Our sliding door is designed to nestle into the frame such that it creates a superior, rigid weatherseal while the “van style” door provides a superior compression seal. The pultruded fiberglass frame and design allow exceptional products to be created, including 8-foot tall bi-parting doors with 16-foot width, and 8-feet of venting area (Ask about over-size custom sizes also). Add sidelites or transoms above, to create walls filled with the frame for a positive, and open position luminance and ventilation.