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Double-Hung Windows in Long Island

Our 4250, 4500 and 6500 series of double-hung windows are created especially for superior performance and energy efficiency year-round.

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

Double-hung windows are a classic style that marry appearance and functionality. Energy efficient and customizable to match your decor, you’ll love these windows. Their appeal:

  • Heavy-duty vinyl construction for superior durability
  • Unmatched thermal protection from high-density foam throughout the mainframe
  • Heavy-duty weatherstripping and interlocking sashes provide protection from the elements
  • Full-length, integrated lift rails for easy opening and closing

Double-hung window colors to meet your specific taste.

Color Options

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

double-hung window product accreditations

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Double-Hung Series

4250 Series Double-Hung

Energy-efficient options and a variety of stylish design choices offer numerous opportunities to customize Window World’s 4250 Series replacement windows to suit your needs. Choose to upgrade with our SolarZone™ glass packages to help improve thermal performance and reduce energy costs. A variety of operational configurations gives you the ability to select the window style that will make the most of your home.


  • Welded, heavy-duty vinyl construction provides superior strength and durability
  • Multiple hollow chambers in the mainframe seal air spaces for an effective insulating barrier
  • High-density foam throughout the mainframe enhance structural and thermal performance
  • The beveled exterior edge adds style and curb appeal
  • Dual- and triple-pane insulating glass seal air space between the panes enhanced by our Duralite® warm-edge spacer system
  • Metal reinforcements at the meeting rail add further stability
  • Recessed, opposing cam locks secure window without interrupting sight lines
  • Heavy-duty weatherstripping and interlocking sashes
  • Recessed tilt latches can be released to tilt both top and bottom sashes for easy cleaning
  • Balance channel covers help achieve a polished look
  • Push-button vent latches allow for optimal ventilation
  • Welded combination sill featuring a deflection leg enhances rigidity and a five-degree slope directs water away from the home and eliminates unsightly weep holes
  • Full-length, integrated ergonomic lift rails provide convenient, easy operation. Bevel on bottom rail makes gripping easy
  • Detent clip keeps the top sash from drifting while an inverted-coil balance system ensures both sashes will stay in place
  • An easily removable latching half screen featuring Clarity® mesh

4500 Series Double-Hung

Popular in homes of every style, Window World’s 4500 Series Double-Hung Windows showcase style and value. The beautifully contoured design of the rugged vinyl frame blends with traditional to contemporary homes, and virtually all styles in between.

Widely loved for their dual operable sash that tilt in for easy cleaning, this series offers exceptional functionality. Made of premium vinyl that will never fade, and including features like vent latches and constant-force balance systems, these windows provide dependable performance year after year.


  • Multi-chambered vinyl profiles increase strength and thermal performance
  • Dual-paned 3/4″ insulated glass units are available with SolarZone™ glass
  • Glass penetrates sash 1/2″ to keep edges warmer
  • Frames and sash are welded at mitered corners for lifetime dependability
  • The sloped sill design prevents water from pooling during heavy rains
  • Multiple weather seals at various points around each sash reduce drafts
  • Closed-cell foam sill bulb reduces water infiltration

6500 Series Double-Hung

Window World’s 6500 Series Double-Hung Windows are precisely engineered for superior energy savings. Built to last, our vinyl frame design replicates a wood appearance but is virtually maintenance free. With two operable sashes, this series is cleaned easily from inside the home for the perfect combination of style and efficiency. Also, warm-edge technology is achieved efficiently from optimum-sized insulating glass units and a unique spacer design.


  • Vinyl construction of the frames and sashes which are welded at mitered corners
  • Frame profiles feature divided chambers for high thermal performance and added rigidity
  • Double- strength insulating glass unit is 3/4” – the optimum size for dependable energy efficiency
  • Standard SolarZone™ glass enhances energy performance
  • Glass edges are positioned 1/2” into the sash to help maintain even temperatures
  • U-channel spacer design is more thermally efficient than traditional box spacers
  • Meeting rails interlock around dual lines of weatherstripping which guard against drafts
  • Sloped sill designs prevent water from pooling during heavy rains
  • Multiple weatherseals around each sash reduce drafts
  • Water penetration is blocked due to a closed-cell foam barrier seal located at the sill
  • Windows can be held in any open position because of a coil spring balance system
  • Lift rails are molded into the sash and will not loosen or break off
  • Vent latches allow for ventilation without opening the sash fully

What is energy efficiency?

Energy-Efficient Windows

Your windows are a big factor in your home’s energy performance. If your windows aren’t energy-efficient, they’re probably costing you money. Learn more and discover how much energy-efficient products could save you every month.

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Your Questions, Answered

Double-Hung Windows FAQs

What are double-hung windows?

This classic window style allows for both the top and bottom panes of the window to move up and down, operating independently. Reinforced narrow silhouette frame and sash profiles make a statement of style with their low-profile design. The result is a beautiful and expanded glass area. At the same time, internal chambers increase structural integrity, rigidity and energy efficiency.

Are double-hung windows energy efficient?

Yes! Our windows are ENERGY STAR-certified and equipped with low-E glass, to reduce solar heat gain and keep your interior temperatures more consistent and comfortable. Other energy-saving features include insulating gas between panes and a warm-edge spacer system.

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.

How do you clean double hung windows?

Double hung windows from Window World are made with tilt-in sashes. This means both the top and bottom sashes can be tilted inwards to make it easy to clean both the interior and exterior of your windows.

To do this, you’ll want to follow these steps:

  • Unlock and raise your window about 2”.
  • Move the wash assist tabs so they’re between the sash and the frame.
  • Carefully pull the lower sash towards you and rest it on another object for support (be sure not to tilt it more than 90 degrees).
  • Next, you’ll want to lower the upper sash. To do this, slide the tilt latches to the top and lower the top window sash, leaving an inch or more of space between it and the lower sash.
  • Push the tilt latches inwards and tilt the upper sash inwards towards you, and rest it carefully on the lower sash.

Follow these instructions, and you’ll be able to properly clean and care for each and every crevice of your double hung windows.

What is the difference between single and double hung windows?

Both single hung and double hung windows have window sashes that slide vertically. On single hung windows, only the bottom sash can slide, while the top sash is fixed and static. On double hung windows, both sashes can slide as desired.

How are double hung windows installed?

All Window World double hung windows are installed by our factory trained installation team. This includes properly setting, leveling and caulking to ensure your new windows are a perfect fit. Find out more about our window installation process.

How do you open double hung windows?

For double hung windows, both sashes can slide and allow the window to open. To open the lower sash, simply unlock the sash and slide it upwards. To open the upper sash, you’ll need to unlock your lower sash, and gently lower the upper sash to your desired position.

How do you lock double hung windows?

To lock your double hung window, it’s important to check the alignment of your locks. Make sure that your upper sash is pushed all the way up and your lower sash is pushed completely to down so they’re fully sealed. This will allow your locks to be secured without any obstructions.

Are double hung windows energy efficient?

Yes! All Window World double hung windows are ENERGY STAR® Certified. Our windows are constructed with Low-E glass, warm-edge spacers, and insulated vinyl framing, all designed to optimize your window’s energy efficiency. Find out more about the energy efficiency of Window World windows.

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What Your Neighbors Are Saying

I ordered a whole house of windows from Window World. Products were delivered and installed when they said they would be. Great customer service. All the girls in their office were great and returned calls when they said they were going too. I have already put in my next order for a whole house of siding. Can not wait until its complete. Then I will be having my shed and fencing done from them. Wonderful company! Love the lifetime warranty.
Helen T.
It was a pleasure having our windows installed by Window World. Their prices are very reasonable and their work was neat, clean, and started and finished when promised and we are very pleased with the results. They installed 13 windows (2 that were new installs and had to be cut and fit not just replace a 6 foot sliding glass door that also had to be cut and framed. All done in 2 days by 2 men. AMAZING.
George M.
If you get overwhelmed with multiple quotes and sales pitches, give this company a chance and definitely visit the showroom. Installation team was thorough, fast and efficient. Finished the whole house windows replacement in one day. There are more expensive companies but with this one you really get the best value for your money.
Vitali H.

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