Tri-State Custom Windows was originally established by an Amish family (the Hershberger’s) in 2002 in the town of Fennimore, WI. After being mentored under Eli Hershberger, my brother and I moved the business to Dodgeville, WI. We specialize in the manufacturing of vinyl windows. Locally owned and operated, we take pride in the quality of our windows. Backed by our limited lifetime warranty we will beat the price of any window that matches our quality.