ASTM E3118
Test Method for Fire Tests of Roof Eave Details
Last updated: September 21, 2025
Contents
Overview
ASTM E3118 evaluates the fire performance of roof eave construction when exposed to flames from below, simulating fire exposure from adjacent burning structures or vegetation. This test is crucial for CBC Chapter 7A compliance and addresses one of the most vulnerable areas of a building during wildfire events.
Test Requirements
- 10-minute gas burner exposure simulating wildfire conditions
- Heat flux of 25 kW/m² applied to eave assembly
- Temperature monitoring at multiple critical points
- Visual observation for flame spread and structural integrity
- Post-test inspection for char depth and damage assessment
Performance Requirements
| Parameter | Requirement |
|---|---|
| Flame spread | No sustained flaming after burner removal |
| Maximum temperature | Critical locations must remain below 800°F |
| Structural integrity | No collapse or separation during test |
| Self-extinguishment | Within 2 minutes of burner removal |
Applications
- Open eave construction with exposed rafters
- Enclosed eave assemblies with soffits
- Complex eave designs with decorative elements
- Retrofit solutions for existing buildings
- New construction in WUI zones
Market Insights
Market Demand
Required for all new construction and significant remodels in California WUI zones since 2008. Huge retrofit market with 500,000+ homes needing upgrades.
Innovation Opportunities
Driving development of new fire-resistant materials and assembly designs that maintain architectural aesthetics while providing protection.
Compliance is Mandatory
All new construction and major renovations in California WUI zones must comply with ASTM E3118.
Resources
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