Vacuum Insulating Glass (VIG) Manufacturer | U ≤ 0.45 W/m²K

Name: Vacuum Insulating Glass (VIG)
Brand: Supertech
SKU: ST-VIG

Key Facts

U-value ≤ 0.45 W/(m²·K) — ≈ 4× better than standard insulating glass

Total thickness ≈ 8.3 mm: passive-house performance in a retrofit-friendly pane

Sound insulation up to 42 dB — vacuum blocks airborne noise transmission

Internal vacuum 0.01 Pa; internal dew point below −60 °C (no internal condensation)

Fully tempered safety glass, no pump-out port, lead-free edge sealing

Vacuum insulating glass (VIG) consists of two glass panes separated by a 0.3 mm evacuated gap sealed at the edges with a lead-free alloy solder. With the cavity evacuated to 0.01 Pa, gas conduction and convection disappear, giving a center-of-glass U-value of ≤ 0.45 W/(m²·K) — about four times better than conventional double glazing, in a unit less than half the thickness of triple glazing.

Supertech VIG is fully tempered and produced on a continuous line without a pump-out port, eliminating the visual stem and the classic slow-leak failure point. A built-in getter maintains the vacuum over the service life.

Why architects choose VIG

Passive-house U-values at 8.3 mm

A triple-glazed Low-E unit needs 36–44 mm and heavy frames to reach a similar U-value. VIG delivers it in ≈ 8.3 mm and roughly one third of the weight — ideal where frame depth, sightlines or sash capacity are limited.

Heritage and retrofit ready

Because VIG fits existing single-glass rebates, historic windows can be upgraded to modern energy codes without replacing frames — a growing requirement in EU renovation programs.

Quiet by physics

Sound needs a medium; a vacuum has none. VIG achieves up to 42 dB weighted sound reduction, outperforming much thicker laminated assemblies on traffic-noise frequencies.

Engineered for longevity

Fully tempered panes, lead-free alloy edge sealing without an extraction port, and an internal getter that keeps the vacuum at 0.01 Pa — the failure modes of first-generation VIG are designed out.

Technical Specifications

Vacuum insulating glass — typical technical data
Property	Value
U-value (center of glass)	≤ 0.45 W/(m²·K)
Comparison	≈ 4× the thermal performance of standard double-glazed insulating glass
Total thickness	≈ 8.3 mm (4 + 0.3 V + 4); other builds and hybrid IGU laminates available
Internal vacuum	0.01 Pa, maintained by built-in getter
Sound insulation	Up to 42 dB (weighted)
Internal dew point	Below −60 °C — no internal condensation in service
Glass type	Fully tempered safety glass; Low-E coating options
Edge seal	Lead-free alloy solder; no pump-out port (flat, all-glass appearance)
Weight vs. triple glazing	Roughly one third at comparable U-value

Frequently Asked Questions

What is the U-value of vacuum insulating glass?

Supertech VIG achieves a center-of-glass U-value of ≤ 0.45 W/(m²·K). Standard double glazing is typically 2.6–2.8, argon-filled Low-E double glazing around 1.1–1.3, and triple glazing 0.5–0.8 W/(m²·K). VIG therefore matches or beats triple glazing in a unit of roughly one quarter the thickness.

How is the vacuum maintained over the life of the glass?

The edge is hermetically sealed with a lead-free alloy solder — not an organic sealant that ages — and the unit contains a high-efficiency getter that adsorbs any residual gas molecules. Production without a pump-out port removes the most common leak path of early VIG designs.

Can VIG replace single glass in old window frames?

Usually yes. At about 8.3 mm and one third of triple glazing’s weight, VIG fits most existing rebates for single or thin double glass, which makes it the standard solution for heritage retrofit projects where frames must be preserved.

Is vacuum insulating glass safe?

Supertech VIG uses fully tempered safety glass for both panes, and the pillar array between the panes is designed to carry atmospheric pressure permanently. Units are produced without an evacuation stem, so there is no protruding weak point on the surface.