A storefront glass system is one of the most visible elements of any commercial property, and security is one of the first questions that comes up when business owners start planning an installation or upgrade. At Fleetwood Glass, we think about storefront security as a whole-system question, not just a matter of how thick the glass is. The answer lives in how every component works together: the glass itself, the framing, the hardware, and the quality of the installation.
It Starts With the Glass Composition
Glass type is the foundation, but not all “security glass” functions the same way.
- Tempered glass is roughly four to five times stronger than standard annealed glass and fractures into small, relatively harmless pieces on impact. It handles force well, but it doesn’t hold together after breaking, which means it doesn’t actually prevent entry.
- Laminated glass bonds two or more glass layers with a polyvinyl butyral (PVB) or resin interlayer. When it breaks, the fragments stay bonded to the interlayer, maintaining a barrier even after impact.
- Laminated tempered glass combines both properties: the strength of tempered glass with the penetration resistance of laminated construction.
For storefronts where smash-and-grab risk is a concern, the interlayer thickness matters. A 0.090″ interlayer offers significantly more resistance than a standard 0.030″ interlayer. Specifying the right glass for the actual threat level is where good system design starts.
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The Framing System Does More Work Than Most People Realize
This is where a lot of storefront security discussions fall short. Robust glass installed in a weak frame is still a weak system.
Commercial framing has a few qualities worth understanding when you’re comparing options or reviewing a quote. Wall thickness on aluminum extrusions is one of the first things to look at: commercial-grade profiles resist prying far better than residential-grade framing, and that distinction rarely shows up in a surface-level comparison. Glazing method matters too. Structural silicone glazing and captured glazing systems secure the glass into the frame itself, making it much harder to push or pry a panel free from the outside. And framing with minimal gaps reduces the leverage points that make forced entry easier. Every gap in a frame perimeter is a potential weak point.
Anchoring to the Building Structure
How the storefront attaches to the building carries equal weight. The sill, header, and jamb connections bear the load when force is applied, whether from wind, impact, or a break-in attempt. Inadequate anchoring is one of the most common vulnerabilities in existing storefront installations, and it’s rarely visible without a closer look.
Hardware Is Usually the Weakest Link
Well-specified glass and framing can be undermined by hardware that isn’t up to the same standard. A few areas deserve particular attention.
Multi-point locking systems engage at the top, bottom, and at least one mid-point along the door, distributing resistance across the frame rather than concentrating it at a single latch. Mortise locks and commercial-grade deadbolts offer substantially more resistance to forced entry than standard cylindrical locksets. Hinges and pivots should be tamper-resistant, either concealed or pinned, so removing the door from the outside isn’t a viable workaround.
Fixed panels adjacent to doors need equal attention. If the door hardware is solid but the adjacent fixed lite is easy to compromise, the overall system is only as strong as that panel.
Automatic door operators introduce additional considerations. When the system is locked, the operator needs to be properly secured so it can’t be used to bypass the locking mechanism.
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Installation Quality Determines Long-Term Performance
Even the best-specified system underperforms when installation is rushed or inconsistent.
Glass bite is one of the details that gets overlooked. Adequate engagement of the glass edge within the frame, typically a minimum of one inch in commercial applications, ensures the panel is properly supported under load. Setting blocks and edge clearance prevent stress points that lead to thermal cracks over time, compromising both the glass and the seal. Weathersealing integrity matters beyond moisture control: over time, water infiltration can compromise laminated interlayers, reducing the glass’s penetration resistance from the inside out.
Security isn’t only what a system can withstand on day one. It’s what it can withstand after years of thermal cycling, weather exposure, and regular use. That’s an installation and maintenance question as much as a specification question.
The Whole System Has to Work Together
Storefront security comes from glass composition, framing quality, hardware selection, and installation workmanship functioning as a single system. Upgrading one element without addressing the others leaves gaps that are straightforward to exploit.
At Fleetwood Glass, we approach every project with that whole-system perspective. If you’re evaluating a storefront installation or have questions about an existing system, we’re glad to talk through what you’re working with. Reach us at 604-376-8661.