William S. Trimble Co., Inc. is a full service supplier of building specialties, in business since 1936.

We are divided into three divisions:

William S. Trimble Co. is a supplier of commercial doors (wood and metal), frames, hardware, windows, toilet partitions, toilet accessories, and many other specialty items.

Trimble Residential Products is a distributor of residential doors, windows, hardware, and skylights. We distribute Kolbe windows and doors, Emtek hardware, and Velux skylights. All of these products can be seen in our modern 5,000 sq. ft. showroom. Our Kolbe design center hours are 9:00am-5:00pm M-F and by appointment on Saturday. Our professional sales staff is ready to assist you with all of your building needs.

Overhead Door Company of Knoxville is a supplier and installer of commercial and residential overhead garage doors, commercial rolling steel doors, security grills, dock equipment, and other traffic related opening products.

Our expertise is unmatched in the industry. We have a DAHC (Distinguished Architectural Hardware Consultant) and 4 AHC’s (Architectural Hardware Consultants**) on staff to provide technical expertise and meet all of your consulting needs.

**Architectural Hardware Consultant is a certification issued by the Door and Hardware Institute (DHI), a governing body of the industry, upon successful completion of a detailed, tested course.