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High Performance ProductsHorizontal Sliding Windows

Alpen HPP Fiberglass Windows - Horizontal Slider WindowAlpen Window’s sliding windows are designed to open effortlessly. Our sliding windows offer the maximum glass area of any operable window making them the perfect choice for a modern, Mediterranean, ranch or prairie style home.

Alpen Window’s sliding windows open without using any interior or exterior space thereby satisfying egress requirements. All of our sliding windows feature a sash that can be effortlessly tilted in or removed from the inside of your home for easy cleaning.

 

  • Two and three panel configurations
  • Sizes up to 72″ x 60″  (two panel) and 108″ x 60″ (three panel)
  • All sizes built-to-order with no extra cost or lead time
  • Triple-layer/dual-cavity suspended coated film glazing in low and high solar heat gain performances
  • Industry-leading air and water-tight seals
  • Removable sashes for easy cleaning
  • Engineered for new construction and retrofit/replacement projects
  • Attractive die-cast sweep locks and durable tubular fiberglass pultrusion for security and durability
  • Full Lifetime Warranty

Painted Finishes:

Alpen factory finishes are specially blended for excellent adhesion, abrasion resistance and hardness on fiberglass materials, ensuring Alpen windows will maintain a long-lasting beautiful finish.

Alpen double hung fiberglass windows are available in 5 beautiful, durable colors, or any custom color or split finish/two tone combinations.

Alpen Paint Colors DH-SH-XO

 

 

 

Alpen’s use of a weightless center pane to create triple-pane performance allows us the unique advantage of having higher interior glass surface temperatures during NFRC design “winter” conditions.  Higher interior glass surface temperature means less condensation and more comfort.

Heat Mirror Technology

 

Performance Options:

Alpen’s double hung windows are available in multiple performance series glass options, in low and high solar heat gain configurations.

After creating hundreds of industry-leading performance glass configurations, we’ve selected our most popular high and low solar heat gain glass types for use in our standard window lines.

Click here for new NFRC Certified performance data for all of our window and glass options.

 

 

Obscure Glass Options:

Obscure glass

Hardware

Attractive zinc die-cast sweep locks and optional lift handles provide durability, easy of use and style.

Locks and lift handles available in 5 beautiful painted finishes and 3 decorative metal upgrade options:

Alpen Hardware Colors DH-SH-XO

Simulated Divided Light Grids

Simulated divided lights create classic style without sacrifice of thermal efficiency.  Choose from 3 grid profiles and dozens of customizable patterns.  Grids are painted to match window frame or in color of your choice.

Aluminum Exterior Extrusions and Brickmolds