Tested configurations, Class A results, and laboratory documentation for project review
ASTM E84 Class A Moss Wall Systems: Test Results & Report Numbers
Sep 10, 2026
Visual Fire Performance Demonstration
This video provides a visual fire-performance demonstration of SeamlessMoss SM-200 and FlexMoss FM-150. It is not the ASTM E84 test method. Official Class A classifications are based on independent ASTM E84-26a laboratory testing.
1. What the Class A Results Cover
Tested Assembly Scope
The ASTM E84-26a testing was conducted on the complete tested assembly configurations of SeamlessMoss SM-200 and FlexMoss FM-150, including the preserved moss and the corresponding backing as part of each system.
The Class A results therefore apply to the tested SM-200 and FM-150 assemblies as a whole, not to preserved moss or PET/felt backing tested separately.
Design Innovation and Problem Solving
1. What the Class A Results Cover
Tested Assembly Scope
The ASTM E84-26a testing was conducted on the complete tested assembly configurations of SeamlessMoss SM-200 and FlexMoss FM-150, including the preserved moss and the corresponding backing as part of each system.
The Class A results therefore apply to the tested SM-200 and FM-150 assemblies as a whole, not to preserved moss or PET/felt backing tested separately.
Design Innovation and Problem Solving
2. Why ASTM E84 Matters for Commercial Projects
In commercial interior projects, fire-performance documentation is often part of product evaluation, specification, material submittal, and code review. ASTM E84 provides a standardized way to evaluate the surface-burning characteristics of a tested material or assembly.
For architects and designers, the results provide documented fire-performance data to support product selection and specification. For general contractors and project teams, the laboratory report can support material submittal and code review.
ASTM E84 reports two key values:
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Flame Spread Index (FSI): indicates the relative rate of flame spread across the tested surface.
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Smoke Developed Index (SDI): indicates the relative amount of smoke developed during the test.
For a Class A surface-burning classification:
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FSI: 0–25
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SDI: 0–450
The classification applies to the specific assembly tested, so the applicable laboratory report should be reviewed when evaluating a system for a project.
Design Innovation and Problem Solving
3. Using the Reports for Submittal & Code Review
3.1 Available Project Documentation
For project review, Wildleaf can provide:
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The applicable ASTM E84 laboratory report.
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Product data.
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CSI specification support.
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Clarification of the tested assembly configuration when reviewer questions arise.
3.2 What to Include in a Submittal
When referencing the fire-performance documentation, include:
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Product system.
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ASTM E84-26a.
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Class A classification.
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Flame Spread Index (FSI).
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Smoke Developed Index (SDI).
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Laboratory report number.
4. Frequently Asked Questions
Class A fire-performance documentation is commonly requested in commercial projects where interior finish materials are reviewed as part of the specification, submittal, or code approval process. This is especially relevant for projects such as workplaces, education, healthcare, hospitality, retail, fitness, and other public or high-occupancy interiors. The final requirement depends on the project specification, applicable code, and authority having jurisdiction.
Fire-performance requirements are often considered more closely in lobbies, reception areas, corridors, common areas, amenity spaces, large feature walls, and other highly visible or frequently occupied interior spaces. Not every location in a project is necessarily reviewed the same way. The applicable requirement should be confirmed based on the specific installation location and project criteria.
No special “fire-rated color” is required. Wildleaf’s Class A systems are SeamlessMoss SM-200 and FlexMoss FM-150, and the standard moss color options use the same consistent material system. Designers can select the color and visual direction based on the project design rather than choosing a separate color specifically for fire performance.
Related Technical Resources
Project Documentation​