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Safety & security glass — Building Regs Approved Document N, where the law requires safety glazing
Any pane within 800mm of the floor in a window — or 1500mm of the floor in or beside a door — must be safety glass. That's not a recommendation: it's Approved Document N of the Building Regulations, backed up by BS 6262-4. Pane Relief supplies the full safety-and-security range — toughened to BS EN 12150 (Class 1(C)1 impact), laminated to BS EN 14449 (the glass that breaks but holds), and anti-bandit grades to BS EN 356 P1A through P5A. Every unit ships with a Declaration of Performance on request. If you're a homeowner replacing a critical-location pane or a trade installer signing-off to Building Control, you're in the right place.
Replacing a critical-location pane
If the failed pane is in a door, beside a door, in a low window, on a stairwell, in a bathroom, or anywhere a child or adult could fall against it — you legally need safety glass. We'll spec it correctly first time and ship UKCA-marked units with the kitemark stamp visible in the corner. Free UK mainland delivery, 10-year edge-seal warranty.
Configure safety glassSign-off-grade compliance documentation
Every unit ships with the kitemark visibly stamped, the BS EN reference clearly traceable, and a Declaration of Performance on request. Net 30 trade accounts, tiered volume discount on 5+/20+/50+, scheduled site delivery, and Building Control sign-off bundles for FENSA installers and developers. Spec sheets stay on file for ten years.
Trade pricing & compliance docsWhich safety grade do you need?
Pick the closest scenario. Every tile links to the relevant product range or sub-collection.
Toughened — critical locations
BS EN 12150 Class 1(C)1. Default safety glass for doors, sidelights, low windows. Five-times stronger than annealed, breaks into harmless granules.
Laminated — overhead & retention
BS EN 14449 with PVB interlayer. Glass breaks but the PVB film holds shards in place. Mandatory overhead and the upgrade for security applications.
Anti-bandit — security upgrade
BS EN 356 P1A to P5A rated. Multi-layer PVB or polycarbonate interlayer. For ground-floor windows, side accesses, jewellery cabinets, vulnerable properties.
Toughened-laminated combo
The belt-and-braces spec: outer pane toughened, inner pane laminated. Common in commercial, schools, balustrades, and high-spec residential.
Safety + acoustic
Laminated PVB doubles as an acoustic interlayer. Rw 35-44 dB while ticking the safety box — main road, schools, hotels.
Bespoke spec
Mixed safety/acoustic/low-E, shaped panes, oversized panels. Build the exact spec and get a live price.
Critical-locations decision tree — do I need safety glass?
Approved Document N is short and unambiguous. Run your pane through the four checks below — if any answer is "yes", you need toughened or laminated safety glass.
The 4 critical-location checks
- In a door, or in a sidelight within 300mm of a door edge? Safety glass required up to 1500mm from floor.
- In any window, with the lowest edge below 800mm from the floor? Safety glass required.
- In a roof, conservatory roof, or any overhead position? Laminated specifically required (toughened alone is not sufficient overhead — falling shards are a hazard).
- In a wet area (bathroom, shower, swimming pool surround) or stairwell? Safety glass required — toughened acceptable, laminated preferred in stairwells.
Toughened vs laminated — which to choose?
Toughened is the default for doors, sidelights, and low windows: cheaper, lighter, hits Class 1(C)1, breaks into harmless granules. It can't be drilled or cut after manufacture.
Laminated is mandatory overhead, recommended for security applications, and required where the broken glass must remain in place (balustrades, schools, glazed balconies). It's also a near-perfect acoustic interlayer — see acoustic glass if noise is also in play.
Safety glass — common questions answered
Q: Building Control wants kitemark evidence. What do you supply?
Every toughened unit ships with the BS EN 12150 kitemark permanently stamped or laser-etched in the corner (typically the bottom-right of the inner pane). Laminated units carry the BS EN 14449 mark. On request — at no extra charge — we issue a Declaration of Performance (DoP) referencing the batch, the standard, the UKCA mark, and the manufacturer ID. Building Control inspectors accept this as sign-off evidence. Quote your order number to trade@panerelief.co.uk and the PDF DoP comes back the same day.
Q: My pane is at 900mm above the floor — am I exempt?
If it's a window (not a door, not a sidelight), yes — Approved Document N applies to glazing where the lowest edge of the pane is below 800mm from the floor. 900mm is above the threshold. But: if it's a sidelight beside a door (and within 300mm of the door edge), the 1500mm rule kicks in instead and you'd still need safety glass. When in doubt, send a photo with a tape measure in shot to the helpline and we'll confirm.
Q: Can toughened glass be cut, drilled, or sanded after manufacture?
No. Toughening is the final manufacturing step — any subsequent cutting, drilling, edge-grinding, or even deep scratching will cause the entire pane to shatter into granules. All cut-outs, holes, edge polishing, and shaped profiles must be specified before the pane goes through the toughening furnace. If you need bespoke shapes or holes, send a CAD or paper template at order time. Lead time for shaped toughened units is 10-14 working days.
Q: What's the security upgrade path beyond standard safety glass?
BS EN 356 grades it. P1A-P5A covers ball-drop impact resistance (vandalism, casual break-in attempts) — typically 1-3 PVB interlayers. P6B-P8B covers axe-attack resistance (sustained forced entry, around 30-50 strikes). P7C-P8C covers ballistic resistance (firearms). For most residential applications we recommend P2A or P4A laminated as the realistic security upgrade — cost-effective, deters opportunistic break-ins, doesn't add unmanageable weight. Anything above P5A starts to get specialist (and heavy — P8B is around 50mm thick).
Q: Does laminated glass count as fire-resistant?
Standard laminated (PVB interlayer) is not fire-rated — the PVB melts and the glass fails within minutes of flame contact. For fire-resistant glazing you need a specifically engineered intumescent or wired-glass unit (E30, EI30, EI60 rated to BS EN 13501-2). Those are a separate, specialist product line — call the helpline if a fire-resistance spec has been called up by your building inspector or fire engineer and we'll route you to the right supplier or specify a fire-rated unit through our trade desk.
Q: How much heavier is safety glass than standard annealed?
Toughened weighs exactly the same as annealed of the equivalent thickness — the difference is heat treatment, not mass. Laminated is heavier because of the PVB interlayer: a 6.4mm laminated pane (3-0.4-3) weighs about 16 kg/m² vs 15 kg/m² for 6mm annealed. The real weight jump comes with thicker laminated security grades — 11.5mm laminated (5-1.5-5) is around 28 kg/m², which matters for hinges, lifting, and frame load. We flag the weight on every product page and the configurator.
Q: Heat-soak testing — what is it and when do I need it?
Toughened glass has a small, well-known failure mode: nickel-sulphide inclusions can cause spontaneous breakage years after installation. Heat-soak testing (per BS EN 14179) bakes the toughened pane at 290°C for two hours, forcing any unstable inclusions to fail in the factory rather than in your window. It's mandatory for overhead and balustrade applications, recommended for any frameless or critical-safety position, and adds around 15-20% to the unit cost. Specify "heat-soaked" at order, or it ships standard non-heat-soaked toughened.
Q: What's the lead time and warranty on safety glass?
Stock-size toughened or laminated sealed units: 7-10 working days. Custom rectangular non-stock: 10-12 working days. Shaped, oversized, or heat-soaked: 14-18 working days. Anti-bandit P5A and above: 18-21 working days. Every unit carries a 10-year edge-seal warranty (BS EN 1279-2 compliant), a lifetime no-spontaneous-breakage warranty on heat-soaked toughened, and a 5-year warranty on the PVB lamination. Emergency same-day boarding for broken safety glass — call the helpline.
Q: Toughened-laminated combo — when does it make sense?
Belt-and-braces. The outer pane is toughened (impact resistance + breaks safely if struck from outside); the inner pane is laminated (holds in place if compromised, plus acoustic benefit). Standard spec on glazed school entrances, hospital atria, glass balustrades over occupied space, and high-spec residential where the client wants the maximum safety envelope. Around 30-40% more expensive than single-spec toughened — and around 5kg/m² heavier than a comparable standard unit.
Related guides and specifications
Building Control sign-off bundle on every order
Kitemark stamped, Declaration of Performance issued on request, UKCA-marked, BS EN traceable. Call 0117 330 3057 (08:00-18:00 Mon-Fri) for spec advice — or send your drawings for a sanity-check quote.