Specialist Architectural Glazing Engine

Heritage Sealed Unit Configurator

Configure slim sealed units for historic timber sashes and metal frames. Every specification derives from authoritative manufacturer rules and carries through to quotation.

1. Sealed Unit Glass Make-Up

Panel 1: Inside Glass (Always 4mm Softcoat Low-E)

Panel 2: Outside / Restoration Glass

Spacer Cavity Width (mm)

Insulating Gas Fill

Perimeter Sightline (Seal Height)

Spacer Colour

2. Dimensions, Quantities & Shape

Finished Width (mm)

Finished Height (mm)

Quantity

Unit Shape / Geometry

Window Position / Drawing Ref

Joinery / Rebate Notes

Unit 1 of 1

Interactive Cross-Section

Exploded Sealed Unit Architecture

Inside Pane4mm Low-E (Annealed)

Cavity & Gas4mm Argon

Outside Pane4.5mm Goethe glass (Annealed)

Nominal Depth12.5mm (±1mm)

Sightline Flange: 7mm

Spacer Finish: Warm-Edge (Black)

Secondary Seal: Polymer Heritage Butyl

Sightline is perimeter seal depth into rebate. Cavity is noble gas gap. Gas does not recolour glass.

Specification Summary

Inside Pane:4mm Low-E Float

Cavity & Gas:4mm cavity with Argon

Outside Pane:4.5mm Goethe glass

Nominal Thickness:12.5mm (±1mm overall unit thickness — supplier confirmation required)

Indicative U-Value:2.6 W/m²K — indicative baseline; confirm with supplier

Sightline & Spacer:7mm Black

Schedule Totals:1 Units

Calculated Area:0.40 m²

Quotation is bespoke and supplier-confirmed. No automatic instant price or payment checkout.