What is a double-hung window?

The double-hung window style has two sashes that operate vertically for ventilation from either the top or bottom of the window unit. Both sashes may tilt in for safe and easy cleaning from inside the home. Balancers counter the weight of the sashes to provide easy operation and to allow the sashes to remain open in any position.

All Window Source double-hungs come standard with:double-hung-300x300

  • Multi-chambered premium vinyl frames
  • Fusion welded vinyl sash and main frames
  • Both sashes tilt in for safe and easy cleaning
  • Double insulated glass IG units
  • Warm edge spacer technology
  • Spring loaded vent latches
  • Equal lite sashes
  • Half screens
  • Custom-made to fit each opening
  • Limited Lifetime warranty

Our Most Popular 6000 Series Double-Hung Windows


Many homeowners upgrade to our popular 6000 Series double-hung window line. The 6000 series comes standard with more vinyl, more strength, double strength glass, a true slope welded sill and the Clarity mesh screen. For just a few dollars more, it is your best value.

6000series6000 Series Features

  • Multi-chambered 3 1/4 inch vinyl frames
  • Fusion-welded sashes and mainframes
  • Both top and bottom sashes tilt in for cleaning
  • Warm edge spacer system
  • Double insulated glass
  • Extruded aluminum half screens
  • Double strength glass option
  • Clarity mesh screen option
  • Interlocking meeting rail
  • Welded true slope sill
  • Meets Energy Star when ordered with LowE glass
  • Limited Lifetime Warranty

Our Highest Performance 9000 Series Triple-Pane Double-Hung Windows


The 9000 series is our highest performance window line. Triple glass and foam filled frames give you the ultimate in comfort and energy savings. The triple glass package in the 9000 series features two coatings of high performance LowE and two chambers of Argon gas fill. The result is a highly efficient replacement window with an incredible NFRC U-factor of .22. With the 9000 series you’ll be prepared for ever rising energy prices. We have seen similar products offered for more than twice as much. Why pay more?

9000series9000 Series Features

  • Multi-chambered 3 1/4 inch vinyl frames
  • Fusion-welded sashes and mainframes
  • Warm edge spacer system
  • 7/8 inch triple insulated glass
  • Foam-filled frames resist heat and cold transfer
  • Double strength glass option
  • Two layers of LowE/Argon option
  • NFRC U-Factor of .22 option
  • Extra heavy duty beveled frames
  • Clarity mesh screen option
  • Welded true slope sill
  • Decorative recessed locks
  • Limited Lifetime Warranty