This International Standard specifies a method for assessing the wind-opposed burning behaviourand spread of flame of horizontally mounted floorings exposed to a heat flux radiant gradient in a testchamber, when ignited with pilot flames. Annex A gives details of assessing the smoke development,when required.This method is applicable to all types of flooring e.g. textile carpet, cork, wood, rubber and plasticscoverings as well as coatings. Results obtained by this method reflect the performance of the flooring,including any substrate if used. Modifications of the backing, bonding to a substrate, underlay or otherchanges of the flooring may affect test resul