{"product_id":"composite-door-glass-insert-toughened-laminated","title":"Composite Door Glass Insert (Toughened + Laminated)","description":"\n\u003cp class=\"pr-flagship__lede\"\u003e\u003cstrong\u003eThe replacement insert for composite front doors\u003c\/strong\u003e. A 24mm sealed unit combining a toughened outer pane (BS EN 12150) with a laminated inner pane (BS EN 14449), argon-filled cavity, sized for the small-format glass inserts typical of UK composite front doors — 285 to 600mm wide, 850 to 1200mm tall. Toughened-plus-laminated is the spec composite-door manufacturers default to, because it combines critical-location impact safety with light intruder resistance in one stack.\u003c\/p\u003e\n\n\u003cp\u003eComposite front doors are the dominant UK front-door type post-2010: a high-density polyurethane core sandwiched between GRP (glass-reinforced polymer) skins, with cut-outs for glazed inserts and letter-plates. When the glass insert fails — typically misting or seal blow after 8-15 years — the door itself is usually fine, only the unit needs replacement. This flagship handles the standard composite-door insert sizes used by the major UK door brands.\u003c\/p\u003e\n\n\u003ch2\u003eWhy toughened outer + laminated inner\u003c\/h2\u003e\n\u003cp\u003eThe composite-door insert sits at adult-shoulder-to-knee height in a high-traffic family entrance. Approved Document N classifies it as a critical location: glazing within 300mm of a door edge, below 1500mm, must meet Class 1(C)1 (toughened) or Class 2(B)2 (laminated equivalent). The toughened outer satisfies this on the outside face.\u003c\/p\u003e\n\n\u003cp\u003eThe laminated inner adds two things: (a) light intruder resistance — the PVB interlayer prevents a clean break-through after the outer toughened layer is shattered, slowing forced entry meaningfully; (b) fragment retention on the inside face — if a child or pet impacts the door from the inside, the toughened-shattering shower is contained by the laminated layer. Both together is the standard spec for \"secure by design\" residential entrance glazing.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specification\u003c\/h2\u003e\n\u003ctable class=\"pr-spec-table\"\u003e\n  \u003ctr\u003e\n\u003cth\u003eOverall thickness\u003c\/th\u003e\n\u003ctd\u003e~24mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBuild-up\u003c\/th\u003e\n\u003ctd\u003e4mm toughened outer \/ 16mm argon cavity \/ 6.4mm laminated inner (3+3 with 0.38mm PVB)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eOuter-pane standard\u003c\/th\u003e\n\u003ctd\u003eBS EN 12150 + BS EN 12600 Class 1(C)1 (toughened impact)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eInner-pane standard\u003c\/th\u003e\n\u003ctd\u003eBS EN 14449 + BS EN 12600 Class 2(B)2 (laminated impact + fragment retention)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBreak behaviour\u003c\/th\u003e\n\u003ctd\u003eOuter shatters granular on impact; inner cracks but PVB holds fragments\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eIntruder resistance\u003c\/th\u003e\n\u003ctd\u003eLight — meaningful slowdown vs DG-toughened-only, but not BS EN 356 P-rated\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eGas fill\u003c\/th\u003e\n\u003ctd\u003e90% argon (BS EN 1279-3)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eU-value (centre-pane, uncoated)\u003c\/th\u003e\n\u003ctd\u003e1.3 W\/m²K\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eU-value (with hard-coat low-E configured)\u003c\/th\u003e\n\u003ctd\u003e1.1 W\/m²K — configurable upgrade\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eg-value\u003c\/th\u003e\n\u003ctd\u003e0.62\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLight transmittance\u003c\/th\u003e\n\u003ctd\u003e~76% (laminated inner lower than clear)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eUV blocking via PVB\u003c\/th\u003e\n\u003ctd\u003e~99% UV-A and UV-B — reduces hall-runner and carpet fade\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eStandards\u003c\/th\u003e\n\u003ctd\u003eBS EN 1279, BS EN 12150, BS EN 14449, BS EN 12600, Approved Document N, Approved Document Q (security in dwellings — relevant for new build)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWhere this unit is the right call\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eReplacement of failed (misted, blown, condensated) glass inserts in UK composite front doors\u003c\/strong\u003e — the standard application. Original door is usually fine; only the unit needs replacing.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSolidor, GRP-Tech, Hurst, Endurance, Distinction Doors\u003c\/strong\u003e and other major UK composite-door brand inserts — most accept 24mm units in the cut-out. Check brand-specific bead sizes before ordering.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eApproved Document Q compliance for new-build entrance doors\u003c\/strong\u003e — Part Q requires \"secure by design\" front-entrance glazing on new dwellings. Toughened-plus-laminated is the standard compliant build.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHigher-risk security postcodes\u003c\/strong\u003e — areas with elevated burglary rates where the homeowner wants more than standard toughened. (For high-risk applications, consider upgrading to BS EN 356 P-rated anti-bandit via configurator.)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePeriod-property front doors\u003c\/strong\u003e retrofitted with composite-door cores but retaining a glazed sidelight or insert with heritage muntin overlay — internal Georgian bars are configurable.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eFor French door replacement units (single-leaf 600-900mm wide), the \u003ca href=\"\/products\/french-door-glass-sealed-unit-symmetric-pane\"\u003e\u003cstrong\u003eFrench Door Glass Sealed Unit (Symmetric Pane) flagship\u003c\/strong\u003e\u003c\/a\u003e is the right spec. For full-height patio \/ bi-fold door glazing, the \u003ca href=\"\/products\/patio-bi-fold-door-triple-glazed-unit\"\u003e\u003cstrong\u003ePatio \/ Bi-Fold Door Glass Unit (Triple Glazed) flagship\u003c\/strong\u003e\u003c\/a\u003e handles that aperture range. The full safety-glazing decision tree is on the \u003ca href=\"\/pages\/safety-security-glass\"\u003e\u003cstrong\u003esafety \u0026amp; security glass topical page\u003c\/strong\u003e\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch2\u003eStock sizes — composite-door-insert-specific\u003c\/h2\u003e\n\u003cp\u003eFour standard composite-door insert stock sizes are listed below — covering the most common cut-out sizes used across the major UK composite-door brands:\u003c\/p\u003e\n\n\u003cul\u003e\n  \u003cli\u003e285 × 850 mm — narrow letterbox-pane insert (Solidor \"Italia\" range, similar narrow patterns)\u003c\/li\u003e\n  \u003cli\u003e285 × 1200 mm — tall slim insert pattern (Solidor \"Conway\", Hurst \"London\")\u003c\/li\u003e\n  \u003cli\u003e400 × 1000 mm — typical mid-size insert (Endurance, Distinction Doors common patterns)\u003c\/li\u003e\n  \u003cli\u003e600 × 1200 mm — full-width insert (modern minimal \"single-glazed-look\" composite doors)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eDispatch 10-14 working days from order (toughening + lamination + sealed-unit assembly is a sequential multi-stage process). Custom sizes — including circular and elliptical inserts (popular in cottage-style composite doors), shaped Gothic-top inserts, and brand-specific bespoke replicas — are priced via the \u003ca href=\"\/pages\/configure\"\u003e\u003cstrong\u003eonline glass configurator\u003c\/strong\u003e\u003c\/a\u003e. Send a photo of the door brand badge or product label at order — many composite-door brands have their own glass-pattern signature that we can replicate (frosting, sandblast pattern, internal bar layout).\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003ePattern and decoration:\u003c\/strong\u003e most composite-door inserts in service feature a decorative pattern — frosted geometric, sandblasted floral, bevelled clear, or stained-leadlight overlay. We supply with standard clear by default; configure the configurator with pattern options or upload a reference photo for bespoke matching. Pattern matching adds 5-7 working days.\u003c\/p\u003e\n\n\u003ch2\u003eCertification and standards\u003c\/h2\u003e\n\u003cp\u003eEvery unit ships with: UKCA mark, BS EN 1279 Declaration of Performance, BS EN 12150 toughening stamp etched on the outer pane, BS EN 14449 laminated-glass certificate on the inner pane (PVB batch identity included), BS EN 12600 impact classification, and an Approved Document Q compliance statement on request (relevant for new-build sign-off). For commercial \/ multi-residential projects, we supply a Letter of Conformance referencing the standards bundle.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eWhich composite-door brands are these compatible with?\u003c\/h3\u003e\n\u003cp\u003eThe 4 stock sizes cover ~80% of UK composite doors from Solidor, Endurance, Hurst, Distinction Doors, GRP-Tech, Rockdoor, and Comp Door. Bead-size tolerance is typically ±2mm — most brands accept the standard 24mm overall thickness. The remaining ~20% are bespoke \/ boutique brands with proprietary insert sizes; for those, custom-size configuration is the right path. Send a brand identifier + photo when ordering custom.\u003c\/p\u003e\n\n\u003ch3\u003eWill it fit my existing composite-door cut-out?\u003c\/h3\u003e\n\u003cp\u003eMeasure the existing unit (gentle measurement at the rebate after carefully removing the inner bead if accessible). The replacement should match the existing unit's overall dimensions within 2-3mm — the cut-out is sized for the unit, not the unit for the cut-out. Send dimensions + a door brand identifier to \u003ca href=\"\/pages\/contact-us\"\u003eour contact form\u003c\/a\u003e for fit confirmation before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eHow secure is this vs standard toughened DG?\u003c\/h3\u003e\n\u003cp\u003eMeaningfully more secure. A burglar attacking standard toughened double glazing with a brick or hammer typically gets through in 5-10 seconds (the granular shower clears the aperture quickly). The laminated inner pane on this unit holds glass fragments in place after the toughened outer breaks — typically extending the forced-entry time to 60-120 seconds, long enough for alarms to deter opportunistic intruders. For high-risk applications, specify BS EN 356 P-rated anti-bandit via the configurator.\u003c\/p\u003e\n\n\u003ch3\u003eUV blocking — actually meaningful?\u003c\/h3\u003e\n\u003cp\u003eYes for hall furnishings near a sun-facing front door. PVB blocks ~99% of UV-A and UV-B (vs ~30% UV-A for monolithic glass). Halls with east-facing or south-facing front doors see hall-runner fade, console-table colour-shift, and printed-artwork degradation reduced markedly with laminated glazing on the door insert. The UV benefit is essentially a side-effect of the safety\/security spec but worth knowing.\u003c\/p\u003e\n\n\u003ch3\u003eCan I get a frosted or bevelled pattern?\u003c\/h3\u003e\n\u003cp\u003eYes — frosted, sandblasted, satin-acid-etch, and bevelled-clear patterns are configurable. Bevelled clear is the most popular for modern minimalist composite doors; sandblasted floral and Georgian-bar overlays are common in cottage and traditional ranges. Configure via the \u003ca href=\"\/pages\/configure\"\u003econfigurator\u003c\/a\u003e with brand and pattern photo for bespoke matching.\u003c\/p\u003e\n\n\u003ch3\u003eLead time for stock sizes?\u003c\/h3\u003e\n\u003cp\u003e10-14 working days. Toughening adds 3 days, lamination adds 3-5 days, sealed-unit assembly adds 2-3 days — these are sequential processing steps, not parallel. Heat-soak testing (BS EN 14179) on the toughened outer adds another 3 days; recommended for high-risk applications where spontaneous breakage of a previously-replaced toughened unit nearby has been observed.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty?\u003c\/h3\u003e\n\u003cp\u003e10 years on edge-seal integrity (BS EN 1279-2). 10 years on argon retention to ≥80% of initial fill. 10 years on PVB delamination (BS EN 14449 manufacturer standard). Toughened pane integrity is manufacturer-lifetime warranty against in-stock defect; spontaneous NiS-inclusion breakage is excluded unless heat-soak-tested. Transit damage is covered for 14 days from delivery — inspect on receipt before installer signs off.\u003c\/p\u003e\n","brand":"Pane Relief","offers":[{"title":"285 × 850 mm","offer_id":61853954015562,"sku":"DG-CMPDR-285x850","price":45.0,"currency_code":"GBP","in_stock":true},{"title":"285 × 1200 mm","offer_id":61853954048330,"sku":"DG-CMPDR-285x1200","price":49.0,"currency_code":"GBP","in_stock":true},{"title":"400 × 1000 mm","offer_id":61853954081098,"sku":"DG-CMPDR-400x1000","price":57.0,"currency_code":"GBP","in_stock":true},{"title":"600 × 1200 mm","offer_id":61853954113866,"sku":"DG-CMPDR-600x1200","price":102.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/3515\/2458\/files\/double-glazed-sealed-unit-igu-product-cutaway_a68065e5-34c2-4678-9c1c-81d86620d715.webp?v=1779018549","url":"https:\/\/panerelief.co.uk\/products\/composite-door-glass-insert-toughened-laminated","provider":"Pane Relief","version":"1.0","type":"link"}