Flexible sheets for waterproofing. Bituminous sheets for roof waterproofing. Determination of granule adhesion

This technical document establishes a standardized procedure for evaluating the adhesion of granules on flexible roofing membranes. It focuses specifically on materials designed for waterproofing roof surfaces, ensuring consistency in testing methodologies across the industry. The method outlines the necessary equipment, specimen preparation steps, and the precise mechanical process required to measure the bond strength between the protective granular layer and the underlying bituminous base. By following the prescribed protocol, manufacturers and testing laboratories can determine whether a product meets specific performance criteria regarding granule retention under various conditions. This approach facilitates the comparison of different roofing systems and supports quality assurance processes within the construction sector. The guidelines detail how to apply controlled forces to the material surface to assess potential granule loss, providing a reliable metric for product durability and longevity. Adherence to this methodology ensures that data generated during testing is reproducible and comparable, contributing to uniform standards for roofing material evaluation without introducing subjective interpretation into the assessment process.