The independent guide to Vacuum Insulated Glass
Vacuum Insulated Glass, Explained.
Independent guides, comparisons and technical insights on Vacuum Insulated Glass (VIG) for buyers, architects, window manufacturers and glazing professionals.
The pillar explainer
What is VIG and how does it work?
The complete reference: construction, U-value, standards, common failure modes, and where VIG actually fits.
Read the complete guide →
Side-by-side comparison
VIG vs double glazing
When each system makes sense. Thickness, thermal performance, heritage suitability, cost, availability — without ranking either as universally better.
See the comparison →
VIG at a glance
A short reference table. All values are anchored to primary standards, manufacturer datasheets, or independent test reports — see thecomplete guide for sources and full discussion.
| Factor | Vacuum Insulated Glass | Conventional double glazing |
|---|---|---|
| Typical total thickness | Manufacturer-reported Roughly 6–10 mm | Typically 20–28 mm |
| Centre-of-glass Ug (low-e) | Manufacturer-reported ~0.4–0.7 W/m²K | Manufacturer-reported ~1.0 W/m²K (specified low-e argon build-ups) |
| Heritage-window suitability | Strong fit — slim profile retains original frames and sightlines | Often simpler if rebate is already sized for double glazing |
| Supply-chain maturity | Specialist; smaller manufacturer base | Mature global supply chain |
| Unit cost | Generally higher per square metre than commodity double glazing | Generally the lower-cost option at unit level |
Full comparison: thickness, weight, acoustic, safety, durability, sustainability →
What this site covers
VIG Guide focuses on Vacuum Insulated Glass (VIG) — also called vacuum glazing — a sealed double-pane unit with a sub-atmospheric cavity that delivers triple-pane thermal performance in a slim profile. The site is built around two indexable deep-dives (above) plus a directory of supporting topic clusters: Learn, Brands, Manufacturers, Applications, and Technical.
Learn
Background knowledge, pillar explainers, and topic-cluster deep-dives on VIG.
Brands
Product profiles from established VIG brands and emerging challengers.
Manufacturers
Companies, factories, and geographies that produce VIG at scale.
Applications
Heritage windows, sash windows, steel frames, curtain wall, and sloped glazing.
Technical
Standards, U-values, durability, edge seals, and pillar mechanics.
How this site is researched
Every quantitative claim is anchored to a primary standard (ISO / CEN / EOTA EAD), a peer-reviewed paper, or a clearly-labelled manufacturer datasheet. VIG Guide does not run its own laboratory or visit every factory; this is stated explicitly on every deep-dive.
Read the methodology,editorial policy, andcommercial disclosure.