Aluminum Patio Doors

Features & Benefits

  • Thermally broken anodized aluminum frame and sash for energy efficiency and longevity.
  • Drainage system with anti-return flap keeps rainwater out.
  • Energy efficient Low-E glass with argon.
  • Warm-Edge Spacer System for minimum heat transfer.
  • Aluminum frame and sash for enhanced strength and stability.


  • 6 Widths
  • 9 Configurations of Opening and Fixed Panels
  • 2 Grid Options
  • 2 Interior Color Options
  • 3 Exterior Color Options


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Does Thermally Broken Mean It Already Needs Repairs?

The term “thermally broken” is industry jargon relating to the energy efficiency of a window or door’s frame. Though it seems surprising to lay people, the frame of a window or door is just as important, if not more so, than its glass in terms of energy efficiency.

Because aluminum is metal, and metal conducts heat energy, an aluminum frame could mean lots of heat transfer from outdoors to indoors and vice versa. Thermally broken window and door frames are insulated with a non-metallic polyamide strip, sandwiched between the interior and exterior aluminum faces to prevent heat transfer.

Anodizing is an electromagnetic process that further insulates and strengthens aluminum frames to provide a long-lasting, corrosion-resistant finish.

NT Window sliding patio door frames are both thermally broken and anodized, making them a great value now … and in the future.

Warm-Edge Spacer System for Energy Savings and Endurance

Enjoy years of dependable performance with our Warm-Edge Spacer System.

The Warm-Edge Spacer System represents a cutting-edge insulated glass technology, integrating a dual-seal silicone structure with patented stainless steel spacers to replace traditional aluminum that readily conducts heat energy. Recognized for its strength and durability, our Warm-Edge Spacer System is among the most robust spacer systems available today.

Which Window Style Is Best For You?

When choosing the style of windows for your space, you should consider more than appearance alone. Each window style has its own unique attributes and, therefore, should be used for particular applications.

  • Single-Hung

    Single and double-hung windows look very similar. However, in a single-hung window, only the bottom sash (glass pane) opens.

    ● Cost effective
    ● Safe
    ● Easy to operate

  • Double-Hung

    Some people appreciate the versatility of a double-hung window in which both the bottom and top sash open.

    ● Flexible
    ● Maximum air flow
    ● Easy to clean

  • Picture

    A picture window does not open and does not typically have a grid to interfere with the view of the outdoors.

    ● Unencumbered views
    ● No maintenance
    ● Modern aesthetic

  • Sliding

    A sliding window is a great choice for a wide window opening. Like picture windows, sliding windows do not often have grids.

    ● Cost effective
    ● Low maintenance
    ● Easy to open