Key Takeaways:
- Laminated glass blocks up to 99% of UV radiation, compared with roughly 25% for toughened glass, protecting displayed merchandise from fading.
- BS EN 356 security ratings range from P1A (basic impact resistance) to P8B (sustained forced-entry protection for banks and jewellers).
- A standard 6.4mm laminated pane reduces noise by 33–34 dB; acoustic laminated configurations reach 41 dB or higher.
- Laminated glass stays in the frame when broken, often eliminating the need for emergency boarding up and reducing after-hours callout costs.
- Supply costs start at around £42–55/m² for 6.4mm PVB laminated, versus £35–45/m² for 6mm toughened — a modest premium for substantially better security and UV performance.
A brick through a standard toughened glass shop front takes less than a second to create a wide-open entry point. The entire panel collapses into granules, and the premises are exposed until someone boards it up — usually at considerable expense if it happens at 2 a.m. on a Sunday. Now picture the same brick hitting laminated glass. It cracks, but the panel holds. The interlayer grips the broken fragments in place, maintaining a physical barrier until a planned replacement can be arranged during working hours.
Security is only one part of the picture. Laminated glass also blocks nearly all UV radiation, cuts noise transmission measurably, and satisfies building regulations that toughened glass alone cannot meet. This guide covers how it is made, what the BS EN 356 security ratings mean in practice, and when it makes sense to specify it for your commercial glazing project.
What Is Laminated Glass and How Is It Made?
The Layer Construction
Two or more sheets of glass are bonded together with a plastic interlayer under heat and pressure in an autoclave. The interlayer holds everything together if the glass is broken or subjected to impact. A typical 6.4mm laminated panel for shop front glazing consists of two 3mm glass sheets bonded with a 0.38mm interlayer. Thicker panels — 10.8mm, 13.5mm, and above — use thicker glass and multiple interlayer plies for greater security and acoustic performance.
Unlike toughened (tempered) glass, which must be cut to size before tempering, laminated glass can be cut after manufacture. This makes it more adaptable for non-standard openings in older commercial buildings.
PVB vs SGP Interlayers — Which Is Better?
Two interlayer types dominate commercial glazing. PVB (Polyvinyl Butyral) is the standard — good safety performance, excellent UV absorption (up to 99%), and adequate noise dampening at a sensible price. SGP (SentryGlas Plus / Ionoplast) is the premium alternative: five times stronger in tear resistance, 100 times more rigid, and twice the load-bearing capacity. SGP also resists moisture at exposed glass edges, where PVB can delaminate over time.
| Property | PVB (Polyvinyl Butyral) | SGP (SentryGlas Plus) |
|---|---|---|
| Tear strength | Baseline | 5x greater |
| Rigidity | Flexible | 100x more rigid |
| Load-bearing capacity | Standard | 2x greater |
| Moisture resistance | Moderate — can delaminate at exposed edges | Excellent — suitable for exposed edges |
| UV blocking | Up to 99% | Up to 99% |
| Cost premium | Baseline | 30–50% more than PVB |
| Best suited for | Standard shop fronts, doors, display windows | Structural glass, frameless balustrades, high-security applications |
For most aluminium-framed shop fronts, where the glass edges are fully captured within the frame, PVB laminated glass performs well and keeps costs reasonable. SGP comes into its own for frameless structural glazing, point-fixed installations, and situations where glass edges remain exposed to the weather.
7 Advantages of Laminated Glass for Commercial Properties
1. Superior Security Against Break-Ins
When toughened glass breaks, the entire panel collapses and an intruder has immediate access. Laminated glass cracks in a spider-web pattern, but the interlayer holds fragments in place. Getting through requires sustained, forceful effort — time that a burglar rarely has.
At P6B rating (the standard anti-bandit specification), laminated glass withstands 31 to 50 hammer-and-axe blows before a 400 x 400mm opening can be created. Jewellers, phone shops, and vape stores should consider P6B minimum. For lower-risk retail, P3A or P4A stops opportunist smash-and-grab attempts.
2. Safety — Stays Intact When Broken
Whether from impact, collision, or thermal stress, a broken laminated panel stays in the frame — no shower of glass across the pavement. Under Approved Document K, laminated glass to BS EN 14449 is one of two accepted safety glass types for critical locations. For overhead glazing and canopies, the regulations go further: the inner pane must be laminated. Toughened glass alone is not permitted.
3. Noise Reduction — Measurably Better Than Toughened
If your premises sit on a busy road or near a railway line, the acoustic performance of your glazing directly affects comfort for customers and staff.
| Glass Configuration | Noise Reduction (Rw) |
|---|---|
| 6mm toughened glass | 29–31 dB |
| 6.4mm laminated (standard PVB) | 33–34 dB |
| 6.8mm acoustic laminated | 37 dB |
| 10.8mm acoustic laminated | 41 dB |
| DGU with laminated inner pane (4/12/6.4mm) | 36–38 dB |
| DGU with acoustic laminated (4/16/6.8mm) | 40+ dB |
Every 10 dB increase represents a perceived halving of noise. The jump from 29 dB (toughened) to 37 dB (acoustic laminated) is not marginal — it is a noticeably quieter interior. For restaurants, salons, and offices on main roads, acoustic laminated glass is one of the most cost-effective upgrades available. Standard double-glazed units can actually perform worse than single glazing at certain frequencies due to resonance; a DGU with an acoustic laminated inner pane avoids this because the interlayer dampens vibration across all frequencies.
4. UV Protection — Blocks 99% of Harmful Rays
UV radiation causes up to 50% of merchandise fading damage. Toughened glass blocks roughly 25% of UV — the same as ordinary float glass, because tempering does not alter UV transmission. Laminated glass blocks up to 99%, regardless of interlayer type. For any shop with south- or west-facing windows displaying stock, that difference protects merchandise, reduces fading on fixtures, and can cut air conditioning costs in summer.
5. Meets UK Building Regulations
Laminated glass to BS EN 14449 satisfies Approved Document K for all critical locations and Approved Document Q, which requires minimum P1A-rated laminated glass adjacent to locks in new-build ground-floor openings. For overhead glazing it is mandatory (inner pane). In an insulated glazing unit with low-E coating, it also helps meet Approved Document L U-value requirements (max 1.2 W/m²K for commercial glazing).
6. Insurance and Cost Benefits
Several commercial insurers offer reduced premiums for premises fitted with laminated glass at P4A or above. The logic is straightforward: fewer successful break-ins mean fewer claims. Over a five-year period, the reduced premium can offset a meaningful portion of the additional glass cost — before you factor in the avoided cost of a break-in, stock loss, and business interruption.
7. No Emergency Boarding Up Required
When toughened glass breaks, the panel collapses and your premises are immediately exposed. Emergency boarding up at 2 a.m. costs £200–£500 before the glazing replacement itself. Laminated glass cracks but stays in the frame. The broken panel can remain in situ until a planned replacement during working hours — no emergency callout, no boarding up, no weekend premium rates. For anyone who has dealt with the hassle of securing damaged commercial property, this practical benefit is hard to overstate.
Laminated Glass Security Ratings: BS EN 356 Explained
BS EN 356 classifies glass resistance to manual attack in two categories: ball-drop tests (P1A–P5A) simulating thrown objects, and axe/hammer tests (P6B–P8B) simulating sustained break-in attempts.
| Rating | Test Method | Impact / Blows | Typical Application |
|---|---|---|---|
| P1A | 4.11 kg steel ball × 3 drops | 1,500 mm drop height (62 J) | Basic safety, roof glazing |
| P2A | 4.11 kg steel ball × 3 drops | 3,000 mm drop height (123 J) | Low-risk commercial |
| P3A | 4.11 kg steel ball × 3 drops | 6,000 mm drop height (247 J) | Standard commercial premises |
| P4A | 4.11 kg steel ball × 3 drops | 9,000 mm drop height (370 J) | Enhanced commercial security |
| P5A | 4.11 kg steel ball × 9 drops (3 × 3) | 9,000 mm drop height (370 J each) | High-value retail |
| P6B | Hammer and axe attack | 31–50 blows to create 400 × 400 mm opening | Anti-bandit — jewellers, phone shops |
| P7B | Hammer and axe attack | 51–70 blows | High-security commercial |
| P8B | Hammer and axe attack | 71+ blows | Maximum security — banks, bullion stores |
The P5A-to-P6B Threshold
P5A resists thrown objects — bricks, bottles, rocks. P6B resists a sustained, deliberate break-in using tools. That is a fundamentally different threat level, and it is the most important threshold in the table. For high-value retail premises — jewellers, electronics, designer goods — P6B should be the minimum. Many commercial insurance policies for high-risk stock specifically require it.
Which Rating Does Your Shop Front Need?
Standard high-street retail (clothing, homeware): P3A or P4A. Higher-risk areas: P5A. Display stock worth £10,000+: P6B minimum.
Laminated Glass vs Toughened Glass — How They Compare
| Factor | Laminated Glass | Toughened Glass |
|---|---|---|
| Supply cost per m² | £42–120 | £28–80 |
| Break behaviour | Cracks in spider-web pattern; stays in frame | Shatters into small granules; panel collapses |
| Security level | High — resists penetration | Low-medium — panel collapses on impact |
| UV protection | Up to 99% | Approximately 25% |
| Noise reduction | 33–42+ dB | 29–31 dB |
| Post-breakage barrier | Maintained — no boarding up needed | None — emergency boarding up required |
| Overhead glazing compliant | Yes (mandatory for inner pane) | Outer pane only |
| Can be cut after manufacture | Yes, by a specialist | No — must be cut before tempering |
| Weight | Heavier | Lighter |
| Optical clarity | Very good (slight interlayer haze possible) | Excellent |
| Insurance benefit | Potential premium reduction at P4A+ | Standard |
Toughened glass is not a poor choice for every application. For internal partitions, frameless doors, and weight-sensitive installations, it remains a strong option — see our toughened glass shop fronts page for more detail.
Combining Both: Toughened Laminated Glass
For maximum performance, toughened laminated glass bonds heat-strengthened or fully toughened panes with a PVB or SGP interlayer — giving you impact strength and fragment retention in one panel. At 13.5mm it starts from around £95–130/m² (supply) and is the standard for high-security applications.
How Much Does Laminated Glass Cost?
Supply costs depend on thickness, interlayer type, and any additional treatments. Current UK indicative prices (glass supply only):
| Glass Type | Thickness | Approx. Cost/m² (Supply) |
|---|---|---|
| Standard PVB laminated | 6.4 mm | £42–55 |
| Standard PVB laminated | 10.8 mm | £70–90 |
| Standard PVB laminated | 13.5 mm | £85–110 |
| Toughened laminated | 13.5 mm | £95–130 |
| Toughened laminated | 17.5 mm | £120–160 |
| Acoustic laminated | 6.8 mm | £90–120 |
| Acoustic laminated | 10.8 mm | £120–160 |
For comparison, 6mm clear toughened glass runs £35–45/m². The laminated premium is typically 20–40% for equivalent sizes. Fully installed shop front costs (glass, frames, and fitting) range from £300–700/m² for standard installations, up to £1,000+/m² for high-security glazing.
Commercial Applications — Where We Install Laminated Glass
Retail Shop Fronts
The core application. Laminated glass protects displayed stock from both theft and UV fading while keeping noise out. For ground-floor retail on busy streets, a 6.4mm or 10.8mm laminated panel in an aluminium frame system is the most common specification we fit.
Restaurants, Takeaways, and Late-Night Businesses
Premises that trade late are more exposed to opportunist vandalism. Laminated glass provides security that persists after impact and noise reduction that improves the interior for diners and staff.
Overhead Glazing and Canopies
UK Building Regulations require laminated glass for the inner pane of any overhead glazing. We install shop front canopies with laminated inner panes as standard. There is no compliant alternative.
High-Security Premises
Jewellers, electronics retailers, and any business holding high-value stock should specify P6B-rated laminated or toughened laminated glass as a minimum. The cost premium is typically a fraction of the excess on a single insurance claim.
When to Specify Laminated Glass Over Toughened
Not every installation needs laminated glass, and we would not recommend it where it is not warranted. Here is a practical guide:
Specify laminated glass when:
- Ground-floor retail with stock on display — security and UV protection
- High-value goods (jewellers, phone shops, vape stores) — P6B+ anti-bandit rating
- Premises on a busy road — acoustic laminated for noise reduction
- South-facing or west-facing windows — 99% UV blocking to protect merchandise
- Overhead glazing and canopies — mandatory under Building Regulations
- Late-night and takeaway businesses — security against opportunist attacks
- Conservation areas where replacing an existing shop front with timber frames — laminated glass in an insulated unit adds security and thermal performance
Toughened glass may be the better choice when:
- Internal display partitions where security is not a concern
- Frameless glass doors prioritising clean aesthetics and low weight
- Budget-constrained projects where break-in risk is genuinely low
Many of the older commercial properties we work on across London still have single-glazed toughened panels with minimal security and no UV or acoustic benefit. Upgrading to laminated glass within a modern double-glazed unit is one of the most cost-effective improvements a property owner can make.
Frequently Asked Questions
What are the main advantages of laminated glass?
Laminated glass provides superior security (stays intact when broken), blocks up to 99% of UV radiation, reduces noise transmission by 4–12 dB more than toughened glass, meets all UK safety glazing requirements under BS EN 14449, and eliminates the need for emergency boarding up after breakage.
Is laminated glass better than toughened glass?
For security, UV protection, and noise reduction, laminated outperforms toughened in every measurable category. Toughened glass is lighter, optically clearer, and less expensive — better for internal partitions and frameless doors. For external commercial glazing, laminated is the stronger all-round specification.
What is the disadvantage of laminated glass?
Cost is the main drawback — 20–40% more than toughened for equivalent sizes. It is also heavier, which can affect frame and hardware specifications. A very slight interlayer haze is possible but negligible in modern production.
Is laminated glass burglar proof?
No glass is truly burglar proof, but P6B-rated laminated glass withstands 31–50 hammer-and-axe blows, and P8B withstands 71+. In practice, this exceeds the time most burglars will invest once an alarm has triggered.
Does laminated glass reduce noise?
Yes. Standard 6.4mm laminated achieves 33–34 dB noise reduction versus 29–31 dB for toughened. Acoustic laminated reaches 37–41+ dB depending on thickness. A DGU with acoustic laminated inner pane can exceed 40 dB.
How much UV does laminated glass block?
Up to 99%, regardless of interlayer type. Toughened and standard float glass block only about 25%. This makes laminated glass effective at protecting displayed merchandise, flooring, and furnishings from fading.
Is laminated glass a legal requirement in the UK?
It is mandatory for the inner pane of overhead glazing (Approved Document K) and adjacent to locks in new-build ground-floor openings (Approved Document Q, minimum P1A to BS EN 356). Elsewhere, either laminated or toughened satisfies safety glazing requirements.
How much more expensive is laminated glass than toughened?
Typically 20–40% more at supply level. A 6.4mm laminated panel runs £42–55/m² versus £35–45/m² for 6mm toughened. The gap widens with thicker or security-rated configurations.
Upgrade Your Shop Front Glass with Huxley & Co
With over 20 years fitting commercial glazing across London and the South East, we help business owners choose the right glass specification — not the most expensive option, but the one that matches the actual risk, regulations, and budget. FENSA registered, CHAS accredited, and Constructionline approved.
Whether you need a single laminated panel replacing or a full commercial shop front installation, we will survey your premises, recommend the right specification, and provide a fixed-price quotation.
Call us on 020 7112 4849 or request a free survey online to discuss your project.