Direct Answer
ANSI/SPRI ES-1 tests the wind resistance of metal roof edge systems used on low-slope commercial roofs. It evaluates whether specific roof edge assemblies can resist simulated wind loads without pulling apart or failing at critical connections. The standard focuses on three test methods: RE-1, RE-2, and RE-3, which address different roof edge configurations and their resistance to wind forces.
For commercial property owners, developers, general contractors, architects, and roofing professionals in Florida, ES-1 is important because roof edges are vulnerable to high winds. If edge metal or membrane terminations fail, wind can lift the roofing system, expose the building to water intrusion, and cause damage to adjacent property.
The current published standard is ANSI/SPRI/FM 4435/ES-1-2022, titled Test Standard for Edge Systems Used with Low Slope Roofing Systems. It establishes test requirements for roof edge systems under simulated wind loading. The specific requirements applicable to a project depend on the adopted building code, local jurisdiction, and project design criteria.
Sources: ANSI/SPRI/FM 4435/ES-1-2022 standard and the SPRI ES-1 testing FAQ.
Who This Applies To
- Commercial property owners and asset managers
- Commercial roofing contractors and subcontractors
- General contractors managing new construction or re-roofing projects
- Architects, engineers, and roofing consultants
- Developers constructing commercial buildings in Florida
- Condominium associations and property managers overseeing applicable low-slope roof systems
- Building officials and construction quality-control professionals
Not for: ES-1 is not a general roof condition inspection, a wind mitigation inspection, or a test of the entire roofing assembly. It specifically addresses roof edge system resistance to wind loading. Other standards and project requirements may apply to the roof membrane, structural deck, attachments, gutters, and other building components.
1. What Is ANSI/SPRI ES-1?
ANSI/SPRI ES-1 is a recognized test standard for evaluating the wind resistance of metal edge systems used with low-slope roofing systems.
These systems may include:
- Metal fascia and gravel-stop systems
- Metal coping systems installed over parapet walls
- Roof edge assemblies that secure or terminate roofing membranes
- Other applicable perimeter edge metal systems used with low-slope roofs
The edge of a commercial roof is more than a decorative finish. It can serve as a critical transition between the roof membrane and the building exterior. Depending on the assembly, it may also help secure the membrane against wind forces.
During strong winds, pressure and suction forces can act on roof surfaces and perimeter components. If the edge assembly is inadequately designed, improperly fabricated, or incorrectly installed, it may fail and expose the roof system to further damage.
The International Institute of Building Enclosure Consultants (IIBEC) explains that ES-1 provides a basis for laboratory testing of roof perimeter metal edge flashings, excluding gutters, and is referenced by building codes for applicable low-slope roof systems.
2. What Does ES-1 Actually Test?
ANSI/SPRI ES-1 includes three principal test methods. Each evaluates a different type of roof edge configuration or its relationship to the roofing membrane.
| Test Method | What It Evaluates | Typical Application |
|---|---|---|
| RE-1 | Resistance of roof edge termination systems associated with ballasted or mechanically attached membrane systems | Applicable edge terminations where the membrane is not fully adhered to the substrate or is mechanically attached within the specified distance from the edge |
| RE-2 | Pull-off resistance of edge flashing systems with an exposed horizontal component of 4 inches or less | Applicable fascia and gravel-stop configurations |
| RE-3 | Pull-off resistance of coping systems with an exposed horizontal component greater than 4 inches | Applicable parapet coping assemblies |
The appropriate test depends on the configuration and intended use of the roof edge system. The applicable standard and project specifications should be consulted to determine the required testing.
For the detailed descriptions, see SPRI’s explanation of RE-1, RE-2, and RE-3 and the 2022 ES-1 test standard.
3. RE-1: Roof Edge Membrane Termination Testing
RE-1 evaluates applicable roof edge termination systems associated with ballasted or mechanically attached membrane roofing systems.
These configurations can place substantial demands on the edge termination because wind forces acting on the membrane may transfer loads to the perimeter attachment.
The test evaluates the resistance of the applicable termination arrangement to those forces.
For commercial construction, the relevant questions include:
- Does the edge termination correspond to the specified roofing system?
- Is the applicable termination configuration supported by the required test documentation?
- Does the tested resistance satisfy the project’s required design loads?
- Will the installed assembly match the tested configuration?
RE-1 is particularly relevant when the edge assembly serves as an important attachment point for a membrane roofing system.
4. RE-2: Pull-Off Testing for Edge Flashings
RE-2 evaluates the pull-off resistance of applicable roof edge flashing systems with an exposed horizontal component of 4 inches or less.
These systems can include metal fascia and gravel-stop configurations used along the perimeter of commercial buildings.
The purpose is to evaluate whether the tested assembly can resist the specified wind-related forces without unacceptable pull-off failure.
When reviewing a commercial roofing submittal, the project team should verify:
- The tested product corresponds to the proposed edge flashing.
- The configuration and dimensions are appropriate for the installation.
- The manufacturer’s documentation identifies the tested assembly.
- The assembly’s resistance satisfies the project design requirements.
- The installation follows the manufacturer’s applicable details and instructions.
Using metal that looks similar to a tested product does not automatically establish that the proposed assembly has equivalent resistance.
5. RE-3: Pull-Off Testing for Coping Systems
RE-3 evaluates the pull-off resistance of applicable coping systems with an exposed horizontal component greater than 4 inches.
Copings typically protect the tops of parapet walls and help form a weather-resistant transition at the building perimeter.
Because coping assemblies have their own geometry and exposure to wind forces, they require the appropriate testing rather than automatically relying on results from a different type of edge flashing.
For developers and general contractors, important checks include:
- Confirming that the proposed coping assembly has the appropriate test documentation.
- Verifying that the tested configuration matches the specified design.
- Confirming that the required wind resistance is appropriate for the project.
- Checking attachment details, cleats, fasteners, and other specified components.
- Confirming that the installation matches the approved details.
See the SPRI FAQ on complete edge system testing for additional information about fascia and coping assemblies.
6. What Does ES-1 Not Test?
Understanding the limits of ES-1 is just as important as understanding its purpose.
ES-1 is not a test of every component or performance characteristic of a commercial roof.
| Component or Issue | Does ES-1 Directly Evaluate It? | What to Consider |
|---|---|---|
| Applicable metal roof edge systems | Yes | Resistance under the applicable test method |
| Applicable coping assemblies | Yes | Pull-off resistance under RE-3 |
| Applicable membrane edge terminations | Yes | Resistance under RE-1 |
| Entire roof membrane field | No, not as a complete roofing assembly | Evaluate the applicable membrane system and attachment requirements separately |
| Structural roof deck capacity | No, not as a complete structural evaluation | Verify structural design and attachment requirements separately |
| External gutters | No | Review applicable gutter standards, including ANSI/SPRI GT-1 where required |
| Roof leaks and existing deterioration | No | Conduct appropriate roof condition inspections |
| Whole-building wind mitigation | No | Evaluate the broader building envelope and applicable mitigation criteria |
The National Roofing Contractors Association (NRCA) distinguishes ES-1 testing for perimeter edge metal systems from GT-1 testing for external metal gutters.
7. How Does ES-1 Relate to Wind Loads?
Testing is only one part of selecting a suitable roof edge system. The assembly must also have sufficient resistance for the design conditions applicable to the building.
Project-specific considerations can include:
- Building location and applicable wind-speed criteria
- Building height
- Roof geometry
- Location of the edge system on the roof
- Applicable wind pressure and suction demands
- Roof edge configuration
- Substrate and attachment details
The design team must establish the required resistance using the applicable building code and engineering criteria, then select a tested system that meets or exceeds the required performance.
An ES-1-tested product is not automatically suitable for every building. The tested resistance must be appropriate for the project’s design loads.
8. Why Does ES-1 Matter in Florida?
Florida commercial buildings can be exposed to hurricanes, tropical storms, and strong wind events. Roof edge performance is therefore an important consideration when designing or replacing low-slope commercial roofing systems.
Edge failure can expose the membrane termination, allow water intrusion, and contribute to progressive roof damage.
For Florida projects, the design and construction team should:
- Determine which edition of the Florida Building Code applies to the permit and project.
- Confirm the applicable requirements for roof edge securement and coping systems.
- Establish project-specific design wind loads.
- Specify an appropriate tested edge system.
- Verify that the product documentation matches the proposed installation.
- Confirm that the installed assembly follows the approved details.
Do not assume that a product meets every Florida requirement simply because its literature mentions ES-1. Confirm the applicable code, testing documentation, design pressures, and any additional requirements imposed by the local building department.
For additional context, consult the Florida Building Commission and the SPRI ES-1 resources.
9. Why the Exact Fabricated Product Matters
A product’s test documentation must correspond to the assembly actually being supplied.
Differences in materials, dimensions, fabrication methods, cleats, fasteners, and assembly configuration can affect performance.
SPRI’s published position is that edge securement products should be tested for the relevant ES-1 methods as applicable and that testing should account for the fabricator producing the product.
For procurement and quality control, verify:
- The fabricator’s identity
- The product model and configuration
- Material and metal gauge
- Applicable dimensions
- Test documentation and reported resistance
- Installation instructions
- Any permitted variations from the tested assembly
Do not assume that two visually similar products from different fabricators have identical tested performance.
Sources: SPRI’s position on ES-1-tested products and the SPRI FAQ.
10. What Should a General Contractor Verify in an ES-1 Submittal?
For a new commercial building or re-roofing project, the general contractor should review the edge system submittal against the specifications and approved details.
A practical review checklist includes:
- Confirm the required ES-1 test method or methods.
- Verify that the product documentation identifies the proposed assembly.
- Check that the reported resistance meets the required design loads.
- Confirm that the proposed dimensions and materials match the tested configuration.
- Review the attachment method, cleats, clips, and fastener requirements.
- Verify substrate and nailer requirements against the project documents.
- Confirm compatibility with the specified roofing membrane and termination detail.
- Review manufacturer installation instructions.
- Resolve discrepancies before installation.
- Retain approved submittals and closeout documentation.
ES-1 documentation should not be treated as a substitute for checking the complete installation requirements. A tested assembly can underperform if it is installed differently from the configuration on which the testing was based.
11. What Is the Difference Between ES-1 Testing and a Roof Inspection?
These activities serve different purposes.
| Activity | Main Purpose | Typical Timing |
|---|---|---|
| ES-1 testing | Evaluate the wind resistance of an applicable roof edge assembly | Product qualification and design/specification |
| Roof installation observation | Check installation against project requirements and approved details | During construction or re-roofing |
| Roof condition inspection | Identify existing deterioration, deficiencies, and maintenance concerns | During maintenance, due diligence, or insurance review |
| Wind mitigation inspection | Evaluate applicable wind-resistance features of the building or roof system | When requested for a defined mitigation or insurance purpose |
A roof condition inspection cannot replace the required product testing documentation, and an ES-1 test report does not prove that a particular roof edge was installed correctly.
12. What Happens If the Wrong Edge System Is Installed?
If the specified edge system is replaced with an unverified product or installed differently from the approved details, the project team may be unable to demonstrate that the installed assembly meets the required wind resistance.
Potential consequences include:
- Submittal rejection
- Construction delays
- Corrective work or replacement
- Difficulty demonstrating code compliance
- Increased risk of edge failure during high winds
- Disputes over scope, workmanship, or responsibility
Address substitutions and installation discrepancies before the edge metal is concealed or the project reaches closeout. Retaining the test documentation, approved submittals, installation details, and relevant observation records helps establish what was specified and installed.
Bottom Line
ANSI/SPRI ES-1 tests the wind resistance of applicable metal roof edge systems through RE-1, RE-2, and RE-3. These methods address membrane edge terminations, edge flashings, and coping systems according to their configurations.
ES-1 does not test the entire roofing system or establish that a completed roof is free from defects. The appropriate tested assembly must satisfy the project’s design wind loads, and the installed system must match the approved configuration and applicable installation requirements.
For commercial projects in Florida, verify the applicable building code, design pressures, fabricator documentation, tested assembly, and installation details before approving the roof edge system.
Related Questions
- What Is a Pre-Installation Roofing Conference, and Why Does It Matter?
- What Does a Commercial Roof Observation Report Include?
- What Roofing Closeout Documents Should a GC Collect Before Turnover?
Sources
- ANSI/SPRI/FM 4435/ES-1-2022 — Test Standard for Edge Systems Used with Low Slope Roofing Systems
- SPRI — Low Slope Roofing and ES-1 Testing FAQs
- SPRI — Position on ES-1-Tested Products
- IIBEC — Understanding ES-1: Proper Specification and Implementation
- NRCA — Testing of Shop-Fabricated Edge Metal
- Florida Building Commission
Last reviewed: October 2026
Related Resources
What Does a GC Need to Know About Manufacturer Warranty Inspections on a New Commercial Roof?
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Disclaimer: This information is provided for general educational purposes and is not engineering, architectural, legal, code-compliance, or insurance advice. Applicable standards, building codes, and project requirements vary. Confirm the required standard edition, design loads, tested assemblies, and installation details with the project’s design professional, building official, manufacturer, and qualified roofing contractor.
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