Retail display cabinet glass and security

At a glance

General descriptions. Where a security class is wanted it must be written from the insurer's letter and a certificate for the assembly, not from this table.

Glass: safety and forced entry are different questions

A retail cabinet has to answer two different questions about its glass. The first is about injury: what happens if a customer or member of staff knocks it. The second is about forced entry: how long it takes someone to get at the goods. They have different answers, and the second is the one most often over-claimed.

• Injury. Laminated glass bonds plies with an interlayer so a cracked pane stays in one sheet; toughened glass breaks into small pieces. The pendulum test in BS EN 12600 classifies how flat glass behaves on impact, but BSI's listing says it sets no application requirements. The fuller comparison of kinds of glass is on glass types for lit joinery and luminaires, and the furniture view of shelves and tops on glass shelves and table tops.
• Forced entry. BS EN 356 tests and classifies security glazing against manual attack. BSI describes the aim as delaying access for a short time, not preventing it. The classification belongs to the glazing as tested. A cabinet that has not been tested as an assembly has no rating, whatever the glass inside it is; a thin frame, a weak lock or exposed hinge screws let the attacker go round the glass.

So write the requirement in two lines: the glass for safety, and, only if the insurer asks for it, a security class backed by a certificate for the assembly. Never write a class number from a brochure; take it from the certificate and the insurer's letter. Security ratings are also given by certification schemes for building products such as LPS 1175: we have not read it, and whether any rating applies to a display cabinet is for the certificate holder to say.

Edges matter for glass that staff handle every day. Name them (see the edge finishes on the glass shelves sheet) and ask for edge protection in transport, because chipped edges are where a pane starts to fail.

Locks, keys and access

A display cabinet is opened many times a day, by staff in a hurry. Lock choice is mostly about how the door moves and who holds the keys, not about a number in a standard.

• Door type decides the lock. Hinged glass doors take a cylinder or cam lock in a stile or a patch fitting; sliding glass doors need a lock that captures both doors; a lift-up or hinged top needs a hook or bolt lock at the front edge. Frameless glass takes a patch lock clamped to the glass, which is a point of stress: the glass supplier drills or notches before toughening.
• Key control. Decide whether cabinets are keyed alike (convenient, one key opens all) or individually (one lost key affects one cabinet), who holds spares, and who may order replacements. A key register belongs in the handover pack (see handover and O&M pack).
• Standards. The cylinder standard BS EN 1303:2015 shows as withdrawn on BSI Knowledge (17 August 2026), and we could not confirm a replacement. Its scope is cylinders for locks normally used in buildings, so it was not written for furniture. BS EN 12209 (building locks, 2024 edition current on its listing) is also a building-hardware document. For a showcase lock the lock maker's own data is what you have, so ask for it and state the edition of any standard it claims.
• Hinges and fixings. Hinge pins and screws that can be reached with the door shut give a way in. Hinge selection is on hinges for joinery.
• Restocking. Give staff a way to refill from the back or from a lower door, so the glazed display door is opened less often and the lock wears less.

Lighting and heat in a closed box

Lighting in a closed glass box heats the box. LED strips run cooler than the old lamps, but the drivers do not, and a closed compartment holds the heat. What the specifier controls: put the driver outside the glass compartment where it can be reached; leave a ventilation route; keep lamps and strips off the glass or away from edges and shelves, because glass tolerates uneven heating worst when annealed (principle in the glass types sheet); and make lamp or strip changes possible without removing shelves. Fabrics, paper, leather and some metals fade or tarnish in light, so name the goods and ask the lighting designer for a lower level or a filtered source where they are sensitive. We give no lux or temperature limit: see lighting built into joinery and LED drivers for decorative luminaires for the driver and access questions.

Counters and accessibility

If the cabinet is part of a sales counter, the access question is separate from the glass. Approved Document M volume 2 (2015 edition incorporating 2024 amendments, England) says at paragraph 3.3 that where a service building has a reception or sales counter, part of it should be at a level suitable for a wheelchair user or a seated person, with any lower section accessible on the reception side. Paragraph 3.6, which deals with reception desks and counters, gives the dimensions we have drawn: a clear manoeuvring space in front of 1200 mm deep by 1800 mm wide if there is a knee recess at least 500 mm deep (1400 by 2200 mm if not); at least one section of counter at least 1500 mm wide with its surface no higher than 760 mm and a knee recess not less than 700 mm above floor level; and a hearing enhancement system such as an induction loop. Paragraph 3.4 adds that glazed screens in front of a reception point can make lip reading harder, which matters for a glass counter front or tall glass display behind a seated assistant.

Two cautions. These are building-regulations figures for buildings; whether a freestanding cabinet or fitted counter in a particular shop must meet them is for building control and the access consultant, and they are a floor, not a design target. And the document is guidance, not a substitute for BS 8300-2, which we have not read. Our general sheet on Approved Document M for furniture and joinery covers the rest.

Standards, their status, and what to ask for

Status is as seen on BSI Knowledge on 8 November 2026 unless stated. None of the standards was read.

What to ask for, in this order:

Door glass: [8.8] mm laminated safety glass to BS EN ISO 12543-2 [edition], [ ] mm plies of [toughened / annealed] glass with [interlayer type] interlayer, polished edges, [low-iron / clear], supplied with the supplier’s declaration and [BS EN 12600 class [ ] where safe breakage is required]. Edges protected in transport. Holes, notches and patch-lock cut-outs as drawing [ref], made before toughening.

Where the client’s insurer requires a security rating, the insurer’s written requirement [ref and date] is to be attached. The cabinet is to be supplied with a certificate for the complete assembly (glass, frame, lock, hinges and fixings) to [standard and edition named by the insurer]. No class is to be stated on drawings or marketing without that certificate.

Lock: [type] to the [hinged / sliding / lift-up] door, [ ] keys per cabinet, [keyed alike / individually keyed], master key [yes / no]. A spare set and a key register are to be delivered in the handover pack. Hinges concealed so that no pin or screw is reachable with the door shut.

Lighting: [LED strip, [ ] mm from glass], driver located [outside the glass compartment, accessible via [panel]], ventilation route as drawing [ref]. The compartment is to be re-lamped without removing shelves. Goods are [light-sensitive: yes / no]: the lighting designer is to advise the level.

Counter: one section at least [1500] mm wide with its surface at [ ] mm (not above 760 mm) and a knee recess at least [500] mm deep with clear height of not less than [700] mm above floor, clear space in front [1200 x 1800] mm, as drawing [ref]. The architect and building control to confirm against the current Approved Document M.

Standards and sources

• BSI Knowledge, status as seen 8 Nov 2026: BS EN 356:2000 current, under review; BS EN 12600:2002 current; BS EN 1303:2015 withdrawn 17 Aug 2026. Listings only.
• Approved Document M volume 2, 2015 edition incorporating 2024 amendments (England): paragraphs 3.3, 3.4 and 3.6.
• BS 8300-2:2018 and BS EN 12209:2024: listings only; not read.

Questions we are asked

Is laminated glass the same as security glass?

No. Laminated glass keeps a cracked pane in one sheet, which helps with injury and with delay. A security class is a test result for a particular assembly under BS EN 356, whose purpose, BSI says, is to delay access for a short time. Ask for the certificate and the class it names.

Should a retail display cabinet be toughened or laminated?

We found no rule that sets a type for a cabinet as such. Laminated is often chosen where the glass should stay in one sheet; toughened where small pieces on breaking are preferred. It is a risk decision with the glass supplier, the safety adviser and the insurer.

Can I specify a lock to a British Standard?

Not easily for furniture. The cylinder standard BS EN 1303:2015 is listed as withdrawn from 17 August 2026 and covers locks normally used in buildings. Ask the lock maker for its own test data and state the edition of any standard it cites.

How high should a sales counter be for wheelchair users?

Approved Document M volume 2 (2015, 2024 amendments, England) paragraph 3.6 gives a section at least 1500 mm wide with the surface no higher than 760 mm and a knee recess not less than 700 mm above the floor. Building control and an access consultant confirm what applies to your shop.

Does the lighting in a display cabinet get hot enough to matter?

It can. A closed box holds the heat of a driver or strip. Keep the driver outside the glass compartment, leave a ventilation route and ask the lighting designer to check goods that fade. We give no temperature or lux figure.