Series 1240 Commercial Aluminum Thermal-Break Sliding Patio Doors

  • Frame Depth = 4-1/2″
  • AAMA Rating: SGD-C40
  • Insulated Glass Unit Depth = 1″ ~ for greater insulation & sound reduction.
  • Double Strength Tempered Glass Panes
  • PPG “Intercept” Insulated Glass Spacer ~ the “warm-edge” technology of choice.
  • Heavy-Duty Adjustable Dual Tandem Ball Bearing Rollers
  • Heavy-Duty Latch Handle
  • Fibermesh Locking Screen

Product Description

This Crystal® ThermoBlok™ aluminum sliding patio door series features a high performance frame structure, an innovative polyurethane thermal barrier technology that thermally breaks conductivity of the aluminum frame to substantially reduce thermal transfer from exterior of door frame to interiors, and “intercept” warm edge glass spacer technology. These integrated features reduce heating and cooling loads on HVAC systems, providing long term energy efficiency and utility savings to property owners. Coordinating side light and architectural transoms and decorative between-the-glass grids make this series popular with home owners.

Options / Styles

  • Various Styles:
      • Two Panel
      • Three Panel


    • Argon & Low-E ~ to enhance the thermal performance of the window.
    • Between-the-Glass Grids ~ to provide the elegant appearance of divided light.
    • Custom Colors and Finishes
    • Sidelight/Transom Units ~ for special installations.
    • Cylinder Key Lock
    • Reversible Panels
    • Secondary Overhead Pin Lock