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KINGSTAR GLASS
Glass Roof | Structural Overhead Glazing Solutions for Architectural Buildings from KINGSTAR BUILDING GLASS
KINGSTAR BUILDING GLASS Glass Roof solutions are high-performance structural overhead glazing systems engineered to transform architectural spaces through natural daylighting. Designed for both commercial and residential applications, our glass roof panels combine tempered safety glass, laminated interlayers, and insulated glass units (IGUs) to deliver exceptional thermal performance, structural integrity, and visual clarity. Every glass roof solution is engineered to meet international overhead
What is a Glass Roof?
A glass roof—also referred to as overhead glazing, structural glass roof, or skylight system—is a load-bearing glass construction installed in a building's roof structure to introduce natural daylight into interior spaces. Unlike vertical glazing, glass roofs must withstand significant additional loads including self-weight (dead load), maintenance loads, water accumulation, snow, and wind pressure. Glass roofs are available in fixed (non-opening) configurations, as well as opening or sliding systems, and can accommodate complex geometries including ridgelights, pyramids, domes, barrel vaults, and canopies. When a glass roof forms part of an accessible area, it must be treated as a glass floor with corresponding load-bearing requirements.
Glass Roof Configurations
KINGSTAR BUILDING GLASS offers multiple glass roof configurations to match different performance requirements, building types, and climate conditions:
| Configuration | Composition | Key Characteristics | Best For |
|---|---|---|---|
| Tempered Laminated IGU | Outer tempered pane + PVB interlayer + inner laminated pane + argon-filled cavity | Safety, thermal insulation, UV protection | Commercial skylights, overhead glazing |
| Tempered IGU | Outer tempered pane + argon-filled cavity + inner heat-strengthened laminated pane | Thermal efficiency, solar control | Energy-efficient buildings, Passivhaus projects |
| Laminated Glass Roof | Two or more glass layers bonded with PVB or ionomer interlayer | Post-breakage integrity, safety | Residential skylights, canopies |
| Triple Glazed IGU | Three glass panes with two argon-filled cavities | Maximum thermal insulation | Cold climates, extreme energy performance |
| Point-Supported Glass Roof | Tempered laminated panels with stainless steel point fittings | Frameless aesthetic, large spans | Architectural statement roofs, canopies |
Safety Standards for Overhead Glazing
Architects and designers must consider relevant international and local glazing standards for overhead glazing, which classify building types into different load levels and provide guidance on maximum allowable deflections and stresses. KINGSTAR BUILDING GLASS glass roof solutions comply with:
- EAD 220025-00-0401: European Assessment Document for cantilevered structural horizontal glazing (structural glass canopy/roof)
- EN 12150: Thermally toughened soda-lime silicate safety glass
- EN 12600: Glass in building - Pendulum test - Impact test method and classification
- EN 13031-1: Greenhouses - Design and construction (applicable to glass roof structures)
- CWCT Glass Classifications: Class 0, 1, 2, and 3 standards for overhead glazing fragility
- ACR (M) 001: Advisory Committee for Roof Safety - Red Book for non-fragility testing
- JGJ 255-2012: Chinese technical specification for skylights and metal roofs
- JG/T 231-2018: Chinese technical requirements for architectural glass skylights
Safety Glass Requirements for Roof Glazing
For overhead glazing, safety is paramount. International standards recommend specific glass configurations:
- Single glazing: Should ideally use glass that remains in position post-breakage, such as laminated safety glass
- Double glazed units: Should have safety glass as the lower pane
- Insulating glass units (IGUs): The internal pane must be laminated glass (preferably heat-strengthened) and the outer pane must be fully tempered
- Sloped patent glazing: Historically installed at a minimum thickness of 6mm
- Skylight glass: Recommended outer pane should be toughened, heat soak tested, and laminated, typically with three glass layers for a total thickness of 25mm to 49mm (or more in extreme situations)
Thermal Performance
Glass roofs are directly exposed to the sun for a high proportion of the day, making careful glass selection crucial to prevent excessive heat gain from offsetting daylighting benefits. KINGSTAR BUILDING GLASS offers high-performance glazing solutions with:
- U-Value: From 1.1 W/m²K down to 0.6 W/m²K for premium configurations
- Solar Heat Gain Coefficient (SHGC): As low as 0.25 for warm climates to limit overheating
- Visible Light Transmission (VLT): 24-30% recommended for visual comfort and reduced glare
Thermal Performance Comparison
| Glass Roof Configuration | U-Value (W/m²K) | SHGC | VLT | Typical Application |
|---|---|---|---|---|
| Single Clear Glass | 6.2 | 0.80 | 89% | Basic residential skylights |
| Tempered IGU (Clear) | 2.8 | 0.60 | 78% | Standard commercial glazing |
| Low-E Tempered IGU | 1.8 | 0.35 | 62% | Energy-efficient buildings |
| Low-E IGU + Laminated Inner | 1.4 | 0.28 | 55% | High-performance commercial |
| Triple Glazed Low-E IGU | 0.79 | 0.25 | 30-50% | Passivhaus, extreme climates |
Passivhaus-certified glass roof systems can achieve a heat transmission coefficient (UCWi) of 0.79 W/(m²K), corresponding to a minimum interior surface temperature of 14.8°C—ideal for comfort and energy savings.
Technical Specifications
| Parameter | Specification |
|---|---|
| Glass Thickness | 3mm – 19mm (monolithic); laminated combinations available |
| Maximum Panel Size | Up to 3300mm × 6000mm (annealed); up to 2250mm × 3500mm (tempered) |
| Minimum Panel Size | 300mm × 300mm |
| Roof Pitch Range | Flat (2° minimum for drainage) up to 90° |
| Glass Types | Clear Float, Low-Iron, Tinted, Patterned, Low-E Coated |
| Interlayer Options | PVB (0.38mm, 0.76mm, 1.52mm), Ionomer (SGP), EVA |
| Cavity Gas Fill | Air, Argon (90%), Krypton |
| Cavity Width | 6mm, 9mm, 12mm, 14mm, 16mm |
| Safety Glass Types | Tempered (EN12150), Heat-Strengthened, Heat-Soak Tested, Laminated |
| Available Configurations | Monolithic Laminated, Tempered IGU, Laminated IGU, Triple Glazed |
| Processing Options | Cutting, Edge Grinding, Drilling, Notching, Tempering, Laminating, IGU Assembly, Silk-Screen Printing, Bending |
| Certifications | EAD 220025, EN12150, EN12600, EN13031-1, CE, ISO 9001, JGJ255, JG/T231 |
| Lead Time | 15-25 days after order confirmation |
| Packaging | Interleaving paper, protective film, wooden crates, edge protectors |
Key Features
- Structural Strength: Engineered to withstand dead loads, live loads, snow, wind, and maintenance loads
- Post-Breakage Safety: Laminated interlayers retain glass fragments, preventing fall-through hazards
- Thermal Insulation: Low U-value configurations significantly reduce heating and cooling costs
- Solar Control: Low SHGC options limit overheating in sun-exposed installations
- Daylight Harvesting: Maximizes natural light penetration, reducing artificial lighting needs
- UV Protection: Laminated interlayers block up to 99% of harmful UV radiation
- Acoustic Insulation: Laminated and IGU configurations provide superior sound reduction
- Design Flexibility: Available for flat, low-pitch, sloped, curved, and complex geometries
Applications
- Commercial Buildings: Shopping centers, office atriums, airport terminals, hotels
- Residential Properties: Skylights, sunrooms, conservatories, patio covers
- Public Buildings: Museums, hospitals, schools, sports stadiums
- Architectural Features: Glass canopies, entrance shelters, covered walkways
- Transportation Hubs: Train stations, airport terminals, bus shelters
- Cultural Buildings: Theaters, galleries, exhibition halls
- Educational Facilities: University buildings, libraries, research centers
Design Options
KINGSTAR BUILDING GLASS offers extensive design flexibility for glass roof projects:
- Structural Systems: Mullion-and-transom, point-supported, frameless, structural silicone glazing
- Geometric Forms: Flat, pitched, barrel-vaulted, domed, pyramidal, free-form
- Aesthetic Finishes: Clear, frosted, patterned, silk-screen printed, tinted
- Integrated Solutions: BIPV (building-integrated photovoltaics), dynamic glazing, fire-rated glazing
Why Choose KINGSTAR BUILDING GLASS Glass Roof Solutions?
- Comprehensive Safety Compliance: Products meet EAD 220025, EN12150, EN12600, CWCT, and ACR non-fragility standards
- Complete Processing Capabilities: Tempering, laminating, IGU assembly, and custom fabrication under one roof.
- Thermal Performance Expertise: Tailored U-value and SHGC configurations for any climate zone.
- Design Flexibility: Custom sizes, shapes, geometries, and aesthetic finishes available.
- 10 Years of Industry Expertise: With a decade of dedicated experience in architectural glass manufacturing and export, KINGSTAR BUILDING GLASS has delivered glass roof solutions to landmark projects across North America, Europe, the Middle East, and Southeast Asia. Our technical team provides expert guidance on glass selection, structural requirements, and installation specifications.
- Quality Assurance: Strict quality control from raw material selection to final packaging—consistent dimensions, reliable processing, and smooth installation.
Ready to bring natural light into your next project with a high-performance glass roof? Share your design requirements with our technical team for custom overhead glazing solutions. We'll provide structural calculations, thermal performance simulations, and a competitive quote tailored to your specifications—with fast turnaround times backed by a decade of architectural glass expertise.
Frequently Asked Questions (FAQ)
Q1: What is the difference between a glass roof, a skylight, and a glass canopy?
A: A glass roof typically refers to a structural overhead glazing system that forms part of the building's primary roof structure—often spanning large areas and supporting significant loads. A skylight is generally a smaller, localized opening in the roof designed to bring light into a specific area. A glass canopy is an overhead glass structure that projects from a building facade, typically covering entrances, walkways, or outdoor areas without forming part of the primary building envelope. All three can be manufactured using similar glass technologies (tempered laminated IGUs), but differ in scale, structural requirements, and application.
Q2: What safety glass configurations are required for overhead glazing?
A: For overhead glazing, international standards require specific safety configurations. For single glazing, laminated safety glass that remains in position post-breakage is recommended. For insulating glass units (IGUs), the internal pane must be laminated glass (preferably heat-strengthened) and the outer pane must be fully tempered. For skylights, the outer pane should be toughened, heat soak tested, and laminated—typically with three glass layers for a total thickness of 25mm to 49mm. In China, when the glass roof is more than 3 meters above the ground, laminated glass or laminated IGUs with the interlayer on the underside are required.
Q3: What U-value and SHGC should I specify for my glass roof project?
A: The optimal U-value and SHGC depend on your climate zone, building orientation, and energy code requirements. In warm climates where roof glazing is exposed to the sun year-round, a maximum SHGC of 0.25 is recommended to limit overheating. For visual comfort and reduced glare, VLT of 24-30% is recommended. For cold climates or Passivhaus projects, U-values as low as 0.79 W/m²K are achievable. KINGSTAR BUILDING GLASS can provide thermal performance simulations tailored to your specific project location and requirements.
Tempered or toughened glass is a type of safety glass processed by controlled thermal or chemical treatments to increase its strength compared with normal glass. Tempering puts the outer surfaces into compression and the interior into tension. Such stresses cause the glass, when broken, to shatter into small granular chunks instead of splintering into jagged shards as ordinary annealed glass does. The granular chunks are less likely to cause injury.
No tong marks on the glass as adopts the horizontally tempering process.
5 times harder than ordinary annealed glass.
Once breakage occurs, the glass disintegrates into small cubical fragments which are relatively armless to human body.
It withstands abrupt change of temperature. For example, a piece of 5mm tolerate the temperature variations within the range of 200°C.
Tempered glass should under go heat soak test to improve safety in use.
Thickness: 3-19mm
Size: Min size 300*200mm,Max size 3300*15000mm
Tempered glass is used for its safety and strength in a variety of applications, including passenger vehicle windows, shower doors, aquariums, architectural glass doors and tables, refrigerator trays, mobile phone screen protectors, bulletproof glass components, diving masks, and plates and cookware.
Kingstar Building glass: www.kingstar-glass.com
Kinstar Glassware (Professional Glassware & Kitchen Storage): www.kingstarliving.com
Kingstar Building glass:
Email: eric@kingstar-glass.com
Kingstar Glassware
(Professional Glassware & Kitchen Storage):
Email: info@kingstar-glass.com
Address: NO.101 SHENZHEN ROAD, QINGDAO, CHINA
© 2022 Qingdao Kingstar Glass Co., Ltd . All rights reserved Site Map | Technical Support:weidongli
Building glass:
Wechat/Whatsapp: 008618562697682
Email: eric@kingstar-glass.com
Glassware please visit: www.kingstarliving.com
Wechat/Whatsapp: 008615063091883
Email: info@kingstar-glass.com
Address: NO.101 SHENZHEN ROAD, QINGDAO, CHINA
© 2022 Qingdao Kingstar Glass Co., Ltd . All rights reserved Site Map
