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Excalibur® windows from Alside are beautiful and remarkably solid, sturdy and stable. Plus, our beveled mainframe design is exceptionally slim and refined. Their sleek construction easily complements any type of architecture.

You’ll find that Excalibur vinyl frames will never chip, peel, crack or warp, and will never need painting or caulking. And Excalibur's tilt-in sashes make cleaning a pleasure. You'll save money on energy bills because Excalibur's superior all-weather performance helps reduce heating and cooling costs.

The ultimate choice for beauty, comfort and energy efficiency, Excalibur windows help to pay for themselves through lower energy costs, freedom from maintenance and increased property values. Plus, our impressive Lifetime Limited Warranty* delivers the peace-of-mind you would expect from an industry leader.

  1. Vinyl frames and sashes will never chip, peel, crack or warp.  Made tough and solid with PVC resin, their color is formulated throughout so the beautiful luster lasts.
  2. Multi-chambered sash and mainframe create insulating air spaes for thermal efficiency.
  3. Insulated glass unit featuring double strength glass with optimal air space improves year round performance.
  4. Warm Edge Spacer System maximizes performance and longevity.
  5. Interlock at sash meeting rails adds to your sense of security, comfort and well-being.
  6. Protective bulb seal helps to prevent air infiltration at the meeting rail.
  7. Fully extruded lift rails provide strength and stability for easy operation.
  8. Drop in glazing for extra protection from the elements.
  9. Sloped sill forces water to drain to the exterior of the window.
  10. Hidden screen track for clean lines and added beauty.
  11. Protective bulb seal at the sill provides extra protection from the elements – sealing tightly against dust, dirt and air infiltration.
Plus these additional features:
  • Fusion-welded frames and sashes add strength and rigidity.
  • Dual ventilator locks provide a safe, secure way to keep windows open for proper ventilation.
  • Full balance covers help protect against air infiltration while adding a finished look to the window frame.
  • Constant force balance system eliminates sash cords, weights and pulleys. You’ll benefit from smooth, comfortable fingertip operation.
  • Tilt-in top and bottom sashes make cleaning safe and easy from inside the home.
  • Double barrier-fin weatherstripping at sash sides helps keep out dirt and noise, and protects against air infiltration.
  • Beveled exterior profile gives windows a clean, elegant look.