Horizontal Folding Window

Product Overview

The Horizontal Folding Window is an engineered solution for architects and builders seeking to transform wide wall openings into fully ventilated spaces. Its accordion-style multi-panel mechanism allows all sashes to fold and stack neatly to one side, delivering an unobstructed passage of air and light that conventional windows simply cannot match.

Whether applied in residential balconies, commercial storefronts, or hospitality venues, this window system redefines the boundary between interior and exterior environments.

Key Feature Checklist

Before specifying this product for your project, review the following feature inventory to confirm it meets your performance and design requirements:

• Panel Count Flexibility — Available in 2-panel to 8-panel configurations, adaptable to openings from 2 meters to over 8 meters wide.
• Aluminum Alloy Frame — Constructed from 6063-T5 extruded aluminum with thermal break, ensuring structural rigidity and corrosion resistance for decades.
• Double-Pane Tempered Glass — Standard 5mm+12A+5mm insulated glass unit; upgradeable to triple glazing or laminated safety glass.
• Smooth Rolling Track — Stainless-steel roller carriage on precision-machined aluminum track guarantees effortless one-hand operation even for large panels.
• Multi-Point Locking — Each panel engages a mushroom-head lock point into the frame, providing wind resistance up to Grade 12 (≥5.0 kPa).
• Weather Sealing — Triple EPDM gasket system at frame-sash, sash-sash, and track interfaces achieves air infiltration ≤0.5 m³/(m·h).

Performance Specifications

Each performance parameter has been validated through third-party laboratory testing in accordance with relevant ASTM and EN standards:

• Air Permeability — Class 4 (EN 12207), equivalent to ≤0.5 m³/(m·h) at 100 Pa reference pressure.
• Water Tightness — Class 9A (EN 12208), tested at 600 Pa without water penetration to the interior face.
• Wind Load Resistance — Class C5 (EN 12210), certified for positive and negative pressure at 3.0 kPa / 5.0 kPa respectively.
• Thermal Transmittance — U-value as low as 1.8 W/(m²·K) with thermal-break profile and Low-E glass combination.
• Acoustic Insulation — Rw ≥ 35 dB with standard double glazing; up to Rw 42 dB with laminated asymmetric IGU.
• Operation Cycle Durability — Tested to 25,000 open-close cycles without functional degradation (EN 13115).

Finish and Color Options

The aluminum frame is available in a comprehensive palette to complement any architectural language:

• Powder-Coated Finishes — Standard RAL colors including Anthracite Grey (7016), Signal White (9003), and Black (9005); custom RAL matching available for orders exceeding 200 m².
• Anodized Finishes — Clear anodized, champagne, bronze, and black anodized options with 20μm minimum coating thickness.
• Wood-Grain Transfer — Sublimated wood-grain film in oak, walnut, and teak patterns for projects requiring a warm aesthetic without the maintenance of natural timber.

Application Scenarios

This horizontal folding window system excels in the following use cases:

• Residential Balcony Enclosures — Fully open the balcony to the living room during pleasant weather; seal it tight during storms or extreme temperatures.
• Restaurant and Café Terraces — Create a flexible boundary that can be completely opened for al-fresco dining season and closed for climate-controlled comfort.
• Hotel Lobby and Event Spaces — Merge indoor event areas with outdoor gardens or pool decks for seamless large-scale gatherings.
• Commercial Showrooms — Maximize street-front visibility and pedestrian flow by folding the entire façade panel system outward.

Installation and Maintenance Notes

Proper installation is critical to achieving the rated performance. The following points should be observed by the installation team:

• Opening Preparation — The structural opening must be square within ±3 mm tolerance; sill must be level and capable of bearing the total panel weight (approximately 35 kg per panel).
• Track Alignment — Top and bottom tracks must be co-planar; use laser level during installation and verify after fastener tightening.
• Sealant Application — Apply neutral-cure silicone sealant between the frame and structural opening; do not use acidic sealants that may corrode the aluminum surface.
• Routine Maintenance — Clean tracks quarterly with a soft brush; lubricate roller carriages with silicone spray annually; inspect EPDM gaskets for compression set every 5 years.