WeatherLok Series 3201

Double Hung, Sliders, and Picture Windows

Innovation & Value

The Series 3201 is the union of superior energy-efficiency and engineering, and elegant styling. You'll enjoy the practical benefits of vinyl and the aesthetics of WeatherLok workmanship and design.

Standard Features

  • Reinforced, multi-cavity construction provides additional thermal performance and structural integrity.
  • Insulated glass panels with optimum thermal air space featuring Warm-Edge Spacer System.
  • Fusion-welded sashes and frame add strength, boost thermal performance.
  • Constant force coil balance permits easy sash movement.
  • Positive-action cam lock enhances safety.
  • Half-screen supported by a strong extruded aluminum frame.
  • Sloped sill reduces air infiltration and allows for easy water runoff.
  • Rubber bulb seal helps block outside air.
  • Heavy-duty, push button night latches provide optimum ventilation.
  • Interlocking sashes keep out drafts.
  • Dual-fin weather stripping further reduces air infiltration.
  • Integrated, slim line push rail allows you to easily operate sash.
  • 3 1/4" jamb depth


  • InsulKor™ multi-cavity foam-filled frame
  • Factory mulling
  • Full screen
  • 5/8" or 1" contoured grid
  • 3/4" or 5/8" flat or diamond grid
  • Double strength glass
  • Low-E glass with Argon Gas
  • Obscure glass
  • Low-E glass
  • Lifetime glass breakage warranty
  • Ultra Low-E Argon (May be required for Energy Star rating)
  • Today's nine most popular painted exterior colors (on white interiors).


Slider Windows

Series 3201 sliding windows offer the same stability, efficiency and design features of Series 3201 double hung windows, plus:

  • Tandem rollers ride easily along friction free glide channel
  • Integrated glide rail for easy sash opening and closing
  • Available in 1/4 - 1/2 - 1/4 or 1/3 - 1/3 - 1/3 configurations
  • XO or OX 2-lite styles available
  • Half screen comes standard
  • 31/4" jamb depth

Proud of our Products. 
Proud of our People.

Watch this video for a tour of our world class manufacturing facility in action.

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