Requirements
Share your drawings, opening styles, dimensions, and performance priorities so we can understand the project clearly.
About De Long
Precision in
Every Opening
De Long Windows & Doors is a Foshan-based supplier of thermally broken aluminum doors and windows for residential and commercial projects. We combine considered material selection, practical configuration, and clear communication to help bring architectural ideas to life.
Our Process
From Foshan to Your Project
A clear and collaborative journey from initial requirements to production support, built around the details that matter to your project.
Configuration
We align the aluminum system, glass, finish, hardware, and opening method with your practical requirements.
Quotation
You receive a clear project quotation with the product configuration and production details confirmed together.
Project Support
We keep communication consistent through detail confirmation, production, packing, and export preparation.
Materials That Last
Thoughtful Materials,
Refined Performance
Aluminum profiles, glass, finishes, seals, and hardware are considered as one complete system. Each choice is matched to the opening style, appearance, and performance priorities of the project.
Designed for Architecture
System Solutions for
Modern Spaces
Casement, sliding, and custom combinations support villas, apartments, storefronts, and renovation projects with clean sightlines and flexible dimensions.
Explore product systems
Let's Work Together
Have a Project in Mind?
Share your opening sizes, drawings, or product requirements with our team.