Endura has vertically integrated the processes of door component manufacturing, enabling us to have control from raw materials to finished product. These capabilities are not matched by any of our direct competitors. Some companies can handle wood machining for mulls, some can handle the sills, and still others can handle the extrusions for door bottoms and weatherstrip. Endura is the only manufacturer able to bring it all together. We have done the research, development and testing to determine the benefits to be gained by controlling every aspect of our products.