Roser is ISO9001 certified, UL classified, and a KS (South Korean Standard) mark acquired company. Manufacturing is in a single facility, allowing Roser to better control production standards and produce a consistently higher quality product that often exceeds that of other competitors. Roser Roofing Systems products are engineered, tested, and proven to excel in all extreme climatic conditions throughout the world. Roser ensures high consistent quality by single sourcing a "high tech" steel, US produced 3M roofing granules and industry-leading base acrylics.