Reliable Chinese Casement Windows Manufacturer
Casement windows are one of the most in-demand window styles in the U.S. construction market, valued for their functionality, durability, and clean architectural design. Their outward-opening system provides excellent ventilation and ease of use, making them a reliable choice for large-scale residential developments, commercial properties, and renovation projects.
At Grandsea, we manufacture and export premium casement windows built to U.S. specifications. Available in aluminum, wood-aluminum, and uPVC variations, our casement windows are engineered for energy efficiency, weather resistance, and long-term durability. With flexible customization in sizes, finishes, and glazing options, we provide importers, wholesalers, and contractors with factory-direct solutions that balance quality, design, and competitive value.
We use high-grade aluminum alloy profiles with high strength, light weight and corrosion resistance. All profiles are subjected to strict quality testing to ensure that long-term use does not deform and does not fade.
We choose hardware accessories of famous brands, such as German Roto and Italian AGB hinges, to ensure flexible switching and long service life. All fittings have been tested by 100,000 times of switching to ensure trouble-free long-term use.
With direct sales from leading domestic window and door manufacturers, coupled with years of supply chain management, we offer our customers highly competitive prices while ensuring quality. Compared with similar products, our price advantage can reach 15-20%.
We utilize advanced CNC processing technology to ensure that each component is accurate to the millimeter level. Adopt unique corner joint technology, make the window frame connection more solid and beautiful.
Airtight performance:
meets the national grade A standard.
Watertight performance:
static pressure not less than 700Pa
Wind pressure resistance:
can withstand wind pressure of 3000Pa.
Our products adopt double-layer insulating glass, filled with argon gas, effectively reducing heat conduction. The insulation strip is made of nylon 66 material, which further enhances the heat preservation effect. The comprehensive energy saving rate can reach more than 40%.
more casement window designs
Aluminum casement widows
Retro french casement windows
Aluminum clad wood casement windows
Double Glazed Aluminum Casement Windows
Panoramic series casement windows with insect screens
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Viewable area:
20% more than ordinary casement window -
Glass thickness:
8mm+16A+8mm hollow Low-E glass - Frame and sash thickness: 80mm
- Opening angle: up to 90 degrees
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Load-bearing capacity:
up to 80kg for a single sash -
Scope of application:
high-end residences, hotels, office buildings
This series of windows adopts a multi-cavity design to effectively block the sound propagation path. The special sealing strip design ensures that it is tightly closed when closed, achieving super sound insulation effect.
Ultra Silent Series Modern Casement Windows
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Sound insulation performance:
Rw value reaches 42dB, effectively blocking external noise -
Glass thickness:
6mm+12A+6mm hollow tempered glass - Frame sash thickness: 70mm
- List ItemOpening method: Tilt & Turn
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Surface treatment:
fluorocarbon spraying, strong weather resistance -
Scope of application:
high-end residences, hotels, office buildings
This white casement window can be fully opened to provide maximum air circulation while offering unparalleled views. Grandsea’s casement windows are not only beautiful, but also have excellent energy efficiency and safety performance.
What is a Casement Window?
A casement window is a side-hinged window that opens outward with the help of a movable sash. Unlike fixed windows, it offers smooth operation, maximum airflow, and clear outdoor views. With modern locking mechanisms, casement windows are easy to use, improve indoor air circulation, and help reduce humidity and mold. Available in multiple opening styles—tilt, pivot, protruding, or sliding—casement windows provide flexibility for a wide range of architectural needs.Stable and Practical Casement Windows
Casement windows are more than just attractive. Their design directs wind pressure through sturdy fittings, ensuring safety and performance. That’s why high-quality frames and glass are essential.At Grandsea, we offer:- Multi-chamber aluminum casement windows for insulation and strength
- uPVC casement windows reinforced with glass fibers for added durability
- Wood-aluminum hybrid casement windows for classic elegance and low maintenance
- Double or triple glazing options to enhance thermal and acoustic insulation
Advantages of Casement Windows
- Outward-opening sashes save interior space
- Excellent weatherproofing and moisture resistance
- Superior thermal and sound insulation
- Highly secure with multi-point locking systems
- Personalized design and finishing options
- Sleek aesthetics that enhance your home’s façade
Material Options for Casement Windows
At Grandsea, we provide custom casement windows in multiple materials to suit different needs:- Aluminum Casement Windows – Strong, lightweight, low-maintenance, available in a wide range of colors and finishes.
- Wood-Aluminum Casement Windows – Natural wood warmth on the inside, aluminum cladding on the outside for weather resistance.
- uPVC Casement Windows – Affordable, energy-efficient, resistant to rust, rot, and corrosion.
Why Choose Grandsea Casement Windows?
With over 25 years in window manufacturing and 800+ successful projects worldwide, Grandsea has earned the trust of importers, wholesalers, and contractors across the worldwide. Every casement window we produce is built with:- High-performance materials tested for durability and energy efficiency
- Precision engineering for smooth operation and secure locking
- Personalized customization in size, color, glazing, and accessories
- Transparent pricing with no hidden costs
- Expert craftsmanship backed by decades of industry experience
Order Premium Casement Windows Today
Upgrade your home with Grandsea’s modern casement windows and experience the perfect blend of design, performance, and value.FAQ'S About casement windows
How much does it cost to buy a casement window?
The price of a custom casement window depends on how you want it to be designed. A casement window with standard dimensions and regular features costs around 200 USD.
At GRANDSEA, you can design your individual windows according to your wishes, and you can contact us to get an accurate casement window price. We provide the exact dimensions, materials, colors, glass types, window profiles and many other elements in our product quotes, so you can always check and monitor the price.
How to measure the casement window sizes?
The first and most important step is to measure the width and height of the wall opening where the new window should be inserted. To do this, measure along the outside of the wall opening – it is better to measure in several places, because your wall may be uneven and slightly curved.
Then subtract 2.5 cm from the measured width and height – this will give you the frame dimensions of the future window. If you want to design and order windows, you can contact the staff of Granti directly for one-on-one consultation. Once you place your order, we will take care of everything and manufacture your customized windows, and arrange logistics to deliver them to your home if necessary.
What are double casement windows?
The classic among casement windows: double casement windows, also known as French casement windows. Double casement windows of various designs can be found in almost every building or room.
Are black casement windows good?
A popular modern casement window design, the black window frame creates a striking contrast, especially when paired with light-colored walls.
Adds a modern and stylish touch to the house.
Is single casement window good?
Do you have a room that doesn’t need a lot of sunlight or only allows for a small window? The solution: single casement windows from Granty. Our single casement windows are available with fixed glass or hinged or tilting opening and closing mechanism.
Window design and custom configuration
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