Toughened Glass Price per Sq Ft – 2026 Rate List (4mm to 22mm)

Toughened glass is float glass that has been heated close to its softening point and then cooled fast with jets of air, which locks the surface in compression. That makes it about 5 times stronger than the same glass untoughened, and if it does break, it falls into small, blunt pieces instead of sharp shards. It is also called tempered glass.

Yes. CLSG architectural safety glass is certified by the Bureau of Indian Standards (BIS) under IS 2553 (Part 1), the Indian standard for safety glass used in buildings. We make it at our plant in Sonepat, Haryana, from Saint-Gobain India float glass. Ask our team for a copy of the current certificate with your quote.

Look for the manufacturer's mark in one corner of the pane; glass toughened at our plant carries the CLSG mark. The edges are usually ground smooth, because toughened glass cannot be cut after toughening. Through polarised sunglasses, held at an angle, toughened glass often shows faint dark patches or stripes left by the quench. Normal glass does not.

It depends on the thickness and finish. Saint-Gobain India makes the float glass, and a processor such as CLSG toughens it. We use 100% Saint-Gobain India float, so our rate list is the Saint-Gobain toughened glass price: for example ₹80–83 per sq ft for 6mm clear and ₹150–152 for 12mm clear.

5mm toughened glass costs ₹68–70 per sq ft in clear and 6mm toughened glass costs ₹80–83 in clear; frosted and tinted or reflective are quoted on request. Rates are ex-works Sonepat, excluding GST and transport. Holes, cut-outs and special edges are quoted on top.

Frameless doors and railings usually take 12mm toughened glass, from ₹150–152 per sq ft in clear. For all 12mm finishes, sizes and weights, see our 12mm toughened glass price page.

Neither, because they are the same product. Tempered and toughened both describe float glass that has been heated and quenched for strength and safe breakage; tempered is the common term in the US, toughened in India and the UK. Compare thickness, size and the manufacturer's mark instead of the name.

Yes, toughened glass can break, usually from a hard knock on an edge or corner, but it breaks into small, blunt pieces rather than long, sharp shards. That is why it is used as safety glass in doors, shower screens and railings. Where a broken pane must stay in place, such as overhead glass, choose toughened laminated glass.

No. Cut toughened glass is not possible after toughening: it cannot be cut, recut, drilled or edged once it is toughened, and it will shatter. Every cut, hole, notch and edge polish is done on the float glass before it goes into the furnace, which is why we ask you to share exact finished sizes in millimetres, with the positions of any holes or cut-outs, before we quote. Cut-to-size orders are welcome and have no minimum.

Yes. 6mm float glass can be toughened, and 6mm toughened glass costs ₹80–83 per sq ft in clear. It suits windows, shelves, tabletops and furniture; for doors and railings, 10mm or 12mm is the usual choice.

By make-up there are two: single toughened glass, and toughened laminated glass, which is two toughened panes bonded with an interlayer. Both come in clear, frosted, tinted and reflective finishes, and in flat or bent shapes.

Not especially. Toughened glass has the same surface hardness as normal glass, so grit or sharp metal can scratch it, and a deep scratch cannot be polished out the way it sometimes can on annealed glass. Wipe with a soft cloth and clean water, and avoid dragging abrasive particles across the surface.

Usually, yes. Sliding doors in homes and offices use toughened glass, commonly 8mm to 12mm depending on the panel size and the frame or track. Check that the pane carries the manufacturer's mark.

There is no single answer, so compare on facts you can check. Ask which float glass the processor uses, look for the processor's mark on the pane, ask for a current BIS certificate, check the largest size the plant can toughen in one piece, and compare quotes on the same thickness, finish and edge work. CLSG toughens 100% Saint-Gobain India float glass at its plant in Sonepat.

Toughened glass price per square feet depends on thickness and finish: about ₹56 to ₹152 for 4mm to 12mm single toughened and ₹220 to ₹450 for 9.52mm to 22.28mm toughened laminated (ex-works, excluding GST and transport). The rate list gives the figure for each thickness.

Tuffen glass is a common spelling of toughened glass, also called tempered glass, so the rates are the same: from ₹56–58 per sq ft for 4mm clear to ₹150–152 per sq ft for 12mm clear (excluding GST and transport). See the rate list for each thickness and finish.

Roofs, canopies and skylights normally use toughened laminated glass so a broken pane stays in place. The toughened glass for roof price runs from about ₹255–265 per sq ft for 11.52mm clear to ₹320–330 for 17.52mm clear (excluding GST and transport); the supporting frame decides the thickness.