Double-Hung Windows in Rockford, IL

4000 Series windows from Window World are beautiful as well as remarkably solid, sturdy and stable. Our beveled mainframe design is exceptionally slim and refined. Their sleek construction easily complements any type of architecture. Plus, they’ll never chip, peel, crack or warp, and are maintenance free—their tilt-in sashes make cleaning a pleasure. These windows help to pay for themselves through lower energy costs, freedom from maintenance and increased property value.

Features

• 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

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.

Features

• 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

This classic window style allows for both the top and bottom panes of the window to move up and down, operating independently.

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.

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

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.