For those who want the best, we offer the top of the line full wall depth Gliding Basement Window manufactured by Northview Windows. The full 8" depth main frame is manufactured with extra thick PVC and the corners are then fusion welded for optimum strength and weather tightness. The window is shipped fully braced for use as new construction in poured concrete wall construction or it can be installed in existing openings for remodeling. The window is designed as a double glider, meaning that both sash operate and can be removed easily without tools. The sash have fusion welded corners for extra strength and dual rollers on each for smooth, easy glide action with full perimeter weather-stripping to stop water and air infiltration. The sash meeting rails interlock with each other for added strength and security with a hook latch type lock to secure them together. As standard, the window has 3/4" clear insulated glass with the option of LowE coated glass to meet most of today's stringent energy codes. An aluminum framed , fiberglass mesh screen is included with each window. The 8" Wall Gliding Basement Windows are available is 3 standard sizes.