Our Story

Heritage, Hard Work, and Cornerstone Metals

Cornerstone Metals is more than just a metal roofing and siding supplier; we are a business deeply rooted in the enduring values of the Amish community here in Sherman, New York. Our story is one of tradition, dedication, and a commitment to quality that you can see in every panel we produce. The foundation of our company was originally laid by Andy Miller and his family, who built a reputation for honest work, meticulous craftsmanship, and serving others. Today, Cornerstone Metals is proudly owned and operated by Monroe Hostetler and Mervin Yoder. Sharing the same Amish heritage as our founders, Monroe and Mervin are dedicated to preserving these core principles. They ensure that every customer interaction is guided by integrity and that every product continues to meet the highest standards of our community. When you choose Cornerstone Metals, you are supporting a dedicated team that lives and works right here in the community, dedicated to providing neighbors and businesses alike with the finest metal products available. 

The Hillside Advantage

Quality That’s Rolled In

What sets Cornerstone Metals apart from the competition is simple: We control the quality from start to finish. Unlike many suppliers who purchase pre-cut materials, we have made a significant investment in our own facility and equipment. Our greatest manufacturing advantage is that we roll our own steel on-site. This capability provides you with several key benefits:
  • Superior Quality Control: By rolling the steel ourselves, we can inspect and maintain the highest standards at every stage of the manufacturing process, ensuring your materials are perfectly formed, consistent, and durable.
  • Customization and Speed: It allows us to process and fulfill custom orders quickly and precisely, reducing lead times and ensuring you get exactly what your project demands.
  • Best Value: By cutting out the middleman and doing the work ourselves, we pass the resulting efficiency and savings directly on to you, our customer.
From the raw coil to the finished panel, we personally guarantee the longevity and performance of every piece of metal that leaves our facility.z