Both count as safety glass. Tempered glass is heat treated so it breaks into small blunt pieces that fall clear, which is why shower doors, railings and partitions use it. Laminated glass bonds two panes to a plastic interlayer, so a break stays stuck together in the opening. Different failure behavior, different job. Shower work at Accurate Glass & Mirror is tempered.
Tempered glass is heated and cooled rapidly so the surface sits in compression while the core stays in tension. That makes it far stronger than ordinary glass of the same thickness, and when something finally defeats it the entire panel relieves at once into a pile of small pieces with dull edges. Laminated glass is two lites bonded to a clear interlayer. Strike it and the glass cracks, but the interlayer holds the fragments where they are, so the opening stays covered and nothing lands on the floor.
Neither one is unbreakable, and that is worth stating plainly. Tempered shrugs off impact across its face and stays vulnerable at edges and corners, which is where a chip quietly becomes a failure months later. Laminated is easier to crack and much harder to get through, which is why it goes where somebody might try. The two are engineered around different risks rather than around different strength ratings.
Shower doors, tub enclosures, glass railings, office partitions and glass tabletops are tempered. Anything in a wet area, in a walking path or within reach of a swinging door counts as a glazing hazard location and needs safety glass, and tempered is the standard answer there. Laminated appears where a falling panel would be dangerous or where the opening has to stay closed after a break: overhead glazing, some exterior work, storefronts with a security concern, and rooms where the sound reduction of the interlayer is worth paying for. Some assemblies use both together.
Mirrors sit outside both categories, which surprises people. A standard mirror is annealed glass with a reflective backing, so a gym wall or a full length mirror gets its safety from a backing film and from how it is mounted rather than from tempering. When a mirror lands somewhere that requires safety glazing, that gets specified at order time, because it changes the product being made.
Tempered glass will not accept a cut, a drilled hole or a notch once it has been made. Every hinge hole, every handle notch and the finished size are all set before the panel goes through the oven, which is why a custom opening gets measured first and the glass ordered to those numbers. A broken tempered panel is replaced, never repaired. Laminated often stays in place until its replacement arrives, because it keeps its shape.
Tempered panels sometimes fail with no impact at the moment of breakage, usually from an edge chip that has been quietly spreading or from stress at a hardware point. Damage along an edge or a corner is the first place to look. It is uncommon, and it is one more reason edges get properly finished and hardware gets set to correct clearances instead of torqued down tight.
It depends on the location and the system. New Jersey follows the model building codes, guards have to meet height and load requirements, and safety glazing is required, but some configurations call for laminated while others accept fully tempered panels in an engineered system. Your local building department is the authority, and that answer belongs in hand before fabrication starts.
Tempered glass is made to size, so a replacement begins with the opening and the hardware pattern rather than a sheet off the rack. On the commercial side we board up first and fabricate the real panel after. Call (201) 460-1313 when a panel goes down.
