What is the fine-grained topic of the following text: We are also certified with GAF, Certainteed, Versico and JP Stevens, along with all major metal suppliers including Imetco, McElroy, Berridge, Fabral, Peterson and Uniclad which allows us to offer you a 20 year water tightness warranty on our standing seam systems and incorporate the metal warranties into our roofing systems. Only return the topic.
Certifications and warranties of a roofing company