4mm Low-E Toughened (TGH) / 4mm Argon cavity / 6.8mm Acoustic
Request made-to-measure heritage double glazing combining 4mm Low-E Toughened (TGH) on the inside, a 4mm Argon gas cavity and 6.8mm Acoustic as Panel 2. This separate 14.8mm nominal sealed-unit make-up is available to discuss with a specialist supplier.
Exploded Sealed Unit Architecture
Acoustic glass for heritage window enquiries
Request a heritage sealed unit with a 6.8mm acoustic second pane when discussing a window project with noise concerns. Describe the noise source and existing frame, and supply any required acoustic rating. The supplier confirms the exact acoustic glass and evidence for the full proposed construction; no sound-reduction figure is assumed here.
For this 6.8mm Acoustic 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 6.8mm Acoustic. The total nominal unit thickness is 14.8mm. Confirm your rebate depth, sightline, spacer colour and the declared thermal performance with the supplier before ordering.
Choosing 6.8mm Acoustic 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.