Sustainability

VacStar Vacuum Glass Glazing Retrofit for Sustainable Excellence

VacStar Vacuum Glass Glazing Retrofit

South Star Glass is pioneering the future of building retrofits with its innovative architectural VacStar vacuum glass manufacturing. By integrating advanced vacuum technology into glazing solutions, we deliver unmatched energy efficiency while preserving the character and functionality of existing buildings.

❄️ Superb Insulating Performance

VacStar Vacuum glass achieves extraordinary thermal insulation, with U-values as low as 0.3 W/m²·K. This performance far surpasses conventional double glazing, dramatically reducing heat transfer and enabling significant energy savings.

For building owners, this means lower operating costs and improved comfort without the need for full façade replacement.

🔒 Enhanced Retrofit Capabilities

South Star’s VacStar vacuum glass can be seamlessly combined into secondary glazing systems, offering a holistic upgrade for existing structures.

Beyond insulation and shading improvements, this approach enhances security and acoustic performance, making retrofitted buildings quieter, safer, and more energy-efficient.

🏗️ Prestigious Project Applications

The effectiveness of South Star’s vacuum glass retrofit solutions is already proven in landmark projects worldwide:

Regent Hotel

Elevating guest comfort with discreet energy-saving upgrades.

Citibank Headquarters

Achieving sustainability goals while maintaining corporate aesthetics.

Hong Kong Jockey Club HQ

Combining performance with prestige in a high-profile retrofit.

Pacific Place 2 Office

Delivering efficiency and acoustic control for modern workspaces.

Legacy Golf Club, Bangkok Thailand

Enhancing guest comfort through unobtrusive, energy-efficient improvements.

🌍 Recognition of Excellence

VacStar vacuum glass has been awarded the HKGBC Green Product Certificate at Platinum grade, the highest level in the certification scheme.

In addition, this retrofit solution earned a Merit Award in the Green Building Award 2023 organized by the Hong Kong Green Building Council, underscoring its leadership in sustainable innovation and industry impact.

📖 What is VacStar vacuum glass glazing retrofit?

VacStar Vacuum glass glazing retrofit is a sustainable upgrade method that adds high-performance vacuum insulating glass to existing windows or curtain walls, dramatically improving energy efficiency, comfort, and safety without changing the existing glazing.

In retrofit applications, VIG is installed as secondary glazing on the interior side of existing windows or curtain walls. It is increasingly used in Hong Kong and other dense urban environments to modernize older buildings while reducing carbon emissions.

⚡ Key Benefits

Energy Efficiency: Reduces solar heat gain by up to 70% and cooling energy load by as much as 30% in typical buildings.
Acoustic Comfort: The vacuum layer also blocks sound transmission, improving indoor quietness.
Safety & Security: Can be combined with laminated structures for impact resistance and compliance with building codes.
Sustainability: Retrofit avoids removing existing windows, minimizing waste sent to landfill.

🏗️ How It Works

A secondary VacStar vacuum glass unit is mounted on the frame or wall inside the existing glazing.
The system creates a sealed cavity, effectively forming a triple-insulated glass system.
No additional structural load is placed on the original glass, making it suitable for retrofit in hotels, offices, and heritage buildings.

In summary: VacStar Vacuum glass glazing retrofit is a cost-effective, low-disruption way to upgrade existing buildings with world-class insulation, shading, acoustic, and safety performance—helping cities like Hong Kong advance toward net-zero goals while preserving architectural assets.