ISO 11925-2:2026

Overview

ISO 11925-2:2026 is an international standard issued by the International Organization for Standardization (ISO), dedicated to reaction to fire tests of materials. Specifically, it establishes the procedure to evaluate the ignitability of products subjected to direct flame exposure using a single-flame source test. This standard is a crucial part of assessing fire performance, helping manufacturers, construction professionals, and regulatory bodies determine how materials will perform when exposed to small flames in real-life scenarios.

The test is conducted under controlled conditions with zero impressed irradiance (no external radiant heat) and employs vertically oriented test specimens. ISO 11925-2 is widely recognized in the building and construction industries as an essential tool for fire safety performance classification of both flat and non-flat materials.

Key Topics

• Purpose: Determines the ignitability of products by direct small flame application.
• Test Method: Utilizes a vertically oriented specimen exposed to a single-flame source, with no radiant heat applied.
• Specimen Preparation: Includes guidelines for dimensions, handling multi-layered and non-flat products, and necessary conditioning prior to testing.
• Exposure: Tests both surface and edge ignition for representative results.
• Flame Application: Provides precise protocols for flame application time (15 or 30 seconds) and position to simulate real fire conditions.
• Result Recording: Observes and documents ignition, flame spread, production of flaming droplets or particles, and self-extinguishing behavior.
• Reporting: Standardizes the test reporting methods to ensure consistency, including information on deviations, results, observations, and product descriptions.

Applications

ISO 11925-2:2026 is primarily used in:

• Building Materials Testing: Essential for evaluating insulation, wall coverings, flooring, and other construction materials to meet regulatory fire safety standards.
• Product Development: Enables manufacturers to design products with improved fire resistance by providing objective ignitability data.
• Certification and Compliance: Forms a core part of fire safety classification systems worldwide, supporting regulatory approvals and CE marking in Europe.
• Quality Control: Offers repeatable laboratory testing to ensure batch-to-batch consistency in fire performance of materials.
• Risk Assessment: Assists building designers and safety engineers in selecting appropriate materials for minimizing fire hazards.

The standard is applied to a broad spectrum of products, including but not limited to:

• Flat panels and sheet materials
• Multi-layered composites
• Perforated or non-standard shape components
• Loose fill insulation materials

Related Standards

Implementing ISO 11925-2:2026 often requires consideration of related fire safety and testing standards, such as:

• ISO 13943: Fire safety - Vocabulary
• ISO 14697: Reaction-to-fire tests - Guidance on the choice of substrates for building and transport products
• EN 13238: Reaction to fire tests for building products - Conditioning procedures and general rules for selection of substrates

Integration with other ISO 11925 series parts and regional fire test standards can further enhance comprehensive material assessment.

ISO 11925-2:2026 is a key resource for professionals concerned with fire safety, providing a consistent, internationally recognized methodology for ignitability assessment. Adoption of this standard helps ensure that products meet stringent safety requirements, protecting people and property from fire risks.