An independent, curated log of the developments that matter — new products, partnerships, standards and milestones — plus our own analysis where we have something to add. It isn't exhaustive, and every entry links to a primary source or opens our full write-up.
A household-name manufacturer adopting vacuum glazing for a mainstream product line is a bigger signal than the spec sheet suggests — and roof windows happen to be where the physics of a vacuum really pays off. Our take.
Read our analysis →The US start-up V-Glass secured a $3 million seed round (led by the Grantham Foundation) plus a $1 million ARPA-E grant to scale up its room-temperature, metal-welded vacuum glazing — an approach aimed at reaching conventional insulated-glass cost.
BusinessWire ↗VELUX's Heritage roof window — using tempered vacuum glazing developed with Guardian Glass — launches in Britain and Ireland, quoting a whole-window Uw of 1.0 W/m²K (0.83 in a hybrid build with 38 dB acoustic). It brings VIG into the rooflight market, where a vacuum unit's performance doesn't fall off at a shallow angle.
VELUX press ↗LandVac's UK arm launched a 25-year warranty, and Fineo now backs its glass for 20 years, up from 15. For a technology whose one real question has always been 'how long will the seal last?', makers extending their guarantees is a signal worth reading — with a couple of caveats.
Read our analysis →The two firms announced a partnership to develop tempered vacuum insulated glass, the collaboration that later produced the VELUX Heritage roof window.
Guardian Glass ↗The vacuum-glass standard gains Part 3, defining test methods for how a rigid-edge-sealed VIG behaves under a temperature difference between its panes — a key durability concern for frit-sealed units.
ISO ↗Europe's flagship vacuum glazing enters production at Lodelinsart. Fineo later became the first VIG to gain CE marking and a third-party environmental product declaration, and is notable for having no visible pump-out port.
AGC Glass Europe ↗The joint development that produced Fineo, combining Panasonic's low-temperature sealing know-how (from its display and refrigeration work) with AGC's glass processing.
Panasonic ↗The first fully tempered vacuum glazing, using a low-temperature seal that keeps the glass toughened — unlocking safety glass, a sparser pillar array and larger, curtain-wall formats.
LandGlass ↗Nippon Sheet Glass launches Pilkington Spacia in Japan, commercialising the vacuum-glazing design invented at the University of Sydney in 1989.
NSG history ↗China is now the largest vacuum-glass manufacturing base, with makers like HaanGlas and LEADUS pushing tempered and large-format units. LEADUS even shows “vacuum photovoltaic glass” that builds a solar-generating layer into the sealed unit.
LEADUS ↗Most vacuum glass sold in Britain is imported, but PassivGlas is a UK-based brand offering toughened units (U-values as low as 0.44 W/m²K, acoustic performance UKAS-tested) with a domestic supply chain.
PassivGlas ↗England's Approved Document L already requires replacement windows to hit 1.4 W/m²K or a WER of Band B — a bar vacuum glazing clears comfortably. As standards tighten toward net-zero, slim high-performance glass gets more attention, especially for heritage stock.
Approved Document L (gov.uk) ↗Spotted a development we should add? Email [email protected]. Listing a company or product here is coverage, not endorsement — see our about page.
