French Double Windows

French Double Casement Windows Manufacturer & Supplier in China

French double casement windows offer a timeless European look combined with exceptional ventilation and energy efficiency. At Hanstim, we manufacture and supply uPVC and aluminum French casement windows designed for homes, villas, and commercial buildings. Our windows feature double outward-opening sashes with no center post, delivering unobstructed views and easy operation. Whether you’re sourcing for a building project or bulk purchasing for resale, Hanstim is your trusted French casement window supplier in China.

What Are French Double Casement Windows?

French double casement windows—also known as French-style double opening windows—consist of two sashes that open outward from the center without a vertical mullion. This classic European design maximizes natural light and airflow. Compared to standard casement windows, French casement windows offer a larger clear opening, making them ideal for both modern and traditional architecture.

Key Features:

Double sashes opening outward
No center post (mullion-free design)
French aesthetics and symmetry
Ideal for egress, ventilation, and open views

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Features & Performance Benefits

Choose us, and we promise to do everything needed to ensure a successful and satisfactory working partnership. The 8 reasons set out below will give you an insight into our advantages.

Elegant Design Meets Functionality

Stylish French aesthetics for upscale homes and villas
Symmetrical double sash layout
Custom color and finish options

Superior Ventilation

Both sashes open fully for maximum airflow
Ideal for kitchens, bedrooms, or living rooms

High Energy Efficiency

Double or triple glazing options available
Low-E or argon-filled insulated glass
Enhanced thermal insulation for passive house performance

Security & Sealing

Multi-point locking systems
High-quality EPDM seals for airtight performance
Windproof and waterproof for all climates

Material Options & Customization

We offer custom French casement windows in a wide range of materials, colors, and specifications to match your project needs:

Frame Materials

Durable, economical, low-maintenance

Aluminum: Sleek, modern, strong with thermal break

Aluminum-wood composite (optional for premium builds)

Glazing Options

Double glazing / Triple glazing

Tempered, frosted, laminated, or reflective glass

Low-E, sound-insulated, anti-UV coatings available

Double glazing

Triple glazing

Frosted/Laminated

Low-E

Colors & Hardware

RAL color customization

Optional decorative grilles or muntins

Branded European or Chinese hardware

Built-in mosquito screens or roller screens

Why Choose Hanstim as Your French Casement Window Manufacturer?

Hanstim is a professional French casement window manufacturer and exporter in China, trusted by builders, architects, and distributors worldwide.

Direct Manufacturer

Over 15 years of window manufacturing experience

Fully Customizable

Frame color, size, hardware, opening angle, and more

Easy Installation Support

Engineering assistance available for your contractors

Global Export Experience

Serving clients across Europe, North America, and Southeast Asia

Application Scenarios

French double casement windows are ideal for both modern and classic applications, including:Our tilt and turn windows with wash mode are ideal for:

Private residences and villas

Apartment complexes

Office buildings and commercial spaces

Renovation and replacement projects

Passive houses and energy-efficient homes

Our Case Studies – Wash Mode Windows in Real Projects

School in the Texas

Condo Project in Canada

We supplied over 120 sets of French double casement windows for a luxury villa project.The client requested black aluminum frames with triple-glazed Low-E glass for energy efficiency and noise reduction. Material: Aluminum with thermal break Glass: Triple-glazed Low-E Quantity: 120+ windows Feedback: Excellent insulation and elegant French design aesthetics

Used aluminum tilt and turn windows with solar-control glazing. Classrooms benefited from improved airflow and heat control.

selected RAL 7016 aluminum windows with triple glazing, combining security and ventilation for urban condos.

FAQs

Are double casement windows energy-efficient?

Yes. Double casement windows with double or triple glazing and quality sealing can greatly improve energy efficiency by reducing heat transfer and air leakage. When paired with Low-E glass and thermal break frames, they help maintain indoor temperature, lower HVAC costs, and improve overall building comfort. We can recommend the best glass and frame combination for your climate zone.

How long does it take to manufacture and deliver double casement windows?

Production time for standard double casement windows is usually 15–25 days, while fully customized orders may require 30–40 days. Shipping time depends on destination — for example, 15–25 days to North America, 20–30 days to Europe, and 10–15 days to Southeast Asia. We provide full logistics support, including CIF, FOB, and DDP delivery terms.

Can I order custom-size double casement windows for my project?

Absolutely. We offer custom manufacturing of double casement windows according to your exact dimensions, frame color, glass thickness, and opening style. Our engineering team ensures precise fit, durability, and compliance with local building codes. For B2B projects, we can provide CAD drawings and production samples before mass manufacturing.