Series 8100

Our Series 8100 line of replacement windows is a cost-effective choice and offers the standard options you’d expect from a durable, high-quality window. With state-of-the-art fusion welded frames, our Series 8100 windows prevent air, water and noise infiltration keeping your home comfortable all year long. Each window offers factory applied wrap-around foam, optional Low-E glass for energy efficiency and a transferable, limited lifetime warranty.

Features & Benefits

  • Choice of Single Hung, Slider or Picture Window Styles
  • Cost-effective replacement window
  • Single hung bottom sash tilts in for easy cleaning
  • Factory applied wrap-around foam
  • Single Hung DP 50 rating (window size tested 36” x 74”)
  • 2-Lite Slider DP 30 Rating (window size tested 72” x 48”)
  • Picture Window DP 50 Rating (window size tested 72” x 72”)
  • Transferable, limited lifetime warranty
Where To Buy
Series 8100 Single Hung Window Product Shot
Series 8100 Tilt Single Hung
Almond 2 Lite Series 8100 Sliding Window
Series 8100 Horizontal Slider
Series 8100 Picture Window Product Photo
Series 8100 Picture Window

Energy Efficient Glass Options

Energy Star Program LogoAtrium windows and doors are engineered with state-of-the-art glass technology to give you outstanding thermal efficiency. With a full range of glass options and special insulated spacers, we have a glass package to fit any climate need or budget. Verify product specifics before ordering.

Low-E Glass

Low-E glass is coated with a microscopic layer of silver that reflects radiant solar energy while permitting visible light to pass through the glass, providing more comfort and lower energy costs.

Low-E Glass and Argon Gas

Argon gas works like an insulating blanket between two panes of glass to further improve thermal eciency and decrease outside sound levels.

Ultra Low-E Glass and Argon Gas

Choose our ultimate glass package for optimal energy efficiency and maximum cost savings. Ultra Low-E glass offers three invisible layers of silver coating in addition to the superior thermal performance of argon gas.

Vinyl Color Options



Device/Monitor screen settings may affect color shown. Please refer to actual window sample when selecting colors. Only use mild, water based household cleaner on painted product and rinse immediately with water. See full cleaning instructions for details.

Available Grid Patterns

Colonial (SH)

Colonial Top Sash Only (SH)

Vertical (SH)

Vertical Top Sash Only (SH)

Diamond (SH)

Diamond Top Sash Only (SH)

Prairie (SH)

Prairie Top Sash Only (SH)

Perimeter Prairie (SH)

Valance (SH)

Colonial (PW)

Vertical (PW)

Diamond (PW)

Prairie (PW)

Valance (PW)

Colonial (SL)

Vertical (SL)

Diamond (SL)

Prairie (SL)

Valance (SL)

Available Grid Types

1-Inch Contoured Grid

3/4-Inch Flat Grid

5/8-Inch Contoured Grid

5/8-Inch Flat Grid

Available Series 8100 Models

Atrium Product Specifications

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Atrium Installation Instructions & Videos

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Become An Atrium Distributor

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Windows 101 Video Series

Enjoy our collection of animated educational videos covering a variety of topics including condensation, window styles, window options, warranties, window/building codes and more.

Browse Windows 101 Videos