Sliding / Casement / Tilt & Turn / Fixed
Aluminum Windows
High-performance windows for modern architecture with slim sightlines, thermal efficiency, and design flexibility.
Designed to perform. Built to last.
Premium Aluminum
Windows & Doors
Thermally broken aluminum systems combining refined design, excellent performance, and lasting durability.
Thermal PerformanceReduced heat transfer
Strength & DurabilityBuilt for long-term use
Design FlexibilityMultiple styles and finishes
Export SupportProject-ready service
Explore Our Products
Engineered Aluminum. Beautifully Crafted.
Two core product categories with custom sizes, glass, finishes, and configurations for residential and commercial projects.
Tailored to Your Project
Custom Window & Door Systems
We support architects, builders, dealers, and homeowners with customized solutions from profiles and glass to packing and export preparation.
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Product Showcase
Crafted for Modern Living
Real windows, doors, and showroom systems selected from customer-provided product materials.
Glass Room Systems
Large sliding glass systems for refined interior partitions and showroom spaces.
Sliding Door Projects
Clean aluminum sliding doors for offices, balconies, and renovation projects.
Balcony Windows
Thermally broken window systems for apartments and high-rise residences.
Showroom Door Families
Multiple door finishes and glass options for residential and commercial use.
Why De Long
Project-ready systems from Foshan
From profile selection to glass, hardware, color, and packing, we help turn architectural requirements into practical window and door solutions.
Discover our companyQuality Assurance
Strict product control from materials to finished windows and doors.
Foshan Manufacturer
Advanced production lines and skilled workmanship from a mature supply chain.
Flexible Solutions
Custom designs, finishes, glass, hardware, and packaging for each project.
Global Partner
Reliable communication for quotation, production details, packing, and export preparation.