Fluid Glass Corner: Frameless Glass-to-Glass Corner Windows
Fluid Glass Corner
Guide price: £800 – £1,200 / m² approx.
UK installation. Final price on quotation.
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Frameless Corner Windows
No Corner Post
Fluid Glass Corner offers frameless glass-to-glass corner windows that eliminate the traditional corner post, creating a seamless visual connection around building corners. These innovative corner windows maximize natural light from two directions, flooding interior spaces with more light and enhancing panoramic views. Ideal for open plan living spaces, garden rooms, and contemporary homes, the frameless design creates a real wow factor and a strong focal point.
Each corner window is custom-built to fit any angle required by the site, not just the standard 90 degrees, allowing for versatile architectural applications including renovation projects and new build projects. The glass itself does not carry structural loads; instead, concealed steel goalposts or cantilevered roofs provide the necessary support, ensuring the building's structural integrity.
Fluid Glass Corner windows use advanced double or triple glazing with laminated glass options to deliver excellent thermal performance and low maintenance. Aluminium and timber frame choices also influence the overall look, with anthracite grey a popular aluminium finish for modern projects. The structural silicone joint between panes ensures a weather-tight, durable seal with a sleek, contemporary appearance. While the corner itself is fixed, opening windows or sliding doors are installed on the adjoining elevations for ventilation and access, maintaining a seamless connection between interior spaces and the surrounding landscape.
These corner windows are part of the fastest growing glazing trends, offering homeowners and architects an incredibly versatile solution to create bright, open spaces that maximize daylight and panoramic views, while enhancing the home's interior with a modern, minimalistic glass detail. Modern corner windows are available in frameless, framed, bay, and floor-to-ceiling designs. Choosing the right corner window can also add property value through its architectural impact.
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Technical Specifications
Specification | Fluid Glass Corner |
|---|---|
Corner joint | Structural silicone, glass to glass, no post |
Corner angle | 90 degrees or any angle the site requires. |
Glass unit thickness | Up to 69mm triple glazed, 54mm double glazed |
Whole-window U-value (Uw) | 0.9 W/m²K triple glazed on a Ug of 0.6, 2 × 2m basis; 1.1 W/m²K double on a Ug of 1.0 |
Polyamide thermal break | 30mm on the large profile, 15mm on the standard |
Wind load | Tested to 1.6 kN/m² |
Deflection | 0.055mm at 3300N; 0.55mm at 5000N |
Base detail | Thermally broken channel recessed into the base build-up |
Safety glass | Toughened or laminated; laminated at low level per Approved Document K and BS 6262-4 |
Structural support | Concealed steel goalpost, LVL, or cantilevered roof. Designed by the project engineer. |
Silicone joint warranty | 25 years |
Frameless corner windows
Two panes meeting with no post between them
A frameless corner joins two panes at the building corner with a high-modulus structural silicone joint in place of a post. The view runs continuously around the corner for unobstructed views, and light enters the room from two aspects rather than one. It is the detail people are buying when they say they want a glass corner window: everything else on this page exists to make it stand up.
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Corners are built to whatever angle the site requires
The corner does not have to be 90 degrees
At Rusty House in Peckham the boundary line dictated 77 degrees, and that angle turns the outlook along the garden and away from the neighbouring window, using different angles to improve privacy and outlook — which is frequently the reason a corner works at all on a tight urban plot. It can also be positioned to catch more daylight as the sun moves through the day. Unusual geometry is where most suppliers stop and where the survey earns its money.
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A solution for every scenario
The glass is not holding the building up
Removing the corner of a load-bearing wall means the wider building structure needs another way to carry what it held. In most houses that is a steel goalpost — a special structural frame with two posts set back inside the adjacent walls and a beam across — or, on single-storey rooms, a cantilevered roof so the loads never reach the corner. The silicone joint is a weather seal and a bond, not primary structure. Corner windows structural performance must be planned early with the project engineer. New steel needs padstones and sometimes checked foundations, with the existing structure taken into account, so this is a Building Control job, not a window swap. Proper sealing and installation require professional expertise.
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Highly performant
Units to 69mm and a whole-window U-value of 0.9
For corner glazing and glass to glass corners, insulated units run to 69mm triple glazed, reaching a whole-window U-value of 0.9 W/m²K — frame and glass together, on a 2 × 2m window with a glass U-value of 0.6, with units available up to 2400 mm high. Double glazed it is 1.1 on a Ug of 1.0. Those are Uw figures, not centre-pane. Low-E coatings help reduce heat loss and improve energy efficiency. Warm-edge spacers and argon fills handle the unit; a 30mm polyamide thermal break and a thermally broken channel at the floor handle the junctions, where a badly detailed corner can condense in winter.
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Fixed by definition, with the openings beside it
Fixed by definition, with the openings beside it
A silicone corner is fixed — there is no mechanism in it. Ventilation and access go on the elevations either side, usually a sliding door running straight into the corner so the room opens fully in summer and reads as one sheet of glass when closed. At Beulah Walk that is exactly the arrangement. If the corner itself has to open, it is designed as an open-corner sliding door from the start rather than asking a fixed corner to do a job it cannot.
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Preserving unobstructed views
Overheating is an orientation problem, not a glass problem—preserving unobstructed views
A corner has two faces, so corner windows create maximum light in the room, with a south face and a west face loading it at different times and for longer than a single window would. A g-value of 0.35 cuts solar gain by roughly two thirds against clear glass, but the datasheet describes a square metre of glass, not a corner of a living room at five o'clock in July. Unshaded south-west corners need solar control glass, external shading or an opening at high level. Part O now requires this to be demonstrated on new dwellings, while still creating bright interior spaces.
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Surveyed, supplied and installed by us
Where we have built them: case studies
A frameless corner, or frameless corner glazing, is the least forgiving detail we build: the two panes must meet to within a few millimetres and the silicone is applied on site. We survey, supply and install fixed corners, so the dimensions that size the panels and the team that sets them are the same. Large units frequently need a crane or a glass-lifting robot — on a terraced street that means a road closure and a day's hire, planned at survey rather than discovered on delivery. That is why homeowners should choose corner windows with specialist survey, design, and installation support.
Rusty House, Peckham — a 77-degree corner set by the boundary, triple glazed throughout, the dark frame set against weathered Corten cladding.
Orchard House, Chichester Harbour — the kitchen corner looks along the garden and out to the harbour at once.
Jerningham Road — a rear extension on a tight urban plot, daylight maximised without increasing the footprint.
Beulah Walk — a fixed glass-to-glass corner running straight into a sliding door.
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FAQ
FAQ
Two glazed units meeting at the building corner with a structural silicone joint instead of a post, so the view runs unbroken around the corner. This is also the detail typically used for frameless corner windows.
Yes. The glass carries no building loads. A concealed steel goalpost, an LVL or a cantilevered roof takes what the corner of the wall was holding, designed by the project engineer.
Yes. We have built one at 77 degrees where the boundary required it, and the angle is often what makes a corner work on a tight site.
No — a silicone corner is fixed. Openings go on the elevations either side. A framed alternative may include a visible post at the corner. If you need to walk out through the corner, it is designed as an open-corner sliding door from the outset.
Triple glazed, 0.9 W/m²K for the whole window on a Ug of 0.6 at 2 × 2m. Double glazed, 1.1 W/m²K.
It can, on an unshaded south or west corner, because two faces load the room for longer than one. Solar control glass, external shading or high-level ventilation solves it, and Part O requires this to be demonstrated on new dwellings.
Yes, but it is a project rather than a window swap. The existing structure needs to be assessed before the design starts. A structural engineer designs the frame that replaces the corner, and the floor is usually taken up and reinstated around the channel.
It depends on size, specification and support, but styles include frameless, framed, bay, and floor-to-ceiling designs. In most cases, framed options are usually less expensive.
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