Curved Tempered Glass: Custom Bent Toughened Glass

Curved tempered glass is toughened safety glass bent to a defined radius — used where a façade, balustrade, lift shaft or feature has to follow a curve rather than a flat plane. As a curved glass manufacturer we produce custom bent tempered glass (and curved laminated glass) to your drawing; this guide covers what is possible and what we need to quote.

What we make

Single-curved tempered glass — bent to one radius, for curved façades, balustrades, counters and lift shafts.
Compound / double-curved glass — curved on more than one axis for sculptural façades.
Curved laminated glass — bent panels laminated with PVB or SGP for safety, overhead and balustrade use (this also covers bent laminated glass requirements).
Curved Low-E and curved insulated units — where thermal performance is needed on a curved opening.

Why the drawing matters

Each curved panel is defined by its bending radius, dimensions and glass make-up, and these together decide feasibility — the minimum radius and maximum panel size depend on the thickness and build-up. Rather than publish one figure that will not fit every case, we confirm the achievable radius, maximum size and the best build-up from your drawing, and we will never substitute flat or segmented panels for curved glass without your approval.

What to send for a quote

A drawing per curved panel — bending radius, dimensions and orientation.
Glass make-up — tempered, laminated or insulated, and thickness (or the application, so we can advise).
Quantity and any matching flat panels.
Destination and shipping terms (EXW / FOB) and target date.

How to order

See the single-curved and multi-curved product pages for the specification, then send your curved-panel drawings. We will confirm the radius and size feasibility, the build-up, lead time and EXW / FOB pricing — curved items quoted separately so the costs are clear.

Curved glass specifications

Single-curved tempered glass. Produced in thicknesses from 5 mm to 25 mm. The glass bends to a cylindrical radius — one direction only — and is then tempered. Radius feasibility starts from about 420 mm, though the minimum for a given panel depends on thickness and dimensions. Finish options include clear, low-iron, tinted, ceramic-frit and Low-E coated; panels can be laminated or assembled into curved IGUs. Manufactured to GB 15763.1, EN 12150 and ASTM C1048.

Compound (multi-axis) curved glass. Produced in thicknesses from 5 mm to 19 mm. The glass bends simultaneously on more than one axis — spherical, conical, barrel and free-form profiles are achievable. Each panel is formed to its own pair of radii; tight dimensional tolerance is essential so the panels assemble into a continuous façade. Compound-curved glass can be laminated with PVB or SGP for safety and structural applications. Manufactured to GB 15763.1 and EN ISO 12543.

Sizes. All curved panels are large-format, made-to-order and cut to your drawings. The achievable size depends on the thickness, bending radius and make-up; we confirm this when we review your drawing.

Project references

A high-speed railway station façade required compound-curved tempered glass for the main concourse envelope in two distinct systems: compound-curved Low-E tempered insulating units (curved toughened glass with Low-E coating, sealed into an argon-filled IGU) for the principal glazed skin, and chemically strengthened fire-rated compound-curved tempered panels for zones with fire-resistance requirements. Both systems follow the same curved geometry while delivering entirely different performance functions — a combination that depends on in-house curved forming, coating, IGU sealing and fire-glass processing. Full case: a high-speed railway station façade.

A research-institute façade used ultra-clear double-curved tempered glass as the base for an SGP-laminated curved insulating unit. The curved plies were produced from low-iron glass, tempered after bending, laminated with a 2.28 mm SGP interlayer for structural post-breakage performance, then sealed into an insulating unit. That build — curved, ultra-clear, SGP-laminated, insulated — means every step in the process had to land on the same compound-curved geometry. Full case: a research-institute façade.

Frequently asked questions

What is the minimum radius for curved tempered glass? As a general guide, single-curved tempered glass can be produced from about 420 mm radius. The minimum achievable for a specific panel varies with glass thickness and pane dimensions. Send your drawing with the target radius and we will confirm feasibility.

Can curved glass be laminated or made into an insulated unit? Yes. Curved tempered plies can be laminated with PVB or SGP interlayers. They can also be sealed into curved insulating units (curved IGUs) where thermal performance is required, as demonstrated in both project references above.

What is the difference between single-curved and compound-curved glass? Single-curved (cylindrical) glass bends in one direction, like a section of a cylinder. Compound-curved glass bends on two or more axes simultaneously — spherical, free-form or barrel profiles. See the single-curved and multi-curved pages for further detail.

Which standards is curved tempered glass produced to? Single-curved tempered glass is manufactured to GB 15763.1, EN 12150 and ASTM C1048. Compound-curved laminated glass is manufactured to GB 15763.1 and EN ISO 12543.

Send your curved-panel drawings and we will confirm the radius, size feasibility, build-up, lead time and EXW / FOB pricing.

Related reading on curved and bent glass: