4mm Low-E Toughened (TGH) / 6mm Xenon cavity / 3mm Float
Request made-to-measure heritage double glazing combining 4mm Low-E Toughened (TGH) on the inside, a 6mm Xenon gas cavity and 3mm Float as Panel 2. This separate 13mm nominal sealed-unit make-up is available to discuss with a specialist supplier.
Exploded Sealed Unit Architecture
Heritage double glazing with a 3mm float pane
This 3mm float second-pane option is for a slim heritage double-glazing enquiry where rebate depth and the finished sealed-unit thickness need particular attention. Provide your existing glass size and frame details so the supplier can check the proposed replacement.
For this 3mm Float product, the selected 6mm cavity and Xenon gas give an indicative U-value baseline of 1.2 W/m²K. Panel 1 is 4mm Low-E Toughened (TGH); Panel 2 is 3mm Float. The total nominal unit thickness is 13mm. Confirm your rebate depth, sightline, spacer colour and the declared thermal performance with the supplier before ordering.
Choosing 3mm Float 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.