Declaration Critical Radiant Flux of 3-layer

In terms of fire resistance grading Coswick hardwood flooring has Class II according to the American Society of Testing Materials (ASTM) standards.

In the USA building materials are tested and classified according to the ASTM standards.
The main criterion of assigning materials as fireproof is their critical heat flux that prevents fire from spreading to the surface of the material.

Coswick hardwood flooring were tested according to ASTM E648 standard, which is a test to ascertain extreme heat flux parameters for flooring using radiant panel. It is determined by setting flooring aflame and measuring the extent of fire spreading from the ignition point. The higher the extreme heat flux parameter the better the fire resistance.