4mm Low-E Toughened (TGH) / 4mm Argon cavity / 6mm Toughened
Request made-to-measure heritage double glazing combining 4mm Low-E Toughened (TGH) on the inside, a 4mm Argon gas cavity and 6mm Toughened as Panel 2. This separate 14mm nominal sealed-unit make-up is available to discuss with a specialist supplier.
Exploded Sealed Unit Architecture
Heritage double glazing with a 6mm toughened pane
Request a 6mm toughened second pane within your made-to-measure heritage double-glazing enquiry. Describe the window location, panel size and frame so the supplier can confirm the safety-glazing specification, available processing and installation requirements.
For this 6mm Toughened product, the selected 4mm cavity and Argon gas give an indicative U-value baseline of 2.6 W/m²K. Panel 1 is 4mm Low-E Toughened (TGH); Panel 2 is 6mm Toughened. The total nominal unit thickness is 14mm. Confirm your rebate depth, sightline, spacer colour and the declared thermal performance with the supplier before ordering.
Choosing 6mm Toughened for heritage double glazing does not establish planning or conservation permission. Your supplier should confirm the exact product, and any required appearance match or project approval must be checked separately.