Integrity windows and doors are made with Ultrex®, a pultruded fiberglass patented by Marvin family of windows and doors.

It outperforms and outlasts vinyl, roll-form aluminum and other fiberglass composites. Ultrex and proprietary pultrusion process is used to manufacture high-demand windows and doors that endure all elements without showing age or wear. 


  • All Ultrex Windows
  • Wood Ultrex Windows
  • Sliding Patio Doors
  • French Outswing Doors
  • French Inswing Doors

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