What is the minimum order quantity for aluminum windows and doors?

Because every unit is made to measure, VELTOR accepts single-project orders as well as container-load dealer orders. The practical minimum is usually defined by shipping economics, so we help buyers consolidate windows and doors into one shipment.

Do you offer thermal break aluminum windows for cold climates?

Yes. Our thermal-break systems use polyamide insulating strips combined with double or triple insulated glass units, Low-E coatings and warm-edge spacers. Final thermal performance depends on the system series and glass build-up chosen for your climate zone.

Can you manufacture to my local building standards?

We engineer each project against the buyer's target standards for wind load, water tightness, air permeability and safety glazing, and provide the related documentation for review before production.

How are windows and doors packed for export?

Frames are protected with film and corner guards, glass units are separated, and finished products are loaded in reinforced wooden crates labeled by opening number to simplify on-site installation.

What is the typical production lead time?

Lead time depends on order size, finish and glass specification. After drawings are confirmed and the deposit is received, we issue a written production schedule so buyers can plan shipping and installation.

OEM/ODM Aluminum Vertical Sliding Windows Manufacturer & Factories

Architectural-Grade Thermal Break Vertical Sash Systems, Custom Extrusions, and High-Performance Fenestration Engineering for Global Projects.

Featured Aluminum Window & Door Product Range

Factory-direct engineered Fenestration Systems built for high wind loads, maximum thermal efficiency, and contemporary architectural aesthetics.

Modern Style Waterproof Aluminum Attic Skylight Roof Window Converts to Balcony Ventilation

Inquire Product

Large View Aluminium Corner Window, Custom Thermal Break Corner Bay Window for Modern Home

Inquire Product

Factory Direct Aluminum Clad Wood Sliding Door Large Size Glass Patio Door for Villa

Inquire Product

Frameless Invisible Door 60mm Soundproof Wood Aluminum Composite Custom Color Modern Interior Wall

Inquire Product

Thermal Break Modern Horizontal Aluminium Windows And Doors With 2.0mm Frame Multi Panel Folding

Inquire Product

LANGE High-end Aluminum Wood Composite Window Triple Glass Thermal Insulation Aluminum Clad Timber

Inquire Product

Exterior Patio Black Aluminum Frame Glass Stack Bifold Door

YY Florida Approval 10 Year Warranty Wholesale Exterior Patio Black Aluminum Frame Bifold Folding Door

Inquire Product

High-End Hesign Zinc-Iron Alloy Aluminum Door

High-End Hesign Zinc-Iron Alloy Aluminum Stainless Steel Baked Enamel Door for Hotel Villa Use

Inquire Product

35,000+

Factory Area (Sqm)

6063-T5

Architectural Alloy

100%

Pre-Shipment Assembly QC

50+

Export Destination Countries

Engineering Authority: OEM/ODM Aluminum Vertical Sliding Windows Manufacturing Benchmark

In the contemporary B2B architectural fenestration landscape, aluminum vertical sliding windows (often specified as vertical sashes, single-hung, or double-hung vertical sliding systems) represent a sophisticated balance between traditional structural vertical geometry and modern high-performance thermal engineering. Unlike standard horizontal sliders, vertical sliding windows require precise gravitational counterbalancing, micro-calibrated weatherproofing, and engineered structural profiles to handle wind load pressure without compromising operable smoothness.

As a premiere OEM/ODM Aluminum Vertical Sliding Windows Manufacturer & Factory located in Foshan, China—the world's dominant hub for extrusion engineering—VELTOR Window & Door Co., Ltd. provides real information gain to real estate developers, commercial contractors, and facade importers worldwide. By utilizing high-density 6063-T5 and T6 primary aluminum extrusions integrated with multi-cavity polyamide (PA66-GF25) thermal breaks, our factory produces vertical sash systems that far exceed international structural and thermal insulation standards (ASTM, AS2047, EN 14351-1).

Core Structural Engineering of OEM/ODM Vertical Sash Systems

Vertical sliding systems depend heavily on structural integrity and mechanical balance assemblies. Our OEM/ODM custom manufacturing processes focus on three foundational engineering variables:

Spiral Balance & Constant Force Mechanical Counterweights: We integrate heavy-duty stainless steel spiral balances and constant-force spring balances capable of handling heavy double-glazed and triple-glazed sashes up to 80kg per panel with zero effort operation.
EPDM & Silicone Co-Extruded Quadruple Weather Seals: To combat vertical water penetration during severe storms, our vertical sliding window frames utilize continuous EPDM gaskets combined with mohair weather-stripping along the interlock sills.
Structural Thermal Break Profile Engineering: Utilizing continuous 24mm to 34mm polyamide PA66-GF25 thermal insulating strips, our vertical sliding windows achieve low overall system thermal transmittance values (U-factor < 1.4 W/m²K / R-value > 4.0).

Precision CNC Extrusion

Multi-axis CNC milling machines ensure exact tolerance corner miter joints, drainage slots, and counterweight mortise cutouts down to ±0.1mm.

Thermal Performance

Multi-cavity thermal break extrusions combined with warm-edge glass spacers and argon gas filling minimize heat bridge transference.

Acoustic & Wind Rating

Engineered for extreme structural loads (DP50 to DP90 ratings) and acoustic dampening sound reduction up to STC 42 dB.

Factory OEM/ODM Production Capabilities & Technical Specifications Matrix

When selecting a factory partner for aluminum vertical sliding windows, technical transparency is essential. Below is the technical specification benchmark for VELTOR’s custom OEM/ODM vertical sash window production line compared against international architectural standards:

Performance Indicator	VELTOR Standard Specification	OEM/ODM Customization Range	Compliance Test Standard
Profile Material	Primary 6063-T5 / T6 Aluminum Alloy	6060-T66, 6061-T6 High Tensile Alloy	GB/T 5237 / ASTM B221
Nominal Profile Wall Thickness	1.8mm – 2.2mm Heavy Commercial	1.4mm (Residential) up to 3.0mm (Impact)	BS EN 755 / AS 2047
Glazing Architecture	5mm + 12Ar + 5mm Low-E Toughened	Triple Glass, Laminated Impact, VIG (Vacuum)	SGCC / IGCC / EN 12150
Air Permeability	Class 4 (q1 ≤ 0.15 m³/(h·m²))	Custom Pressurized Seals for High Rises	ASTM E283 / EN 12207
Water Tightness	900 Pa (Class E900)	Custom Raised Sub-Sill Drainage up to 1200Pa	ASTM E331 / EN 12208
Wind Load Resistance	± 4500 Pa (Serviceability DP70)	Engineered Structural Mulleins up to DP100	ASTM E330 / AS 4055
Surface Finishes	AkzoNobel Powder Coat (60μm+)	PVDF Kynar 500 (3-Coat), Anodized 25μm, Wood Grain	AAMA 2604 / AAMA 2605

Future Procurement Trends: Vertical Sliding Windows Industry Insights (2025–2030)

As modern building energy regulations become stricter across Europe, North America, and Australia, window procurement strategies are shifting from basic light-entry solutions to integrated energy-generating, highly automated building envelope components. Key trends shaping future OEM/ODM aluminum vertical sliding window sourcing include:

1. Motorized & Automated Vertical Actuation Systems

Commercial facades and luxury residences are increasingly specifying hidden electric linear actuators and smart home automation integration (Zigbee/KNX protocol). Motorized vertical sliding windows allow effortless operation of large-scale glass panels weighing up to 150kg, providing automated micro-ventilation triggered by CO2 and indoor humidity sensors.

2. Ultra-Narrow Sightlines & Minimalist Frame Geometry

Architectural design intent favors invisible frame lines. Future vertical sliding window engineering focuses on concealed balance tracks, structural silicone glazing (SSG) sashes, and interlocks reduced from the traditional 70mm width down to 22mm ultra-slim sightlines without sacrificing DP wind ratings.

3. Integration of Vacuum Insulated Glass (VIG)

To achieve Passive House certification standards (Uw ≤ 0.8 W/m²K) in vertical sliding designs—which historically suffered from higher sash air leakage—factories are combining multi-cavity thermal break profiles with 8.3mm thin Vacuum Insulated Glass units. This dramatically decreases window weight while outperforming traditional thick triple-pane glazing.

4. Circular Economy & Low-Carbon Recycled Aluminum Extrusions

Global procurement heads are demanding environmental product declarations (EPD). Utilizing post-consumer recycled aluminum billets (low-carbon aluminum refined via hydro-electricity) allows developers to earn LEED and BREEAM sustainability credits for commercial real estate projects.

Why Partner With VELTOR: Foshan’s Premier OEM/ODM Window Factory

Located in Building 6, Yiqiying Industrial Park, Shishan Town, Nanhai District, Foshan, VELTOR Window & Door Co., Ltd. provides complete vertically integrated production capabilities under one roof. Unlike trading intermediaries, we manage every phase of manufacturing to guarantee structural integrity and timing reliability.

Full Custom OEM/ODM Engineering

Our in-house design engineering team turns architectural CAD elevation drawings into millimeter-accurate shop drawings, extruding custom profile dies for proprietary commercial projects.

100% Pre-Assembly Quality Control

Every single vertical sliding window unit is 100% fully assembled, glazed, and balance-tested on our factory floor prior to crating, eliminating on-site installation misfits.

Export Heavy-Duty Reinforced Packing

Products are packed in fully enclosed fumigated plywood crates with protective corner guards, shock-absorbing foam layers, and individual elevation coding for effortless site sorting.

Frequently Asked Questions (FAQ)

Technical and logistical insights for window importers, project contractors, and architectural dealers.

Q1: What is the Minimum Order Quantity (MOQ) for custom OEM/ODM vertical sliding windows?

Because every unit is manufactured to bespoke project dimensions, VELTOR supports both container-load distributor orders and custom single-project orders (e.g., luxury residential developments or boutique hotels). The practical MOQ is determined by container shipping efficiency, and we assist buyers in consolidating mixed window/door orders into a single FCL shipment.

Q2: How do your vertical sliding windows prevent water leakage during extreme weather?

Our vertical sash windows feature a high-performance stepped sill system with concealed one-way pressure-equalized drainage valves. Combined with continuous EPDM seals and interlock baffle blocks, our systems resist water penetration up to 900 Pa water pressure under laboratory wind-driven rain testing.

Q3: Can your factory manufacture vertical sliding windows to local building code standards?

Yes. We engineer profiles, glass thickness, and balance hardware to match your region's structural wind pressure and thermal requirements. We supply test reports and structural calculation documentation for review prior to mass production (including North American NFRC/ASTM, Australian AS2047, and European CE standards).

Q4: What types of sash balance mechanisms do you offer for vertical sliding sashes?

We provide three primary balancing mechanisms based on sash size and budget: heavy-duty adjustable spiral balances, constant-force spring balances, and traditional counterweight pulley systems. For oversized architectural sashes, we also offer concealed electric motor actuators.

Q5: How does your factory handle surface finish durability for coastal environments?

For harsh marine environments, we recommend PVDF (Fluorocarbon Kynar 500) 3-coat paint finishes or marine-grade anodizing (25 microns). These surface coatings provide superior UV resistance, anti-salt spray durability, and corrosion resistance compliant with AAMA 2605 specs with up to 25 years warranty.

Q6: What is the standard lead time for OEM/ODM aluminum window orders?

Once architectural shop drawings are formally approved and the deposit is confirmed, typical production lead time is 25 to 35 calendar days depending on custom extrusion die creation, finish specifications, and custom glass unit processing.

Start Your Next Project With Foshan’s Window Engineering Experts

Need structural shop drawings, instant factory pricing, or technical system recommendations for your building project? Contact our engineering team today.