Recently AAMA, American Architectural Manufacturing Association, and IGMA, Insulating Glass Manufacturing Alliance, have joined forces to create an even stronger organization called FGIA or Fenestration and Glazing Industry Alliance, designed to focus on bettering the glass and framing industry. Part of propelling the industry forward is education; choosing the right product for a building is crucial to a building's overall performance. The first step is knowing if you need an AW, CW, LC, or R rated window.