
Framed Glass Double Glazed Stacking System - SF35
The SUNFLEX SF35 Framed Glass Stacking System combines slimline aluminium profiles with 18mm or 20mm insulated double glazing, delivering greater thermal comfort, energy efficiency, acoustic performance and weather protection without compromising open-plan living.
Built on the proven SUNFLEX Slide and Turn System, Individual panels slide, turn and stack neatly to one side, opening almost the entire span. Flexible configurations, including inward or outward stacking and faceted layouts, give you design freedom across patios, balconies, entertainment spaces and primary entrances.
With secure keyed access from inside and outside, precision stainless steel running gear and durable aluminium construction. The SF35 combines German engineering with local manufacturing to create year-round comfort, energy efficiency and exceptional weather performance.
- Wind load resistance & weather tightness in compliance with both South African & International Standards
- Airborne sound insulation compliance
- Energy and glazing compliance with SANS


Comfort Without Compromise
KEY PRODUCT FEATURES
Framed Glass Double Glazed Stacking System - SF35

Intelligent Slide-and-Turn Operation
The SF35 combines the flexibility of a slide-and-turn system with the performance of a premium insulated aluminium door. Each panel slides independently before pivoting and stacking neatly to one or both sides, allowing almost the entire opening to be cleared. Whether used as a patio enclosure or a primary entrance door, the system delivers smooth, effortless operation every day.
Key Specifications
- Top-hung slide-and-turn system
- Stack to one or both sides, inward or outward
- Left or right opening configurations
- Straight, corner and faceted layouts
- Precision stainless steel running gear
- Precision-engineered stainless steel running gear

Double Glazing
The SF35 combines insulated double glazing with slimline aluminium framing to reduce heat transfer and create a more comfortable, energy-efficient living environment throughout the seasons.
Key Specifications
- 18mm or 20mm insulated double glazing
- Optional Argon gas insulation
- Improved energy efficiency and thermal comfort

Weather Protection
Engineered for exposed environments, the SF35 Double-Glazed Stacking System delivers exceptional resistance to wind and driving rain, creating a comfortable, protected interior through changing weather.
Key Specifications
- Independently tested wind and rain performance
- Integrated track drainage
- Designed for demanding coastal environments

Secure by Design
The SF35 combines refined design with practical everyday security. Keyed access from both inside and outside provides convenient entry, while a dual-point locking system secures the panels at the top and bottom of the frame.
Key Specifications
- Keyed access from inside and outside
- Dual-point locking mechanism
- 18mm or 20mm insulated toughened safety glass

Engineered for Long-Term Performance
The SF35 combines German engineering with durable, corrosion-resistant materials for smooth, reliable performance with minimal maintenance — even in demanding coastal environments.
Key Specifications
- Corrosion-resistant aluminium
- Premium stainless steel running gear
- Designed for coastal environments

Acoustic Comfort
The SF35 combines insulated double glazing with precision framing to reduce external noise, creating a quieter, more comfortable indoor environment without compromising natural light or expansive views.
Key Specifications
- Excellent acoustic insulation
- Airborne sound insulation up to Rw 30 dB, tested in accordance with DIN EN ISO 140-3*
Actual acoustic performance depends on the glazing specification.
DISCOVER
The Framed Glass Double Glazed Stacking System - SF35

Speak to a Sunflex Specialist
From concept to installation, our experienced team can help you find the right Sunflex solution for your project. With a nationwide network of branches and authorised agents, we’re ready to assist wherever your project is located.
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