I checked all of the big box stores Home Depot, Lowe’s, Sear Etc etc. The Window Source of Athens was by far the best and lowest price. Now they say you get what you pay for in quality and workmanship and let me say The Window Source was great at both categories. I have an enclosed porch with six very large windows. They installed 3 double hung 36×54 and 3 sliders 54×54. They took the time to explain all aspects of the installation. One of the screens had a pin hole and they came back to install a new screen. Several of my neighbors have given a 5.0 rating on the windows.