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Aluminum Windows Export from China – Double Glazed Specs, Pricing & Certifications

Aluminum windows installed on residential building in China - double glazed thermal break frames

Aluminum Windows Export from China – Double Glazed Specs, Pricing & Certifications

ROGENILAN manufactures aluminum windows in Foshan, China with 6063-T5 alloy profiles, polyamide thermal break strips, and double glazed configurations. This article documents frame specifications, glazing options, thermal performance data, pricing structures, and certification requirements for procurement teams evaluating aluminum window supply from China.

Aluminum Window Frame Profiles and Alloy Specifications

The aluminum window frame forms the structural backbone of any window unit. Profile alloy grade, wall thickness, and cross-section geometry determine structural integrity, wind load resistance, and service life.

6063-T5 vs 6061-T6 Alloy Comparison

Two aluminum alloy grades dominate window manufacturing in China. The table below compares their mechanical properties:

Property 6063-T5 6061-T6
Tensile Strength (MPa) 160 310
Yield Strength (MPa) 110 275
Elongation (%) 8 12
Hardness (Webster) 11-13 15-17
Thermal Conductivity (W/m·K) 209 167
Extrusion Speed (m/min) 15-25 8-12
Cost Index (relative) 1.0 1.35

ROGENILAN uses 6063-T5 for standard window profiles due to its extrusion efficiency and surface finish quality. 6061-T6 is specified for high-rise projects requiring wind load resistance above 3.0 kPa.

Wall Thickness and Profile Dimensions

Profile wall thickness directly affects structural performance and cost. Chinese national standard GB/T 8478-2020 specifies minimum wall thickness by window type:

Window Type Min Wall Thickness (mm) Standard Profile Depth (mm) Weight (kg/m)
Casement Window 1.4 60-70 1.8-2.2
Sliding Window 1.2 70-90 2.0-2.5
Folding Window 1.6 80-100 2.5-3.0
Fixed Window 1.2 50-70 1.5-2.0
High-Rise Casement 1.8 70-80 2.5-3.0

ROGENILAN’s standard aluminum windows use 1.4mm minimum wall thickness for casement profiles and 1.2mm for sliding profiles, exceeding GB/T 8478 requirements.

Double Glazed Windows: Performance and Configuration Data

Double glazed windows incorporate two glass panes separated by a spacer bar and sealed with desiccant. The insulating glass unit (IGU) configuration determines thermal, acoustic, and solar performance.

Glass Configuration Options

The following configurations are available for double glazed aluminum windows:

Configuration Glass Thickness Air Gap (mm) U-Value (W/m²K) STC Rating (dB) Price ($/m²)
5+9A+5 Clear 5mm/5mm 9 2.8 30 32-38
5+12A+5 Clear 5mm/5mm 12 2.5 32 35-42
5+12A+5 Low-E 5mm/5mm 12 1.8 32 48-55
6+12A+6 Low-E 6mm/6mm 12 1.6 34 55-65
6+16A+6 Low-E+Ar 6mm/6mm 16 1.4 35 65-78
8+12A+8 Tempered 8mm/8mm 12 2.2 36 72-88

Argon-filled Low-E double glazed units deliver U-values as low as 1.4 W/m²K, meeting passive house requirements (U ≤ 1.5 W/m²K for windows in cool-temperate climates).

SHGC and Visible Light Transmittance

Solar Heat Gain Coefficient (SHGC) and Visible Light Transmittance (VLT) vary by glass coating type:

Coating Type SHGC VLT (%) Application
Single Silver Low-E 0.38-0.42 70-75 Residential, temperate climate
Double Silver Low-E 0.28-0.32 65-70 Residential, hot climate
Triple Silver Low-E 0.22-0.25 55-62 Commercial, tropical climate
Clear Double Glazed 0.65-0.70 80-85 Cold climate, passive solar gain

House Windows: Sizing, Styles, and Configuration

House windows require specific sizing and operating configurations based on room function, ventilation requirements, and building code compliance. The following data covers standard configurations for residential projects.

Standard Window Sizes for Residential Projects

ROGENILAN manufactures house windows in both standard and custom dimensions. The table below lists common sizes by window type:

Window Type Standard Width (mm) Standard Height (mm) Max Single Sash (mm) Typical Application
Single Casement 600-900 1200-1500 900×1500 Bedroom, bathroom
Double Casement 1200-1800 1200-1500 900×1500 Living room, master bedroom
2-Track Sliding 1200-1800 1200-1500 900×1500 Kitchen, utility room
3-Track Sliding 1800-2700 1200-1800 900×1800 Living room, balcony
Fixed + Casement Combo 1500-2400 1500-2400 1200×2400 (fixed) Picture window, facade
Awning Window 600-1200 400-600 1200×600 Bathroom, basement

Operating Styles and Hardware Specifications

Hardware selection impacts operation force, sealing performance, and maintenance intervals:

Sliding window systems use dual-track design with anti-lift blocks for security, while casement configurations incorporate European-style multi-point locking systems with 5mm engagement depth.

Aluminum Window Frame Engineering and Thermal Break Technology

Thermal break technology separates the interior and exterior aluminum profiles with a low-conductivity material, reducing heat transfer through the frame. The aluminum window frame thermal performance depends on strip material, width, and profile geometry.

Polyamide Thermal Break Strip Specifications

ROGENILAN uses polyamide 66 (PA66) with 25% glass fiber reinforcement for thermal break strips. Key parameters:

Parameter PA66+GF25 PVC (economy) Polycarbonate
Thermal Conductivity (W/m·K) 0.30 0.16 0.22
Tensile Strength (MPa) 180 50 65
Service Temperature (°C) -40 to +120 -10 to +60 -40 to +100
UV Resistance Good Poor Good
Coefficient of Linear Expansion (10⁻⁶/K) 25 80 65
Strip Width Options (mm) 14.8, 24, 34, 44 14.8, 24 14.8, 24

PA66+GF25 strips maintain dimensional stability across temperature ranges from -40°C to +120°C, critical for projects in extreme climates. The 24mm and 34mm strip widths are standard for residential and commercial applications respectively.

Thermal Performance Comparison Data

Frame U-values vary significantly by thermal break width and profile design:

Frame Configuration Strip Width (mm) Frame Uf (W/m²K) Whole Window Uw (W/m²K)
Non-Thermal Break 0 5.8 4.2
14.8mm Thermal Break 14.8 3.2 2.6
24mm Thermal Break 24 2.4 1.9
34mm Thermal Break 34 1.8 1.6
44mm Thermal Break 44 1.4 1.3

Whole window U-values (Uw) are calculated per EN ISO 10077-1 with 5+12A+5 Low-E glazing. A 34mm thermal break with Low-E double glazing achieves Uw = 1.6 W/m²K, meeting EU energy labeling Class B requirements.

Pricing, MOQ, and Procurement Data

Export pricing for aluminum windows from China varies by configuration, glass type, surface treatment, and order volume. The following data reflects 2025 FOB pricing from ROGENILAN’s Foshan facility.

Price Structure by Configuration

Configuration Profile Glass FOB Price ($/m²) Min Order (m²)
Sliding, Non-Thermal 1.2mm, 70mm depth 5+9A+5 Clear 45-55 100
Sliding, Thermal Break 1.4mm, 90mm depth 5+12A+5 Clear 65-78 100
Casement, Thermal Break 1.4mm, 70mm depth 5+12A+5 Low-E 78-95 80
Casement, Premium 1.6mm, 80mm depth 6+16A+6 Low-E+Ar 110-135 50
Folding, Thermal Break 1.8mm, 100mm depth 6+12A+6 Low-E 145-180 30
Fixed, Large Span 1.4mm, 70mm depth 8+12A+8 Tempered 55-70 100

Order Requirements and Lead Times

Parameter Specification
MOQ 50-100 m² (varies by configuration)
Lead Time 30-45 days for standard; 45-60 days for custom
Payment Terms 30% T/T deposit, 70% before shipment; L/C at sight for orders >$50,000
Packaging Wooden crate with EPE foam + plastic film, steel corner protectors
Container Loading 20GP: ~120m²; 40HQ: ~300m² (knocked-down packing)
Warranty 5 years on profiles and hardware; 10 years on IGU seal
Sample Policy Paid samples ($200-400), credited against bulk order
Surface Treatment Options Powder coating (RAL/wood grain/anodized), film thickness 40-80μm

Certifications and Compliance Standards

Aluminum windows exported from China must meet destination market certification requirements. ROGENILAN maintains active certifications for multiple international markets.

International Certification Requirements

Certification Market Key Requirements Renewal Cycle
CE Marking (EN 14351-1) EU U-value ≤ 2.0 W/m²K, air permeability Class 3, water tightness Class 9A Annual factory audit
NFRC USA/Canada U-factor and SHGC rating, condensation resistance Annual product certification
AAMA 101 USA Structural design pressure, water penetration, air infiltration 5 years
Miami-Dade NOA Florida, USA Large missile impact, cyclic wind pressure 4 years
AS 2047 Australia Wind pressure, water penetration, air infiltration 3 years
ISO 9001:2015 Global Quality management system 3 years + annual surveillance
GB/T 8478-2020 China Domestic standard for aluminum alloy windows Annual

Testing Standards and Performance Grades

Performance grades per Chinese national standard GB/T 7106-2019 (wind load, air tightness, water tightness):

Performance Grade 1-3 Grade 4-6 Grade 7-9
Wind Load Resistance (kPa) 1.0-2.0 2.5-4.0 4.5-5.5
Air Permeability (m³/h·m) 4.0-2.5 1.5-0.5 ≤0.5
Water Tightness (Pa) 100-150 200-300 350-500
Typical Application Low-rise, sheltered Mid-rise, urban High-rise, coastal

ROGENILAN’s thermal break casement windows achieve Grade 6 wind load resistance (3.5 kPa), Grade 8 air permeability (0.5 m³/h·m), and Grade 7 water tightness (350Pa), suitable for buildings up to 100m height in standard urban environments.

Spray Coating and Surface Finish Parameters

Surface treatment affects both aesthetics and durability. ROGENILAN offers three primary coating systems:

Coating Type Thickness (μm) Pencil Hardness Weathering (Florida, 10yr) Color Options
Powder Coating 40-80 2H-3H ΔE ≤ 3.0 RAL, wood grain, custom
Anodizing 15-25 8H-9H ΔE ≤ 1.5 Clear, bronze, black, champagne
Electrophoresis 20-25 3H-4H ΔE ≤ 2.0 Clear, bronze, black
Fluorocarbon (PVDF) 25-40 2H-3H ΔE ≤ 2.0 Custom, metallic finishes

PVDF fluorocarbon coating is specified for coastal and high-UV environments, with 70% Kynar 500 resin content for 20-year color warranty. Powder coating with Qualicoat license provides cost-effective performance for inland residential applications.

Project Case Data

The following data summarizes actual export projects completed by ROGENILAN in 2024-2025:

Project Location Window Type Quantity (m²) Unit Price ($/m²) Total Value ($)
Marina Bay Apartments Manila, Philippines Sliding, thermal break 2,400 72 172,800
Riverside Villa Complex Brisbane, Australia Casement, thermal break 1,800 88 158,400
Coastal Resort Destin, Florida, USA Casement, impact-rated 950 135 128,250
Green Valley Homes Auckland, New Zealand Sliding, Low-E 1,200 68 81,600
Commercial Tower Dubai, UAE Fixed, high-span 3,500 62 217,000

These projects demonstrate pricing variation by destination, configuration, and volume. Impact-rated windows for Florida markets command 85-90% price premium over standard thermal break configurations due to laminated glass and reinforced profiles.

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