Buying Guide
The Biggest Window Buying Mistakes
Many buyers focus on appearance and price alone. Learn which performance, hardware and installation factors actually decide long-term value for residential and commercial projects.
About Grandor
China's Aluminum Door & Window Manufacturer Built for Overseas Projects
Grandor Door Industry Co., Ltd. has spent more than 16 years engineering high-security, fully customized aluminum windows and doors for importers, distributors, builders and architects worldwide.
Every critical step — aluminum extrusion, surface coating, glass tempering and precision assembly — happens under one roof in our 155,000 m² smart factory in Foshan, Guangdong. Supported by a network of 800+ stores and a complete supply chain, we deliver stable quality, predictable lead times and fast global shipping for projects of any size.
The result for buyers: one accountable manufacturer, one set of shop drawings and one quality standard from the first profile to the final crate.
155,000 m²
Smart Factory Area
60+
Export Countries
1,000+
Finished Projects
16+ yrs
Customization Expertise
800+Retail stores
& supply network
& supply network
Product Solutions
Enhancing Every Space with Comfort, Safety & Timeless Design
Three engineered system families that cover the full building envelope — from high-performance glazing to statement entrances.
01
Thermal-Break Aluminum Windows
High-performance systems engineered for structural integrity, superior U-value ratings and seamless architectural integration.
- Polyamide thermal-break profiles
- Insulated Low-E & laminated glass options
- Casement, sliding, tilt & turn, skylight and more
02
Aluminum Doors
Heavy-duty, commercial-grade door systems featuring precision hardware, high-cycle durability and versatile configurations for large-scale projects.
- Lift & slide, folding and casement doors
- Large-span panels with slim sightlines
- Weather-sealed low-threshold options
03
Front Entry Doors
Premium security entrances with multi-point locking systems and reinforced frames built to meet stringent safety and durability requirements.
- Pivot and swing entry configurations
- Multi-point locks & smart-lock ready
- Wood-grain and custom powder finishes
Why Choose Us
Every Process In-House, Every Detail Under Control
Aluminum extrusion, surface coating, glass tempering and precision assembly are performed inside our own facility — removing the quality gaps that appear when production is split between subcontractors.
Premium Raw Materials
Architectural-grade aluminum alloy profiles, polyamide thermal-break strips, EPDM gaskets and safety glass selected for long-term dimensional stability and weather resistance.
Precision Engineering
CNC cutting, corner crimping and hardware machining controlled to tight tolerances, so sashes align, seals compress evenly and locks engage smoothly for years.
Customized Solutions
Sizes, colors, wood-grain finishes, glass build-ups and hardware are engineered to your drawings, climate zone and local building codes — for wholesale and single projects alike.
STEP 01
Aluminum Extrusion
Profiles extruded in-house for consistent wall thickness.
STEP 02
Surface Coating
Powder, anodized and wood-grain finishes applied on site.
STEP 03
Glass Tempering
Tempered and insulated glass produced to specification.
STEP 04
Precision Assembly
Final assembly, inspection and export-grade packing.
Standards & Compliance
Engineered to the Standards Your Market Requires
Overseas buyers carry the compliance risk on site. That's why our engineers review structural, thermal and water-tightness requirements before production — not after delivery.
- Shop drawings and hardware specifications confirmed before manufacturing.
- Pre-shipment inspection by your nominated third party is welcome.
- Export crating designed to protect coated profiles and glass in transit.
ISO 9001Quality management framework
CEEN 14351-1 for windows & doors
AS 2047Australian window performance
AS 1288Glass selection & installation
NFRCNorth American energy rating
ASTME283 / E330 / E547 testing
Certificate and test-report availability varies by product series. Request the documents for your selected systems before ordering.
Architectural Partnership
Your Vision, Our Expertise
From concept elevations to on-site installation guidance, we translate architectural intent into windows and doors that perform in every climate.
Start Your Project Hot Products
Best-Selling Aluminum Window & Door Systems
The configurations overseas distributors and builders specify most — each available in custom sizes, finishes and glass packages.
Window
Aluminum Casement Window
Compression seals on all sides for top-tier air and water tightness.
View DetailsWindow
Aluminum Sliding Window
Space-saving operation with smooth rollers and wide glass views.
View DetailsWindow
Tilt and Turn Window
Dual-function sash for secure ventilation and easy cleaning.
View DetailsWindow
Aluminum Skylight Window
Brings daylight deep into rooms with sealed, insulated roof glazing.
View DetailsDoor
Aluminum Sliding Door
Large-span panels that open living spaces to patios and views.
View DetailsDoor
Aluminum Folding Door
Bi-fold panels stack neatly for a fully open indoor-outdoor transition.
View DetailsDoor
Aluminum Casement Door
Classic hinged French-style doors with multi-point security locks.
View DetailsEntry
Pivot Front Entry Door
Oversized statement entrances with concealed pivots and reinforced cores.
View Details Project Cases
Proven on Real Residential Projects Worldwide
Selected installations that show how our systems perform in different climates, structures and design styles.
Brisbane · Australia278 m²
Modern Steel-Structure Residence
A contemporary steel-frame home where slim aluminum systems were coordinated with the structure for clean sightlines and reliable weather sealing.
View Project PortfolioMelbourne · Australia220 m²
Brighton Villa – 100 Series Installation
A comprehensive new-construction package using heavy-duty 100 Series profiles for a coastal climate that demands strength and thermal comfort.
View Project PortfolioNorth Carolina · USA500 m²
Residential Entry System in Lake Norman
A bespoke wood-grain aluminum entry system combining the warmth of timber aesthetics with the low maintenance and security of aluminum.
View Project PortfolioPrepare Your Project Brief in 5 Steps
Buyers who send these details receive a faster, more accurate technical proposal.
- Drawings or elevationsArchitectural plans, PDFs or hand sketches.
- Window & door scheduleOpening types, quantities and sizes.
- Performance targetsU-value, wind load, water and acoustic ratings.
- Finish & glassFrame color, wood-grain, Low-E or laminated glass.
- LogisticsDestination port and target delivery date.
Project Consultation
Let's Build Your Perfect Space Together.
Share your project details and our team will prepare a tailored solution that fits your design intent, performance requirements and budget.
- Every enquiry reviewed by a project engineer, not a generic sales script.
- System recommendations matched to your climate and building codes.
- Support for importers, distributors, contractors and developers.
Buyer FAQ
Answers for Overseas Importers & Builders
Practical guidance drawn from 16+ years of supplying aluminum windows and doors to international projects.
What information do you need to prepare an accurate proposal?
Send architectural drawings or elevations, a window and door schedule with opening sizes, performance targets such as U-value, wind load and acoustic rating, your preferred frame finish and glass specification, plus the destination port and project timeline.
Why choose thermal-break aluminum windows?
A thermal break is a low-conductivity polyamide strip separating the inner and outer aluminum profiles. It reduces heat transfer, lowers condensation risk and — combined with insulated Low-E glass — allows the frame to reach far better U-values than standard aluminum.
Can sizes, colors and hardware be customized for my market?
Yes. Because profiles are extruded, coated and assembled in-house, we can engineer frame colors, wood-grain finishes, glass build-ups, hardware and opening configurations to your drawings and local standards.
Do you handle large residential and commercial projects overseas?
Yes. Our 155,000 m² factory supports wholesale and project orders of any size, with completed installations including residences in Brisbane and Melbourne, Australia, and Lake Norman, North Carolina, USA.
Insights
View All Latest News & Articles
Professional guides, project highlights and expert tips on modern window and door systems.
Comparison
Sliding Doors vs Folding Doors: Choosing the Right Solution for Modern Spaces
How opening width, stacking space, thresholds and weather exposure should guide the choice between sliding and folding door systems.
Technology
Why Thermal Break Aluminum Windows Matter
Window systems affect indoor comfort, energy management and noise control. See how thermal-break technology changes aluminum window performance.
Cost Guide
How Much Do Custom Aluminum Windows Cost?
A breakdown of the dimensions, glass, finishes and performance requirements that drive the price of custom aluminum windows.