{"product_id":"shaped-triple-glazed-unit-arched-raked-circular","title":"Shaped Triple Glazed Unit (Custom Cut — Arched \/ Raked \/ Circular)","description":"\n\u003cp class=\"pr-flagship__lede\"\u003e\u003cstrong\u003eTriple glazing for the non-rectangular aperture\u003c\/strong\u003e. Shaped sealed units — arched-top windows, raked-top apex casements, circular portholes, elliptical bullseyes, Gothic-point ecclesiastical glazing, sliver and wedge cuts for gable apex insets — are cut to owner-supplied template or measured site survey. The 36mm triple-glazed build delivers full A-rated WER performance in geometries that standard stock units cannot serve.\u003c\/p\u003e\n\n\u003cp\u003eMost shaped-glazing demand sits in three buckets: heritage \/ period homes with original arched or Gothic-point sashes; modernist architectural casements where the apex of a gable or the curve of a cantilever is fully glazed; and conservatories \/ orangeries where roof-tile alignment forces non-rectangular side panels. This flagship handles all three via the same template-driven cut workflow.\u003c\/p\u003e\n\n\u003ch2\u003eTechnical specification (base 36mm triple build)\u003c\/h2\u003e\n\u003ctable class=\"pr-spec-table\"\u003e\n  \u003ctr\u003e\n\u003cth\u003eOverall thickness\u003c\/th\u003e\n\u003ctd\u003e36mm\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBuild-up\u003c\/th\u003e\n\u003ctd\u003e4mm clear \/ 12mm argon \/ 4mm clear with Planitherm Total+ soft-coat (face 3) \/ 12mm argon \/ 4mm clear\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\u003eSpacer bar\u003c\/th\u003e\n\u003ctd\u003eWarm-edge composite, black — twin spacers contoured to shape\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eU-value (centre-pane)\u003c\/th\u003e\n\u003ctd\u003e0.8 W\/m²K\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eg-value\u003c\/th\u003e\n\u003ctd\u003e0.50\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eLight transmittance\u003c\/th\u003e\n\u003ctd\u003e~71%\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eBFRC Window Energy Rating\u003c\/th\u003e\n\u003ctd\u003eA or A+ (depending on frame, area, ratio)\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eStandards\u003c\/th\u003e\n\u003ctd\u003eBS EN 1279 (parts 1-6), BS EN 673, BS EN 410\u003c\/td\u003e\n\u003c\/tr\u003e\n  \u003ctr\u003e\n\u003cth\u003eShape capability\u003c\/th\u003e\n\u003ctd\u003eArched-top, raked-top, circular, elliptical, Gothic-point, trapezoid, wedge, bespoke per template\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eShape categories we cut\u003c\/h2\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eArched-top (Roman arch, segmental arch, semi-circular)\u003c\/strong\u003e — period property top-light windows, Georgian and Victorian arched casements. Template: bottom dimensions + arch radius \/ springing height.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRaked-top (sloped-top apex casement, gable inset)\u003c\/strong\u003e — modern architectural glazing on gable ends, dormer cheek casements. Template: 3-corner dimensions + apex angle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCircular and elliptical (bullseye, porthole, oval)\u003c\/strong\u003e — period villa portholes, contemporary feature glazing. Template: diameter (circle) or major\/minor axes (ellipse).\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGothic-point (lancet, pointed-arch)\u003c\/strong\u003e — ecclesiastical and church-conversion glazing, neo-Gothic period houses. Template: base width + apex height + point angle.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eTrapezoid and wedge cuts\u003c\/strong\u003e — gable apex slivers, stair-half-landing tall glazing, infill panels in skylight runs.\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCompound shapes (arch + base rectangle, arch + raked, bespoke)\u003c\/strong\u003e — fully bespoke per CAD or scanned template.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eSquare or rectangular triple glazing is faster and cheaper — see the \u003ca href=\"\/products\/36mm-standard-triple-glazed-unit\"\u003e\u003cstrong\u003e36mm Standard Triple Glazed Unit\u003c\/strong\u003e\u003c\/a\u003e for stock-size rectangular triple. For shaped doubles (less expensive, less thermal performance), see the \u003ca href=\"\/pages\/double-glazing\"\u003e\u003cstrong\u003edouble-glazing topical page\u003c\/strong\u003e\u003c\/a\u003e. For shaped acoustic or safety triple, configure via the \u003ca href=\"\/pages\/configure\"\u003econfigurator\u003c\/a\u003e after selecting the shape category.\u003c\/p\u003e\n\n\u003ch2\u003eTemplate requirements\u003c\/h2\u003e\n\u003cp\u003eFor shaped triple, we need a template — either a physical cardboard \/ hardboard template at 1:1 scale, or a CAD file (DWG \/ DXF \/ SVG \/ PDF with measured dimensions), or photographs with reference measurements (tape measure visible at the four cardinal points). Templates are bonded to the cutting glass during production, so accuracy at template stage = accuracy at delivery stage.\u003c\/p\u003e\n\n\u003cp\u003eFor circular and elliptical units, a measured radius \/ major-axis \/ minor-axis sometimes suffices without template, provided the aperture is true (not slightly squashed from frame movement). For all other shapes, send a template — the configurator includes upload paths for CAD and photo.\u003c\/p\u003e\n\n\u003ch2\u003eStock pricing — rectangular reference only\u003c\/h2\u003e\n\u003cp\u003eThe \"stock sizes\" below are notional reference points for cost expectation; the actual shaped unit price is per-shape per-template, quoted within 24 hours of template receipt. Use these as a comparison anchor: a shaped triple costs roughly 1.3-1.6× the equivalent-area rectangular triple, depending on cut complexity (arched: 1.3×; raked: 1.4×; circular: 1.5×; bespoke: 1.6×).\u003c\/p\u003e\n\n\u003ch2\u003eCertification and standards\u003c\/h2\u003e\n\u003cp\u003eEvery shaped unit ships with: UKCA mark, BS EN 1279 Declaration of Performance, argon-fill certificate, shape-specific manufacturing record (template ID + cut tolerances ± 1.5mm), and BFRC WER calculation where the shape is large enough to register against the calculation methodology. For listed-building consents, we provide a heritage-glazing compatibility statement on request.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003ch3\u003eHow accurate are shaped cuts?\u003c\/h3\u003e\n\u003cp\u003eTolerance is ±1.5mm on linear dimensions, ±1.0° on angles, ±0.5mm on radius for circular and elliptical. Within those tolerances, the unit drops into a properly-templated rebate. The most common fitting failure is template error, not manufacturing error — get the template right and the cut is right.\u003c\/p\u003e\n\n\u003ch3\u003eLead time for shaped triple?\u003c\/h3\u003e\n\u003cp\u003e14-21 working days from template approval. Arched and raked add 4-7 days over rectangular triple; circular and elliptical add 7-10 days; compound shapes add 10-14 days. Template approval is sometimes a 2-3 day back-and-forth if measurements need refining — order earlier rather than later for project deadlines.\u003c\/p\u003e\n\n\u003ch3\u003eCan I get shaped acoustic or safety triple?\u003c\/h3\u003e\n\u003cp\u003eYes — both are configurable via the \u003ca href=\"\/pages\/configure\"\u003econfigurator\u003c\/a\u003e. Shaped acoustic triple (with PVB interlayer in the middle pane) is straightforward; shaped safety triple (toughened outer \/ laminated middle) needs the safety-glass stack to be cut, toughened, and assembled before lamination — adds 5-7 days lead time.\u003c\/p\u003e\n\n\u003ch3\u003eHeritage \/ listed-building compatibility?\u003c\/h3\u003e\n\u003cp\u003eFor listed buildings, conservation officers typically permit shaped triple glazing where: (a) the sightline matches the original single-glazed unit; (b) the spacer bar is dark \/ recessed so it doesn't read as a modern cavity; (c) the unit is set inside the original rebate without external evidence of the modern build. We provide a heritage-glazing statement on request. For the slimmest heritage build, see the \u003ca href=\"\/products\/12mm-histoglass-equivalent-slim-conservation-unit\"\u003e12mm Histoglass-Equivalent Slim Conservation Unit\u003c\/a\u003e — slim double glazing reads as single-glass-equivalent in most listed-building consents.\u003c\/p\u003e\n\n\u003ch3\u003eWhat if my measurements are slightly wrong?\u003c\/h3\u003e\n\u003cp\u003eTemplates that arrive with measurement errors are flagged before cut — we send back a \"measurement query\" with annotated photos asking for the dimensions in question. Cut-with-error-as-supplied units are not warranted against fit issues. Sending a physical cardboard template is the safest measurement method for tricky shapes; CAD is faster but requires good source data.\u003c\/p\u003e\n\n\u003ch3\u003eWill shaped triple fit in a 28mm-rebated frame?\u003c\/h3\u003e\n\u003cp\u003eNot directly — the base build here is 36mm. For 28mm-rebate frames, configure via the \u003ca href=\"\/pages\/configure\"\u003econfigurator\u003c\/a\u003e with the 28mm slim-rebate triple stack on a shaped template. The slim-rebate shaped triple is at the edge of manufacturing yield (thin panes + shape + dual cavity = more rejected units), so price is roughly 1.8-2.0× the rectangular slim-rebate triple.\u003c\/p\u003e\n\n\u003ch3\u003eWarranty on shaped units?\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 low-E coating performance. Transit damage covered 14 days from delivery — shaped units need particularly careful handling at install, so brief the fitter on receipt protocol before delivery date.\u003c\/p\u003e\n","brand":"Pane Relief","offers":[{"title":"600 × 400 mm","offer_id":61855201952074,"sku":"TG-SHAPED-600x400","price":45.0,"currency_code":"GBP","in_stock":true},{"title":"800 × 600 mm","offer_id":61855201984842,"sku":"TG-SHAPED-800x600","price":71.0,"currency_code":"GBP","in_stock":true},{"title":"1000 × 800 mm","offer_id":61855202017610,"sku":"TG-SHAPED-1000x800","price":118.0,"currency_code":"GBP","in_stock":true},{"title":"1200 × 1000 mm","offer_id":61855202050378,"sku":"TG-SHAPED-1200x1000","price":176.0,"currency_code":"GBP","in_stock":true},{"title":"1500 × 1200 mm","offer_id":61855202083146,"sku":"TG-SHAPED-1500x1200","price":264.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0895\/3515\/2458\/files\/triple-glazed-insulated-glass-unit-igu-cutaway_b2a337b0-c696-4e39-9a44-265db774ab72.webp?v=1779039926","url":"https:\/\/panerelief.co.uk\/products\/shaped-triple-glazed-unit-arched-raked-circular","provider":"Pane Relief","version":"1.0","type":"link"}