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IQ Glass Solutions LTD, Sky House, Raans Road, Amersham, HP6 6FT
Specification
What is a glass to glass corner window?
Is a glass to glass corner structural?
Can a glass to glass corner open?
Can glass to glass corners be triple glazed?
How large can a glass to glass corner be?
Frameless Glass to Glass Corners for Contemporary Architecture
A glass to glass corner window is one of the most striking features in contemporary architecture. By removing the need for a visible corner post, two panes of glass meet directly at the corner of a building, creating uninterrupted views, increased natural light and a completely frameless appearance.
Glass to glass corners are regularly used in luxury homes, contemporary extensions and architect-designed new builds to maximise views and establish a stronger connection between indoor and outdoor spaces.
At IQ Glass, we design, engineer and install bespoke glass to glass corner windows in virtually any size or configuration, including fixed structural glazing, opening corners and integrated sliding door systems.
What is a Glass to Glass Corner Window?
A glass to glass corner window is a frameless glazing detail where two panes of glass are connected directly together using structural glazing silicone rather than a conventional corner post.
The result is a transparent corner with:
- No visible structural mullion
- Minimal visual obstruction
- Views that continue around the corner of the building
- Increased daylight from multiple directions
Because the corner itself is made from glass, the surrounding building structure must be designed to support the loads above the opening.
Frameless Glass to Glass Corner Designs
The most minimal solution is a structural glass corner window using frameless glazing and structural silicone joints.
Each glass pane is manufactured with stepped edges that allow the glass units to be bonded together at the corner. This creates a strong connection while maintaining a clean, frameless appearance.
When combined with our Invisio structural glazing system, all surrounding framework can be concealed within the building finishes, creating a corner that appears to be formed entirely from glass.
This option is particularly popular for; contemporary new homes, luxury extensions, coastal properties, properties with panoramic views and garden-facing elevations
Opening Glass to Glass Corners
A glass to glass corner does not need to be fixed.
Using slim framed sliding doors, an opening corner can be created that allows both elevations to slide away from the corner. When opened, the corner disappears entirely, creating a seamless transition between internal living spaces and external terraces or gardens.
Open corner sliding doors offer:
- Minimal 21mm interlocks
- Flush threshold details
- Large opening sizes
- Enhanced indoor-outdoor living
The opening angle can be tailored to suit the architecture, making opening glass corners suitable for a wide variety of residential and commercial projects.
Glass to Glass Corners for Extensions
A glass to glass corner window is one of the most popular architectural features for modern extensions.
Whether incorporated into a kitchen extension, glass box extension or garden room, removing the corner post allows daylight to enter from two directions.
Many architects use frameless glass corners to:
- Increase natural light levels
- Create a focal point within the extension
- Frame views of the garden
- Introduce a contemporary design element
In conservation areas and listed building projects, glass to glass corners can also provide a clear distinction between original and new architecture.
Structural Requirements for Glass to Glass Corners
One of the most common questions about glass to glass corner windows is how they are supported.
The glass itself does not carry the loads from the building above. Instead, structural loads must be transferred around the opening using engineered support systems.
Depending on the project, this may include:
- Hidden steel goalposts
- Structural steel lintels
- Cantilevered structures
- Structural glass beams
Every glass to glass corner is engineered individually to suit the project requirements, spanning capability and wind load conditions.
Thermal Performance of Glass to Glass Corners
Modern glass to glass corner windows can achieve excellent thermal performance despite their minimal appearance.
Performance can be tailored through:
- Double or triple glazing
- Low-emissivity coatings
- Solar control glass
- Thermally broken fixing systems
IQ's Invisio structural glazing system incorporates a fully thermally broken detail designed for frameless glazing applications.
Glazing specifications can also be adapted to meet Passivhaus, low-energy and high-performance residential requirements.
Acoustic and Security Performance
Glass to glass corners can be specified to achieve enhanced acoustic and security performance without compromising aesthetics.
Options include:
- Acoustic laminated glass
- Security laminated glazing
- Triple glazed units
- Enhanced locking systems
- Blast resistant specifications where required
This allows frameless corner glazing to be used confidently in both urban and rural settings.
Bespoke Glass to Glass Corner Windows
Every project is different and our glass to glass corner windows are completely bespoke.
Design options include any angle for the corner connection, including 90-degree glass corners, angled corner glazing, oriel window designs, corner window seats, integrated opening windows, sliding glass corner doors, and structural glass box extensions.
Our team can advise on the most appropriate solution for your architectural design, structural constraints and performance requirements.
Visit Our Showroom
Several examples of glass to glass corner windows are on display at the IQ Glass Design Centre in Buckinghamshire.
Visitors can view:
- Frameless corner glazing
- Structural glass walls
- Corner sliding door systems
- Oriel windows
- Glass box extension details
Book a showroom appointment to discuss your project with one of IQ's glazing specialists.
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Specification
What is a glass to glass corner window?
A glass to glass corner window uses two panes of glass joined directly together without a visible corner frame or post, creating uninterrupted views around the corner of a building.
Is a glass to glass corner structural?
No. The glass corner itself is not usually responsible for carrying loads from the building. Structural support is provided through steelwork, structural glass elements or other engineered support systems.
Can a glass to glass corner open?
Yes. Glass to glass corners can be created with slim framed sliding doors that move away from the corner, creating a fully open corner design.
Can glass to glass corners be triple glazed?
Yes. Triple glazing can be specified where thermal performance requirements demand enhanced insulation.
How large can a glass to glass corner be?
Maximum sizes depend on glass specification, wind loads and structural support requirements. Large format glass to glass corners can often span multiple storeys when engineered correctly.
Further Reading
A Guide to Corner Glass Windows
Flush Window Designs
Frameless Windows Product Page
Frameless Round Windows
What to Consider When Specifying an Oriel Window