B2 Fire Class and Polyurethane Decorative Profiles
B2 is a classification for organic building materials within DIN 4102-1. This guide explains the registered fire class of Polure polyurethane decorative profiles and the conditions that influence their use.
Polure polyurethane profiles: registered fire classification
Polure polyurethane decorative profiles have the registered fire class B2 (DIN 4102-1) and contain phosphorus-based flame retardant additive.
The classification applies within DIN 4102-1. Polyurethane profiles are decorative, non-load-bearing elements and are not designed to support loads, televisions or chandeliers.
Reading the A and B groups in DIN 4102-1
DIN 4102-1 groups building materials according to their fire behaviour under the A and B classifications.
- A covers mineral or inorganic building materials.
- B is used for organic materials.
- B2 is the normally flammable class.
- B1 is the class above B2.
- B3 is the easily flammable class.
The assigned class describes material behaviour under test conditions and does not replace decisions about the intended project application.
What B2 does not indicate
B2 is the normally flammable class in DIN 4102-1; it is not B1 or A.
The B2 designation refers to the classification within DIN 4102-1. The profile should be positioned away from open flames and high-heat sources, with installation conditions suitable for the project.
How DIN 4102-1 relates to EN 13501-1
EN 13501-1 provides a European system for classifying the fire behaviour of building materials.
Its classifications do not correspond directly to those under DIN 4102-1. For this reason, the DIN 4102-1 B2 designation should not be treated as a direct conversion into another standard.
Polyurethane profiles beside fireplaces and heat sources
For a real-flame fireplace, a polyurethane profile must be installed without direct contact with the heat source.
A suitable heat insulation barrier and sufficient distance are planned according to the application. Areas that may become warm should also be considered in electric fireplace and LED installations. For a fireplace surround, request technical guidance from the Polure sales team based on the project conditions and profile placement.
Requesting fire classification information for a project
A request for fire classification information is reviewed according to the building’s use and the requirements of the project.
Regulatory conditions for facades, escape routes and comparable areas should be examined with the project designer. A technical data sheet for Polure products can be requested from the sales team.
