Tee Jay Service Company is Northern Illinois' most complete source for pedestrian automatic and manual door sales and service. We specialize in a wide range of products including commercial swing door operators, automatic sliding, bi-folding and revolving doors as well as hollow metal and aluminum doors, frames and hardware. Our wide selection of accessories will cover your every need. Our professional and experienced sales staff is available to provide free surveys and estimates. Our A.A.A.D.M certified technicians are equipped with fully stocked vehicles, ready to maintain any type of pedestrian automatic or manual door. We take pride in providing you with the best possible value of quality products, and the personal, responsive customer service you deserve.