Commercial Door Glass: Laminated vs. Tempered — Security vs. Safety
Too Long; Didn't Read
- Tempered glass is 4x stronger than annealed and breaks into small, blunt cubes. It's a safety product — protects people from sharp shards.
- Laminated glass bonds two panes with a PVB interlayer. When it breaks, it cracks but stays in the frame. It's a security product — prevents entry.
- Both satisfy OBC safety glazing requirements for doors. But only laminated deters smash-and-grab break-ins.
- Cost: Tempered is 10-20% cheaper than laminated for the same size and thickness.
- For storefronts in high-risk areas, laminated is the clear choice. For interior commercial doors, tempered is sufficient.
Answer First: Tempered glass breaks safely into blunt cubes — it protects people from injuries. Laminated glass cracks but stays in the frame — it protects property from break-ins. For storefront doors in commercial areas, laminated is the better choice because it deters smash-and-grab theft. For interior commercial doors where security isn't a concern, tempered is cheaper and meets the same OBC safety requirements.
The Fundamental Difference
These two glass types solve different problems:
Tempered glass is heat-treated to be 4-5x stronger than regular annealed glass. When it does break (from a hard enough impact), it disintegrates into thousands of small, roughly cubic pieces with blunt edges. This is a safety feature — people in the path of breaking glass are far less likely to suffer lacerations.
Laminated glass bonds two panes of glass to a polyvinyl butyral (PVB) interlayer. When it breaks, the glass cracks in a spider-web pattern but the PVB holds the pieces together in the frame. The broken panel stays as a barrier. This is a security feature — an intruder can't simply smash through and walk in.
| Property | Tempered | Laminated |
|---|---|---|
| Strength vs. annealed | 4-5x stronger | 2x stronger (standard laminated) |
| Break pattern | Small blunt cubes, fall out of frame | Spider-web cracks, stays in frame |
| After breaking | Open hole — no barrier | Cracked barrier — still blocks entry |
| OBC safety glazing? | Yes | Yes |
| Security function | None — easy to breach after breaking | Significant — delays entry 30-90+ seconds |
| Sound reduction | STC 28-32 | STC 34-38 (PVB dampens vibration) |
| UV blocking | Minimal | 99% (PVB absorbs UV) |
| Cost (6mm panel) | $15-$25/sq ft | $20-$35/sq ft |
When to Use Tempered
Interior Commercial Doors
Doors between offices, conference rooms, lobbies, and corridors. These doors need safety glass (OBC Section 9.6.1) but don't face break-in risk. Tempered is the cost-effective choice.
Low-Risk Exterior Doors
Back entrances, loading dock personnel doors, doors in secured parking garages. If the door is inside a secured perimeter and not a target for break-ins, tempered meets the code requirement at lower cost.
Sliding Doors
Tempered glass is standard for sliding patio doors and commercial sliding entrances. The glass panels must slide freely in the track — laminated glass is heavier and may strain the roller mechanism on lighter-duty tracks.
When to Use Laminated
Street-Facing Storefronts
Any commercial door visible from the street is a potential smash-and-grab target. Restaurants on Queen Street, retail shops on Bloor, boutiques on Queen West — these locations benefit from laminated glass that stays in the frame after an impact.
Toronto Police data consistently shows that smash-and-grab burglaries are crimes of opportunity — the attacker wants to grab merchandise and leave within 30-60 seconds. Laminated glass that resists breach for 30-90 seconds eliminates the opportunity. The attacker moves on.
Jewelry, Pharmacy, and Electronics Stores
High-value inventory stores in the GTA are priority targets. For these locations, we recommend upgrading beyond standard 6.4mm laminated:
| Laminated Spec | Breach Resistance | Best For |
|---|---|---|
| 6.4mm (3+3 PVB) | 30-60 seconds | General retail |
| 8.8mm (4+4 PVB) | 60-120 seconds | Electronics, fashion |
| 11.5mm (5+5 PVB) | 2-4 minutes | Jewelry, pharmacy |
| Multi-layer (glass + polycarbonate) | 5+ minutes | Banks, dispensaries |
See our security film guide for an alternative to full laminated glass replacement.
Doors Near Pedestrian Traffic
The OBC requires safety glass in all doors, but building managers should consider the specific risk. A door at the bottom of a ramp, near a busy intersection, or in a school hallway benefits from laminated glass because it maintains the barrier after breakage — preventing people from walking through a broken door into traffic or unsafe areas.
Noise-Sensitive Locations
Laminated glass's PVB interlayer dampens vibration across frequencies, achieving STC 34-38 compared to STC 28-32 for tempered. For commercial offices on busy streets, medical clinics, or studios, the sound reduction justifies the premium.
The Installation Difference
From a glazier's perspective, laminated and tempered glass install identically in commercial door frames. The same aluminum or steel frame, the same gaskets, the same setting blocks. The only differences:
- Weight. Laminated glass of the same total thickness is 5-15% heavier. For heavy doors, verify the hinge, closer, and pivot ratings.
- Edge quality. Laminated glass edges expose the PVB interlayer. For visible edges (frameless applications), the edges must be polished or capped.
- Cutting. Neither tempered nor laminated can be cut in the field. Both must be ordered to exact size from the manufacturer. Tempered shatters if scored. Laminated can technically be cut, but the PVB layer makes it impractical.
Cost Comparison for a Standard Storefront Door
| Component | Tempered (6mm) | Laminated (6.4mm) |
|---|---|---|
| Glass panel (24" × 72") | $80-$140 | $120-$200 |
| Labor (remove old, install new) | $100-$200 | $100-$200 |
| Total per door | $180-$340 | $220-$400 |
| Premium for laminated | — | +$40-$60 per door |
For a storefront with 2-4 glass doors, the total upgrade from tempered to laminated is $80-$240 — a modest investment for significantly better security.
The Hybrid: Laminated Tempered
Laminated tempered glass combines both technologies — two tempered panes bonded with PVB. It's the premium option:
- Stronger than standard laminated (tempered panes resist initial impact better)
- Still holds together after breaking (PVB keeps shattered tempered cubes in place)
- Required by the OBC for frameless glass railings where the glass is the sole barrier
Cost: 20-30% more than standard laminated. Used for high-security storefronts, glass guards, and code-mandated applications.
Frequently Asked Questions
Does the Ontario Building Code require laminated glass in commercial doors?
The OBC requires safety glazing (tempered OR laminated) in all doors. Laminated isn't specifically mandated unless the glass is the sole fall barrier. For security, laminated is recommended but not code-required.
How thick should commercial door glass be?
Standard is 6mm tempered or 6.4mm laminated. High-security applications use 9.5mm or 12.7mm laminated. The frame and hardware must support the weight.
Can tempered glass be converted to laminated?
No. The glass must be replaced with a factory-produced laminated unit. We can swap tempered for laminated in most frames without modification.
How long does laminated glass delay a break-in?
Standard 6.4mm: 30-90 seconds. Thicker laminated (9.5mm+) extends to several minutes. This delay eliminates the opportunity for smash-and-grab theft.
Does laminated glass affect door closer operation?
Laminated is 5-15% heavier. Verify the closer's rated capacity. Most commercial closers can handle the difference with minor adjustment.
Upgrading your storefront doors from tempered to laminated? We swap the glass in existing frames — no new door needed. Get a quote with your door dimensions and current glass type.