A History of Sahr Building Supply, Inc. Gene N. Sahr purchased Roth Brothers Building Products in 1977. Sahr Building Supply, Inc. started with three employees and has grown to 27 employees in the same location in Kalamazoo, and a similar location in Lansing. Sahr is a distributor of commercial doors, frames, and door hardware. Sahr is a member of the Kalamazoo County Chamber of Commerce, Kalamazoo Northside Business Association, National Federation of Independent Business, American Subcontractors Association, and Door and Hardware Institute. Our commitment to you: Since 1977, Sahr Building Supply has been committed to furnishing quality products and service to you, our customer. Sahr Building Supply is a stocking distributor of Ingersoll Rand and Assa/Abloy commercial doors, frames, and hardware along with toilet partitions and accessories. As a registered member of the Door and Hardware Institute with two Architectural Hardware Consultants and one Access Control Security Systems Consultant on staff, we can provide the technical knowledge you need. With project management and fabrication facilities in Kalamazoo and Lansing, you can be assured of prompt material delivery and customer service satisfaction for any size project. Our work is good. We promise. And behind that promise, we want you to know that we back our work with a satisfaction guarantee. We won't stop working until you like what we've done.