High-strength aluminum profiles with optional thermal-break construction for improved durability and thermal performance.
Clear, Low-E, tempered, laminated, and insulated glass options are available according to project requirements.
Professional sealing helps improve air and water resistance and supports long-term weather performance.
Size, glass configuration, frame color, surface finish, and opening method can be customized to suit different architectural requirements.
LANGE operates a modern 20,000 m² manufacturing facility specializing in high-performance aluminum windows and doors. Equipped with advanced precision machinery, including the German Elumatec SBZ 628 CNC Processing Center and Sigma Fully Automatic Corner Crimping Line, our production system delivers precise machining, consistent corner joints, and reliable product quality for both customized and large-scale projects.
High-strength aluminum alloy provides excellent durability and structural stability for long-term use.
Multi-point locking and high-quality seals help improve airtightness, sound insulation, and weather resistance.
Hinged design provides a large opening area for better ventilation and easy access.
Optional thermal break profiles, double/triple glazing, and Low-E glass help improve thermal insulation and energy efficiency.
Strong hardware and multi-point locking systems provide enhanced security and stable operation.
Custom sizes, colors, glass types, hardware, and opening directions are available for different project requirements.
For bulk orders, we can customize hardware handrails according to your project requirements.
Non-standard dimensions can be customized according to your drawings, measurements, or project requirements.
Choose from Clear, Low-E, Tempered, Laminated, and Insulated Glass to meet different lighting, thermal, and safety requirements.
Available in Fixed, Manual, or Electric configurations according to ventilation and project requirements.
Aluminum profiles, frame dimensions, surface finishes, and RAL colors can be customized.
Hardware, sealing components, and supporting accessories can be selected according to the skylight design and installation requirements.
Our technical team can develop the skylight configuration based on architectural drawings, site conditions, climate, and regional requirements.
LANGE maintains strict quality control from raw materials and precision processing to assembly and final inspection. Advanced CNC equipment and standardized production processes ensure consistent product quality. Every order is carefully inspected before shipment to ensure it meets the agreed specifications and project requirements.
Professional experience in aluminum windows, doors, and architectural systems.
A modern integrated production facility with strong manufacturing capacity.
Equipped with imported CNC and automated production equipment from Germany, Italy, and Japan.
Customized dimensions, glass configurations, colors, finishes, and opening methods for different projects.
Supporting large-volume and full-container orders with efficient production and reliable delivery schedules.
Serving customers across North America, Europe, Australia, New Zealand, the Middle East, and other international markets.
A: We are a factory-direct manufacturer with 22+ years of experience. Our 20,000 m² facility in Zhengzhou, China is equipped with advanced CNC and automated production equipment, including German ELUMATEC SBZ 628 CNC machining centers.
A: No worries. With 20+ years of export experience, we provide professional support throughout the entire process: Quotation → Design → Production → Quality Inspection → Shipment → Delivery.
A: Our standard terms are:
• T/T: 30% deposit, 70% balance before shipment.
• L/C: 100% irrevocable L/C at sight.
Other payment methods may be available depending on the order and transaction terms.
A: Lead time depends on order quantity, size, glass configuration, color, hardware, and customization. We will provide a confirmed production schedule after the specifications and order details are finalized.
A: Yes. We can customize the size, panel configuration, aluminum profile, color, glass configuration, and installation requirements according to your project. Please provide the required dimensions, installation location, and drawings or site photos if available.
A: Yes. Our advanced production equipment supports large-volume and full-container orders, with consistent quality and reliable production capacity.