Textile floor coverings — Non-destructive measurement of pile thickness above the backing — WRONZ gauge method

The method is based on determination by measuring the distance between the planes of the pile surface located under a standard pressure and the plane of the backing surface located under a standard loading. This method and that of ISO 1766 may not give identical results. In case of dispute or where maximum accuracy is required, thickness shall be determined by the method of ISO 1766.