Double-Hung Windows in Pittsburgh, PA

Window World of Pittsburgh offers two series of the widely popular, classic-looking double-hung window: the 4000 and 6000 series.

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

Double-hung windows are our most popular style for a reason: they not only increase your curb appeal, they’re low maintenance and built to last for years to come. More benefits and features:

  • Convenient operation and an attractive, traditional 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.

double-hung window product accreditations

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Low-E Glass

Low-E glass is brilliantly engineered to minimize the amount of UV rays and unwanted temperatures in your home in all climates.

Warm-Edge Spacer

Intercept’s™ Warm-Edge Spacer insulates the exterior edges of a sealed unit and can tack on 5% savings on monthly energy costs.

Vinyl Framing

Vinyl window frames are constructed with a complex array of compartments internally to help trap and repel unwanted weather.

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Double-Hung Series

4000 Series Double-Hung

4000 Series Double Hung

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. You will find that 4000 Series vinyl frames will never chip, peel, crack or warp, and are maintenance free. The 4000 Series tilt-in sashes make cleaning a pleasure due to our effortless tilt latch. The ultimate choice for beauty, comfort and energy efficiency. The 4000 Series windows help to pay for themselves through lower energy costs, freedom from maintenance and increased property value. Our impressive Lifetime Limited Warranty* delivers the peace-of-mind you would expect from an industry leader.

4000 Series Features

Best-in-Class Performance Features:

  • 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.
  • Composite meeting-rail reinforcement allows for secure mounting of hardware; the non-conductive material helps reduce the transfer of energy.
  • End-of-throw cam shift locking delivers increased strength and protection to the recessed lock. It also includes an “unlocked” indicator.
  • The smooth and uniform, true sloped sill quickly directs water runoff without the use of weep holes, keeping the exterior of the window clean and attractive.
  • Our telescoping sill dam delivers a triple payoff: protection from air and water infiltration, increased structural stability and enhanced beauty.
  • When extreme wind and weather hit, our proprietary sill interlock stands strong. Traditional sloped 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.
  • Our innovative screen bulb seal creates a snug fit that eliminates light and insect penetration between the screen and frame. It also aids in easy screen installation and removal.

Additional Sliding Window Features:

  • Sashes glide horizontally for easy opening and closing.
  • Both sashes lift out for convenient cleaning.
  • Nylon-encased dual brass roller system for smooth gliding performance.

Insulated Glass Packages to Meet Your Needs.

Maximize your energy savings by choosing a high-performance SolarZone™ insulated glass† package to meet your specific climate challenges. The lower the U-Value, the less energy you’ll need to heat your home. The lower the Solar Heat Gain Coefficient (SHGC), the more you’ll conserve on air-conditioning.

Thermal Performance Comparison4
Double-Hung Sliding
U-Value SHGC U-Value SHGC
Clear Glass 0.46 0.59 0.45 0.59
SolarZone 0.29 0.30 0.28 0.30
SolarZone ThermD Elite 0.27 0.21 0.27 0.21
SolarZone ThermD iE 0.27 0.30 0.27 0.30
4Whole window values are based on double-strength glass, standard 4000 Series offering with
composite reinforcements. ST and HP performance values are also available.
Air/Water/Structural Results
Air/cfm Water/psf Structural
Window World 4000 0.4 6.0 DP40

6000 Series Double-Hung

6000 Series Triple Pane

Featuring the same slim frame as the 4000 Series Double Hung, the 6000 Series Triple Pane window maximizes energy savings. Triple-pane glass systems deliver an added layer of protection to block energy loss. Their precision-engineered construction features a 1″ thick glass unit, three panes of single-strength glass, two surfaces of Low-E (low-emissivity) technology, two spaces of argon gas, along with the SolarZone ThermD Intercept® Stainless Steel Spacer System for an ultra-efficient energy-saving shield. This thermally optimized glass system provides a more balanced, comfortable indoor climate, while also reducing outside noise. Best yet, 6000 Series windows are covered by Window World of Youngstown’s impressive Lifetime Limited Warranty for complete peace-of-mind.

  • Argon is an insulating gas between the glass panes that acts as a thermal barrier on energy loss, counteracting heat and cold conduction.
    Argon gas also helps block noise infiltration for a quieter indoor climate.
  • Low-E Glass insulating technology features a virtually clear, metallic
    coating that acts as a thermal mirror to help keep warm air in during
    the winter and solar heat out during the summer. Low-E also filters out
    damaging UV rays that can cause furnishings and carpet to fade.
  • SolarZone ThermD Intercept Stainless Steel Spacer features a
    unique, one-piece U-shaped design that stabilizes the panes of glass
    and creates a powerful thermal barrier. Stainless steel is impervious to
    gas transmission and withstands the effects of temperature changes,
    thus increasing gas retention and alleviating stress on the sealant bond
    to help prevent seal failure.

Advanced Triple-Pane Thermal Protection.

Comparing one glass system to the next can help you determine the best glass for
your home and climate challenges. In the table below, U-Factor represents the rate
of heat flow through the window product – the lower the U-Factor, the less energy
is needed to heat a home. The SHGC (Solar Heat Gain Coefficient) represents
the solar heat penetrating through the window – the lower the number, the more
you’ll conserve on air-conditioning use. Window World 4000 Series Windows with
SolarZone ThermD TG2 glass technology are 52% more energy-efficient than clear
double-pane glass windows.


Thermal Performance Comparison
Composite Reinforcement
U-Factor SHGC
Clear Glass 0.46 0.59
SolarZone ThermD TG2 0.22 0.26

SolarZone ThermD Elite TG2

0.22 0.19

Double Hung 6000 Window Technical Details

  • Vinyl frames and sashes will never chip, peel, crack or warp, tough and solid with virgin vinyl with color is formulated throughout so the beautiful luster lasts.
  • Airtight insulating chambers help reduce conduction and cut high energy bills.
  • Quad 4 weatherstripping at the header adds even more protection from the elements.
  • Insulated glass unit with optimal air space improves year-round performance.
  • PPG Interlock™ Warm Edge Spacer System maximizes window performance and Longevity.
  • Interlock at sash meeting rails create a super-tight seal against air infiltration,providing security, comfort and well-being.
  • Metal reinforcement adds strength at the meeting rails.
  • Drop-in glazing provides energy efficiency as well as interior aesthetic appeal.
  • Compression bulb seal at the sill creates an all-season weather barrier.
  • Sloped sill ensures quick water to drainage to the exterior.
  • Hidden Screen track produces clean lines and added beauty.

What is energy efficiency?

Energy-Efficient Windows

Whether you’re looking to lower your energy bills or improve your home’s energy performance, energy-efficient windows can help. Learn about the science behind it and discover the benefits of making the switch.

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Your Questions, Answered

Double-Hung Windows FAQs

What are double-hung windows?

Double hung windows feature top and bottom panes that move up and down, operating independently of each other.

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! 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.

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.

5-Star Google Ratings

What Your Neighbors Are Saying

The 3 man crew worked non stop starting with the 3 double hung windows on the 2nd floor. They then moved on to a large casement and picture window that we had them to convert into 2 large double hung windows. The final window was an old box bay window that we wanted removed. They removed the bay and replaced it with 2 large double hung windows. It was not an easy job but they worked through it and made sure it was done correctly.
Michael J.
I could not be more pleased with my windows. The crew arrived on time and got to work immediately. These windows are beautiful and the installation was seamless. We had 10 double hung windows installed. The crew was excellent and even assisted me in moving back the furniture. You would not go wrong in choosing Window World for your window installation. And when they say no pressure – they mean it!
Mary W.
Starting with the salesman, to being kept informed by Window World staff, to the two expert installers that put eight windows in my house/professional from start to finish. Took about 8 weeks. The triple pane windows look great!!
John C.

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