascia systems
- Stronger coping assemblies
- Improved fastening patterns
- Enhanced perimeter securement
- Manufacturer-approved edge components
These improvements often provide significantly better wind resistance without requiring a completely different roofing system.
How to Know If Your Roof Meets ES-1
Building owners should ask their roofing contractor several important questions:
- Are the roof edge components ES-1 tested?
- Which manufacturer supplied the edge system?
- Does the assembly match the roofing manufacturer’s approved details?
- Does the installation comply with local building codes?
- Are the required approvals and documentation available?
Professional roofing contractors should be able to provide documentation showing the tested performance of the installed edge assemblies.
Shieldline Roofing’s Expert Opinion
ES-1 does not apply to every roofing system. At Shieldline Roofing, we determine whether the standard applies based on the roof slope, membrane type, edge configuration, and applicable code requirements. For low-slope commercial roofs, the perimeter edge system is especially important because it must resist the project’s required wind loads.
Our Key Insights
The 2023 Florida Building Code specifically applies ES-1 requirements to metal edge systems on low-slope built-up, modified-bitumen, and single-ply roofs with slopes below 2:12. Gutters and counterflashing are excluded from this particular provision, while HVHZ projects may have additional RAS 111 requirements.
The Bottom Line
ES-1 does not apply to every type of roofing system, but it applies to many commercial low-slope roof edge assemblies regardless of the membrane installed. Whether your building uses TPO, PVC, EPDM, modified bitumen, or built-up roofing, properly tested ES-1-compliant edge systems are often essential for meeting code requirements and protecting the roof against wind uplift.
For commercial property owners in Florida, ensuring that both the roofing system and its perimeter edge components are properly designed, tested, and professionally installed is one of the most effective ways to maximize roof durability, improve storm resilience, and reduce the risk of expensive wind damage for years to come. Learn More
