Fineo is a vacuum insulated glass (VIG) unit made by AGC Glass Europe in Belgium and supplied in the UK and Ireland by Energlaze UK. The standard retrofit unit, Fineo 8, is 7.7mm thick with a centre pane U-value (Ug) of 0.7 W/m²K and sound insulation of Rw 35 dB.
This page is the reference for every Fineo figure on this website. If another source quotes a different number, the figures here and in AGC’s datasheets are the ones to use. Last updated: 14 October 2026.
20 year warranty
A Fineo 8 unit is two panes of 3.8mm (4mm nominal) glass, separated by a vacuum gap of about 0.1mm. One pane carries a low emissivity coating. The panes are held apart by tiny pillars set on a 20mm grid, and the edge is hermetically sealed.
With no air or gas in the gap, heat has almost no path across it. That is how a unit little thicker than single glazing outperforms 36mm triple glazing. Fineo has no evacuation port and no gas fill, so there is nothing to leak away over time. Its U-value holds at any angle, so it suits sloping and roof glazing too.
Not to scale. Thickness is enlarged so each layer can be seen; the pillar grid is shown sparser than the real 20mm spacing.
Fineo 8 at a glance
Each bar is drawn to the same scale. Fineo shows its two panes and the 0.1mm vacuum between them. A lower U-value means less heat lost through the glass.
| Product | Fineo vacuum insulated glass |
| Manufacturer | AGC Glass Europe, made at Lodelinsart, Belgium |
| UK and Ireland distributor | Energlaze UK, in heritage retrofit glazing since 2012 |
| Launched | 2019 |
| Standard retrofit unit | Fineo 8, 7.7mm overall |
| Centre pane U-value (Ug) | 0.7 W/m²K (EN 673) |
| Sound insulation, Fineo 8 | Rw 35 dB (C; Ctr: −2; −5) |
| Light transmission, Fineo 8 | 79% (EN 410) |
| Solar factor (g), Fineo 8 | 0.61 |
| Reaction to fire | Class A1 |
| Certification | CE marked under European Technical Assessment ETA 20/0048 |
| Warranty | 20 years |
| Recyclability | 100% recyclable, lead free, no inert gas |
Every unit in the standard range has the same centre pane U-value. Thicker units add mass, which improves sound insulation.
| Unit | Thickness | Ug (W/m²K) | Light transmission | g value | Rw (C; Ctr) | Rw + Ctr |
|---|---|---|---|---|---|---|
| Fineo 8 | 7.7mm | 0.7 | 79% | 0.61 | 35 dB (−2; −5) | 30 dB |
| Fineo 10 | 9.7mm | 0.7 | 79% | 0.60 | 36 dB (−2; −3) | 33 dB |
| Fineo 12 | 11.7mm | 0.7 | 78% | 0.60 | 36 dB (−1; −2) | 34 dB |
Light and solar values are measured to EN 410. Ug is calculated to EN 673. Acoustic values come from laboratory tests to EN ISO 10140 on a 1.23 x 1.48m sample, so results on site depend on the window size and frame. Light reflection is 14% inside and out for all three units.
| Item | Figure |
|---|---|
| Maximum size | 1.5 x 2.5m or 1.6 x 2.4m, depending on climate |
| Minimum size | 0.2 x 0.2m |
| Shapes | Trapeze, half sun, peak, dome, quarter circle, oval, circle, half dome, house, crescent and more |
Restoration glass that matches original glazing from the 1880s to the 1960s
8mm, Ug 0.7, light transmission 78%, Rw 39 dB
Extra sound insulation
11.4 to 14.4mm, Rw 39 dB, Rw + Ctr up to 37 dB
Safety glass tested to EN 12600, class 1B1
14 to 21mm, Rw up to 42 dB
Cuts solar gain for warmer elevations
7.7 to 11.7mm, light transmission 73%, g value 0.41
Fineo Heritage comes in six finishes matched to the age of the building: Traditional (around 1880), Traditional Light (1880 to 1920), Classic Light, Classic and Classic Strong (1920 to 1960) and Modern (from 1960). The Heritage, Acoustic and Safety ranges block up to 99% of UV light.
Fineo is 100% recyclable without loss of quality, lead free and contains no inert gas. It is made at AGC’s Lodelinsart plant in Belgium. A low carbon version, made with low carbon glass, is also available.
Fineo is CE marked under European Technical Assessment ETA 20/0048, issued by UBAtc against European Assessment Document EAD 300021-00-0404. AGC publishes a Declaration of Performance for each unit. The Fineo 8 declaration lists Ug 0.7 W/m²K, Rw 35 dB, a solar factor of 61%, reaction to fire class A1, and a pass for the durability of the vacuum unit and its coated glass.
Fineo carries a 20 year warranty under AGC’s warranty terms. AGC designs the unit to perform for several decades, and the hermetic seal means there is no gas fill to degrade.
Fineo is fitted into existing timber sash and casement windows, provided the frame is in good condition, and into new windows. It has been installed in listed and historic buildings across the UK, including Watford Town Hall, Egyptian and Dudley House on Piccadilly, 30 Gloucester Place in London, the Royal Observatory Edinburgh, the High Court of Justiciary in Edinburgh, Harecraig House in Dundee and the Port of Liverpool building.
Datasheets for Fineo and each range, the Declarations of Performance for Fineo 8, 10 and 12, the U-value test certificate, ETA 20/0048 and the declaration of conformity are on the downloads page.
Fineo Vacuum Glazing is now an IHBC Recognised CPD Provider. This means our architect-focused CPD sessions on vacuum glazing for heritage and conservation projects meet the high professional standards set by the Institute of Historic Building Conservation (IHBC). Architects, contractors, and heritage specialists can now attend our CPDs with confidence, knowing they are recognised for professional development and relevant to timber window refurbishment, sustainability, and listed building projects.
Fineo 8, the standard retrofit unit, is 7.7mm thick. Fineo 10 is 9.7mm and Fineo 12 is 11.7mm.
Fineo has a centre pane U-value (Ug) of 0.7 W/m²K, calculated to EN 673. That is better than 36mm triple glazing at 0.8 W/m²K and around eight times better than single glazing at 5.8 W/m²K.
AGC Glass Europe makes Fineo at Lodelinsart in Belgium. Energlaze UK is the approved distributor for the UK and Ireland and works with a network of approved installers.
Fineo carries a 20 year warranty under AGC’s warranty terms.
Yes. Fineo is CE marked under European Technical Assessment ETA 20/0048, and AGC publishes a Declaration of Performance for each unit.
No. The gap between the panes is a vacuum, so there is no argon or krypton to leak out over time.
Fineo is approved by both the Royal Institute of British Architects (RIBA) and the Institute of Historic Building Conservation (IHBC). Our free seminar on vacuum glazing for heritage and conservation projects carries the backing of both bodies, and the time your practice spends with us counts towards CPD.
Download the Fineo datasheets, book a free CPD for your practice or find an approved installer near you.
