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Double-Hung Windows in Rockford, IL

Our 4000 and 6000 series of double-hung windows are the ultimate choice for beauty, comfort and energy efficiency.

Our Most Popular Replacement Window
Add Classic Style To Your Home
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Product Details
Color Options

When it comes to installing double-hung windows in your home, look no further than Window World of Rockford. They boast incredible features:

  • Convenient operation enhances this attractive, traditional window style
  • Easy to clean with tilt-out upper and lower sashes
  • Versatile with many size and design options

Double-hung window colors to meet your specific taste.

Color Options

*Color options may vary based on package, dimensions and more.

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Double-Hung Series

4000 Series Double-Hung

4000 Series windows from Window World are a classic option. With a beveled mainframe design, their sleek, slim look complements any home. The frames are made of virgin vinyl, meaning they’ll never chip, peel, crack or warp. These windows help to pay for themselves through lower energy costs, lo maintenance, and increased property value.


  • Reinforced narrow silhouette frame and sash profiles
  • Composite meeting-rail reinforcement allows for secure mounting of hardware
  • End-of-throw cam shift locking delivers increased strength and protection to the recessed lock
  • Smooth and uniform true sloped sill quickly directs water runoff, keeping the exterior of the window clean and attractive
  • Telescoping sill dam provides protection from air and water infiltration, increased structural stability and enhanced beauty
  • Innovative screen bulb seal creates a snug fit that eliminates light and insect penetration between the screen and frame

6000 Series Double-Hung

The superior performance of 6000 series windows starts with innovation. Every precision-engineered component contributes to superior energy savings. The multi-chamber design helps trap dead air to produce an effective insulating barrier, while extra-thick, fusion-welded frames and sashes provide superior structural strength and create a permanent barrier against air and moisture infiltration, adding up to greater energy savings and lower utility bills.


  • Quad 4 weatherstripping at the header
  • Triple-barrier weatherstripping between sash and jamb
  • Compression bulb seal at the sill for further weather protection
  • Hidden screen track produces clean lines
  • Fully extruded lift rails for strength & durability
  • Fusion-welded sash & mainframe adds strength and rigidity
  • Sloped sill helps to prevent air and water infiltration while maintaining a timeless, detailed appearance
  • Beveled mainframes complement any home style

What is energy efficiency?

Energy-Efficient Windows

If you’re looking for new ways to improve your home’s energy efficiency, look no further. Energy-efficient replacement products help lower your energy bills, while keeping your home more comfortable year round.

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Your Questions, Answered

Double-Hung Windows FAQs

What are double-hung windows?

With traditional single-hung windows, only the bottom sashes move. Double-hung windows allow both the top and bottom sashes to open and close, allowing you to customize the ventilation.

Are double-hung windows energy efficient?

Yes! Save on heating and cooling costs year-round with the SolarZone™ TG2 Elite™ insulated glass package. In warm weather, it will reduce solar heat accumulation, minimize interior glare and lower interior glass temperature. In cool temps, it delivers outstanding thermal performance and warmer interior glass surfaces to maintain comfort in the winter. This package also meets all ENERGY STAR requirements.

What are the size dimensions of double-hung windows?

Our double-hung windows are built to fit your home’s specific measurements. Contact us to learn size specifications of our different models.

Does this window style provide long-lasting durability?

Yes! When extreme wind and weather hit, our proprietary sill interlock stands strong. Traditional slope sill designs can allow the sash to bow during powerful winds, but with our interlocking sash-to-sill technology, the sash is channeled firmly into the window frame for a unified wall of strength.

5-Star Google Ratings

What Your Neighbors Are Saying

Great cost and an excellent product! Everything- from the representative to the installation—has been a pleasure. Our windows were installed very quickly, by a friendly, efficient, and clean crew. We may be replacing our doors soon, and Window World of Rockford will be one of our first calls.
Patrick S.
Very good experience with replacement of 3 front windows. On time arrival, fast completion and they look great!
Gail F.
Our overall experience was wonderful! It’s evident to us that they take great pride in their work and are a great reflection for the company’s reputation! We are also very happy with the windows we had installed and can already tell a difference in the heating/cooling! Also our salesman, Ed was very professional and took great care in measuring and making sure we were going to be satisfied with our purchase! Thank you Window World of Rockford.
Lisa & Ken W.

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