Casement Windows

Expires: 11/15/2026

$100 Off All Vinyl Windows!

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At Keystone Window, we design our casement windows for homeowners who want maximum fresh air, wide-open views, and serious energy efficiency. Hinged at the side to crank outward, they provide top-to-bottom ventilation and create an airtight seal when closed—making them one of the most secure and efficient styles you can choose.

Backed by two decades of serving Southeastern Pennsylvania, we deliver ENERGY STAR® certified windows that combine lasting performance with timeless design.

Every project includes our transparent, upfront pricing, professional installation by certified experts, and is protected by a transferable lifetime warranty.

Certifications

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Window Features

Discover why our casement windows are the ideal choice to enhance your home's comfort and style.

Unobstructed Views & Superior Airflow
Hinged at the side, our casement windows crank open completely for top-to-bottom ventilation, providing an uninterrupted view and making them perfect for any space.
Enhanced Security with Multi-Point Locking
A single, easy-to-use handle operates a powerful multi-point locking system, securing the window at multiple points along the frame for an exceptionally tight seal and enhanced security.
ENERGY STAR® Certified for Lower Bills
Every window meets or exceeds ENERGY STAR® standards. Our combination of insulated frames and advanced glass options like Low-E coatings reduces heat transfer and lowers your heating and cooling costs year-round.

Elegant Wood Interiors & Custom Hardware
Add natural warmth and beauty to your home with real wood interior finishes like pine, white oak, or cherry, and complement them with stylish hardware in finishes like bronze or antique brass.
Airtight Seals for All-Weather Performance
Our windows feature advanced weather stripping and J-channel construction that create a tight seal, locking out drafts, moisture, and outdoor allergens for a more comfortable home.
Invisible Insect Screens
Our low-profile screens provide excellent protection from insects without the bulky clips or frames of older designs, giving you a clean, clear view of the outdoors.

The Keystone Promise: Quality from Start to Finish

Your investment is protected by our commitment to excellence.

Transparent Pricing: Your quote is always upfront and all-inclusive. No surprises.
Expert Installation: Our Installation Masters-certified experts ensure a flawless fit and finish.
Lifetime Warranty: Your windows are backed by our transferable lifetime warranty, a testament to the quality we deliver.

Choose from over 30 color combinations, including natural wood interior finishes like white oak or cherry, to create the perfect look for your home.

Casement Windows: Unobstructed Views & Unmatched Performance

For homeowners who want a wide, uninterrupted view of the outdoors combined with maximum energy efficiency, nothing beats a casement window. Hinged at the side to swing outward like a door, our casement windows provide top-to-bottom ventilation and create an airtight seal when closed, making them one of the most secure and efficient styles you can choose.

At Keystone Window, we’ve engineered our casement windows to be a perfect blend of elegance, strength, and long-term value.

Maximum View, Maximum Security

Our casement windows are designed for complete peace of mind. A single, easy-to-use crank handle opens and closes the window, while a powerful multi-point locking system secures the sash at multiple points along the frame. This creates a seal so tight it drastically reduces drafts and provides enhanced security.

Engineered for Lower Energy Bills

Every window is built with AAMA-certified vinyl and advanced weather stripping to stop energy loss in its tracks. Combined with our energy-efficient glass options, like double-pane Low-E glass, our casement windows help keep your home comfortable year-round while significantly lowering your heating and cooling costs.

The Keystone Promise: Quality from Start to Finish

Your investment is protected by our commitment to excellence.

Transparent Pricing: Your quote is always upfront and all-inclusive. No surprises.
Expert Installation: Our Installation Masters-certified experts ensure a flawless fit and finish.
Lifetime Warranty: Your windows are backed by our transferable lifetime warranty, a testament to the quality we deliver.

Choose from over 30 color combinations, including natural wood interior finishes like white oak or cherry, to create the perfect look for your home.

Contact Us for Casement Windows in Pennsylvania

Are you ready to elevate your living spaces with the irresistible charm, efficiency, and functionality of casement windows? Look no further! Contact Keystone Window of Pennsylvania today and take the first step towards transforming your home. Our expert team is here to address your queries, offer valuable advice, and arrange flawless casement window installation in Southeastern Pennsylvania, including Bucks & Montgomery Counties. Together, let’s embark on this exciting home improvement journey to create a more beautiful, comfortable, and energy-efficient haven for you and your beloved family.

We are also proud to provide the following window types for homes across Pennsylvania:

Frequently Asked Questions

FAQ - All You Need to Know About Casement Windows

What is a casement window?

A casement window is hinged on the side, while an awning window is hinged at the top. Both crank outward with a simple lever, making them ideal for areas like over kitchen cabinets. Each unit provides excellent airflow, which helps your home’s air filters work more efficiently.

Are casement and awning windows energy efficient?

Yes, they are among the most efficient styles. When closed, the sash presses tightly against the frame perimeter, and the secure locking mechanism creates an airtight seal. This prevents air leaks, leading to significant savings on your cooling bills during the summer.

Can I customize these windows?

Absolutely. You can create a unique look with options like custom grille patterns or choose from premium materials like durable fiberglass. We offer a wide range of colors, from classic clay to deep hunter green, so you can design a window that is truly your own.

What makes Keystone different from brands like Andersen?

While a national brand like Andersen has a wide range of products, Keystone focuses on what local homeowners need most. Every window we sell is manufactured in our factory to meet our high standards and is installed by our certified experts, which is a level of service and accountability that is different from what Andersen offers.

Gallery

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Customer Reviews

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