How Thick Should a Tempered Glass Door Be?

Which tempered glass door thickness do you need? Compare 10mm, 12mm and 15mm by door size, weight and hardware.

· 4 min read
Three tempered glass door samples of different thickness side by side

Three Thicknesses, Three Jobs

Nearly every tempered glass door we fabricate is 10mm, 12mm or 15mm, and each thickness has a natural territory. The panel must be stiff enough not to flex in use, heavy enough to feel solid, and light enough that its hardware survives — thickness is how those three demands get balanced.

Edge view comparing 10mm, 12mm and 15mm glass

ThicknessTypical applicationsCharacter
10mmInterior doors, office partitions, shower doorsLighter, economical, easy on hardware
12mmShopfronts, main doors, most commercial entrancesThe all-round workhorse
15mmLarge main entrances, tall leaves, prestige frontagesMaximum stiffness and presence

10mm suits interior and lighter-duty doors: office partition doors, meeting rooms, residential room dividers and most shower applications. It keeps weight down, which keeps hinge and spring costs down with it.

12mm is the default answer for shopfronts and commercial entrance doors. It carries the daily abuse of public use, spans standard leaf sizes without noticeable flex, and pairs with widely available floor springs and patch fittings.

15mm earns its place on large or tall leaves where a thinner panel would flex, and on prestige entrances where the deeper, more solid feel of the heavier panel is part of the design.

Weight: The Consequence Buyers Forget

Every step up in thickness adds real weight — glass runs about 2.5kg per square metre per millimetre of thickness, so a 2.1m × 0.9m leaf weighs roughly 47kg at 10mm, 57kg at 12mm and 71kg at 15mm.

That weight lands on the hardware. Floor springs, pivot hinges, clamps and patch fittings all carry load ratings, and a spring sized for 10mm glass will leak and fail early under a 15mm leaf. Our guide on matching hardware covers the closer side of the same logic; for automatic doors, leaf weight also sets the motor spec, which is why our sliding systems carry a 200kg per-leaf rating.

Thicker is not automatically better

Oversizing wastes money twice: once on the glass, again on the heavier hardware it forces. The right thickness is the one matched to the leaf size and duty — not the biggest number on the list.

Getting the Number Right for Your Door

In practice, thickness selection takes minutes once the leaf dimensions and use are known: interior versus entrance, leaf height and width, framed or frameless, manual or automatic. All our panels are tempered to MS 1498 regardless of thickness — our guide on how strong tempered glass is under the MS 1498 standard covers what that certification means — so safety is constant across the range, and the choice is purely structural and economic.

Send us your opening size and intended use on WhatsApp, and we will recommend the thickness and quote glass, hardware and installation together — measured exactly on-site for RM50, fully deductible on your order.

Frequently Asked Questions

What thickness should a main entrance glass door be?

12mm or 15mm. Large, heavy, frequently used main-entrance leaves need the stiffness and durability of the thicker panels, along with floor springs rated to their weight.

Is 10mm glass enough for a shower door?

Usually yes — 8mm to 10mm covers most shower panels and screens. Larger frameless doors within a bathroom often step up to 12mm.

Does glass thickness change the hardware I need?

Directly. Thicker glass is heavier, so floor springs, hinges, clamps and patch fittings must all be rated for the load. Under-specified hardware wears out fast and can be unsafe.

Learn more about Tempered Glass Doors

See how we spec, supply and install tempered glass doors — or send us your questions for a free quotation.