Fire Resistance of Rubber Flooring | Safety Ratings Guide UK
Fire Resistance in Rubber Flooring
Fire safety regulations require specific flooring ratings for commercial and public buildings. This guide explains fire classifications and helps you select compliant rubber flooring.
EN 13501-1 Fire Classification
The European standard EN 13501-1 classifies flooring fire performance using a letter system:
| Class | Fire Performance | Smoke Production | Typical Use |
|---|---|---|---|
| A1fl / A2fl | Non-combustible | - | Stone, ceramic, concrete |
| Bfl-s1 | Very limited contribution | Low smoke | Commercial high-risk areas |
| Cfl-s1 | Limited contribution | Low smoke | Most commercial buildings |
| Dfl-s1 | Acceptable contribution | Low smoke | Lower-risk areas |
| Efl | Acceptable contribution | Not tested | Residential |
| Ffl | No performance determined | - | Not recommended |
Understanding the Ratings
The Letter (A-F)
Indicates contribution to fire spread—A being best (non-combustible) and F worst.
The "fl" Suffix
Indicates the rating is specifically for flooring applications.
The Smoke Class (s1/s2)
- s1: Low smoke production
- s2: Moderate smoke production
UK Building Regulations
Approved Document B specifies minimum fire ratings:
- Escape routes: Bfl-s1 minimum
- Most commercial spaces: Cfl-s1 minimum
- Residential: No specific requirement (Efl acceptable)
- High-risk areas: May require Bfl-s1 or non-combustible
Rubber Flooring Fire Performance
Standard rubber flooring typically achieves Cfl-s1 or Dfl-s1. Fire-retardant formulations can achieve Bfl-s1:
| Product Type | Typical Rating |
|---|---|
| Standard rubber tiles | Cfl-s1 to Dfl-s1 |
| Fire-retardant rubber | Bfl-s1 |
| Rubber with fire-retardant additives | Bfl-s1 to Cfl-s1 |
| Low-spec/economy rubber | Efl to Ffl |
When You Need Fire-Rated Flooring
- Escape routes: Corridors, stairways, lobbies
- Public buildings: Schools, hospitals, offices
- Commercial premises: Shops, restaurants, hotels
- Industrial: Factories with fire risks
- Insurance requirements: May specify ratings
Specifying Fire-Rated Rubber
- Determine required rating from building regulations or architect
- Request certification/test reports from supplier
- Ensure certificate covers the specific product you're buying
- Keep documentation for building control sign-off
Other Fire Standards
You may encounter these alternative standards:
- BS 476 Part 7: Older UK standard (Class 1-4)
- UL 94: US flammability rating
- ASTM E648: Critical radiant flux test
