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Expires: 09/15/2026
$100 Off All Vinyl Windows!
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Double-hung windows are our most popular style for a reason: they deliver timeless curb appeal, superior ventilation, and incredible energy efficiency.
At Keystone Window, we’ve perfected the double-hung window to solve the problems homeowners hate—drafts, high energy bills, and difficult cleaning—all in one beautiful, low-maintenance package.
Effortless Cleaning: Both the top and bottom sashes tilt inward, allowing you to easily clean the exterior glass from inside your home. No more ladders, no more dangerous reaching.
Superior Airflow: Unlike single-hung windows, you can open both sashes at once. Lower the top sash to let warm air escape and raise the bottom sash to draw in cool, fresh air, improving your home’s comfort naturally.
Timeless Design: Their classic, elegant look enhances any home, from traditional colonials to modern new constructions.
Every double-hung window we install is ENERGY STAR-certified and packed with technology designed to cut your costs:
Insulated Glass Technology: Our standard windows feature Low-E glass and Argon gas sealed between the panes. This advanced system reflects summer heat, blocks damaging UV rays, and keeps your home’s warmth from escaping in the winter.
Airtight Vinyl Frames: The durable, fusion-welded frames eliminate drafts and muffle outdoor noise, creating a quiet and consistently comfortable interior.
For over 20 years, homeowners across Southeastern PA have trusted us for our honest, gimmick-free approach. We provide premium, custom-fit windows that are built to last. Choose from a range of bold exterior colors like Crème, Tan, Cocoa, Black, and Bronze, and let us help you find the perfect match for your home.
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Unlock Elevated Comfort and Style: Embrace Our Double-Hung Window
This innovative Low-E (low emissivity) technology transforms the performance of your windows, offering benefits that go beyond traditional glass. Here’s why it’s a smart choice for any home:
Optimal Energy Efficiency: Reflects infrared heat in summer and retains warmth in winter for a more consistent indoor temperature, reducing energy use and increasing overall energy efficiency.
UV Ray Protection: Helps block harmful UV rays that can fade furniture, flooring, and interior décor—an ideal solution for homeowners looking to preserve their space.
Glare Reduction: Filters intense sunlight to reduce glare without sacrificing natural light, keeping your interior brighter and more comfortable.
At Keystone Window of Pennsylvania, we believe in honest pricing and clear communication. When you choose our double hung windows, you’ll get the total cost upfront—no games, no surprises.
Every replacement double-hung window we install includes full installation by our Installation Masters-certified crews. Proper window installation ensures long-term energy efficiency, smooth sash operation, and protection against air leaks, making it a key part of your window’s performance.
Your windows should match your home, not the other way around. We offer a wide range of exterior color choices, including brick red, Hartford green, tan, black, white, and more.
Every home is different, which is why we offer custom replacement window sizes beyond standard dimensions to ensure a perfect fit.
Our double-hung vinyl windows include a transferable lifetime warranty that protects your investment and adds long-term value to your home. Designed for durability, energy efficiency, and low maintenance, they’re a smart, worry-free upgrade trusted by homeowners across Southeastern PA.
At Keystone Window of Pennsylvania, we build our double-hung vinyl windows to outperform the competition—delivering the best choice in energy efficiency, durability, and curb appeal.
Our Keystone Window of Pennsylvania windows are equipped with Vent Stop, a feature that limits sash travel yet allows for ventilation when activated. This useful feature keeps a window from being forced open while still allowing a fresh breeze to come in.
Our double-hung windows come standard with Low-E glass, reflecting heat and blocking harmful UV rays to protect your interior and lower utility bills.
We fill the insulated glass units with argon gas, not air, to reduce heat transfer, minimize condensation, and improve year-round energy efficiency.
Our vinyl replacement windows exceed AAMA standards using advanced weather stripping, airlocks, and tight seals to prevent drafts and improve comfort.
These features enhance comfort, security, and performance, giving homeowners more reasons to upgrade with Keystone.
Always compare AAMA air infiltration ratings of any windows you’re considering purchasing. Poorly designed windows don’t have the built-in airlocks, weather stripping, and barriers necessary to keep air from forcing its way in. Without these design features, air will push between the sash meeting rails and around the sash perimeter where it meets the frame and sill. The last thing you need is a breeze coming through your closed window.
Energy Star Certified: Our glass packages are energy efficient, reduce noise, and block UV damage.
U-Factor: Our double hung windows rate as low as 0.19 (industry standard is 0.30); lower means better insulation.
Solar Heat Gain Coefficient: Lower ratings block more solar heat, keeping your interior cooler in summer.
Visible Transmittance (VT): Higher VT means brighter rooms and greater energy efficiency.
Condensation Resistance: Higher scores help prevent fog and extend window performance.
Dual-Fin Wool-Pile weatherstripping surrounds each sash, reducing air infiltration and helping your double-hung windows maintain a tight seal.
If you’ve ever tried to close a double hung window, but couldn’t get it locked, you’ll really appreciate this window feature. The Full Composite Reinforcement in the keeper rails ensures that you’ll be able to close the windows and lock them easily without fighting with them. The reinforcement also means maximum structural performance, so the meeting rails won’t sag. All keeper and lock screws are fastened into metal, not plastic. This makes our windows easy to lock tight, which helps keep your home safe.
You will be amazed at how easily our double hung windows move up and down. Our Constant-Force Balance system is an AAMA Class 2 device that provides smooth and easy operation. The 1/2” stainless steel never needs lubrication or adjustment, making this window easy for you to use throughout its lifetime.
Your windows’ Cam-Action Locks will pull the sashes together, tightly sealing them to prevent air infiltration. When engaged, the lock increases the safety of you and your family by making the window much more difficult to be forced open.
The sashes and frames in all of our windows are made using the finest quality, specially blended, un-plasticized poly vinyl chloride, or uPVC. Unlike wood or metal windows, your vinyl window frame will never rot or corrode. uPVC saves energy better than other materials, so it helps to reduce your household’s carbon footprint. In addition, it lasts much longer than wood or other materials, and never needs refinishing (so there’s no need to use environmentally harsh varnishes or stains.) This inherent durability means that the likelihood of having to replace your uPVC windows again in the future is much less than if you were to use wood or metal.
We also fusion-weld the vinyl with top-of-the-line, robotic 4-point welding equipment to seal the corners of our windows. Fusing the vinyl ensures that the corners will never separate. Many low-quality vinyl windows today are simply screwed or stapled at the corners, just like wood or metal windows. Some are welded on very old, single- or double-weld machines. The corners of those windows can separate, and leak air and water. When choosing the best window for you, only purchase a window made with fusion-welded vinyl produced with robotic, 4-point welding equipment.
Multi-chambered sash and frame vinyl extrusions increase durability and insulation of the window. In addition, the chambers have fiberglass insulation inserts to make an even more energy efficient window.
We offer flat and contour grids in a variety of designs, colors and woodgrains. Now you can add style to your vinyl windows like never before!
Your screens will be durable and easy to look through with strong, extruded metal screen frames featuring unobtrusive black fabric and matching black spline.
Your choice of colors in the Keystone Window include Crème, Tan, Cocoa, and Bronze, and many more custom paints too.
FAQ: Everything You Need to Know About Double-Hung Windows
A double-hung window features two operable sashes—both the top and bottom open and tilt in for easy cleaning and year-round ventilation. At Keystone, our vinyl double-hung windows add long-term comfort, fresh air, and modern performance to any room.
Single-hung windows only open from the bottom, while double-hung windows open both sashes, offering more airflow, easier maintenance, and improved functionality. Keystone’s double-hung design makes it the best choice for flexibility and energy efficiency.
Absolutely. Keystone double-hung windows feature Low-E glass, argon gas fill, and insulated vinyl frames—all Energy Star® certified. These energy-saving details help reduce utility bills and increase indoor comfort.
Some older hung windows may be drafty or hard to clean. Keystone eliminates those issues with fusion-welded frames, constant-force balances, and dual-fin weatherstripping for smooth, secure, and efficient operation.
Costs depend on size, upgrades, and design options, but Keystone always provides upfront, all-in pricing. No hidden fees—just a transparent, no-pressure quote that helps you plan your project with confidence.
Yes—Keystone double-hung windows are suitable for bedrooms, dormer windows, and tight spaces where airflow and easy access matter. Their classic design also matches a wide range of interior and exterior styles.
We offer custom sizes, grid styles, and hardware, along with popular exterior colors like black, white, tan, and Hartford green. Keystone makes it easy to match your aesthetic and project needs.
Keystone’s vinyl windows are stronger, more energy efficient, and far more low maintenance than wood or metal. Plus, our fusion-welded corners and UPVC construction deliver lasting durability without the upkeep.
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