Experience of vacuum double glazing windows?

[paralla]

I've just bought a grade 2 listed property and looking at options for replacement windows.

It has 600mm thick stone walls and because of the listing we can't do much to improve the insulation of the walls, which leaves the ceiling and windows as potential areas of improvement.

The new window frames have to be wooden and the glass has to be "heritage double glazing" that uses a 4mm or 6mm cavity.

I've just read up on vacuum insulated glass that's thin enough to satisfy listed building consent while outperform conventional double glazing in terms of its thermal properties and especially it's acoustic properties.

It's a relatively new product, I wondered if anyone has experience of it and their thoughts?
https://www.fineoglass.eu/

I haven't been brave enough to get a quote for new windows yet. There are sixty windows.

[paralla]

TooLateForAName said:

There used to be a system that had tiny stents propping the sheets of glass apart - you could see a very faint pattern

That’s it. There are tiny glass pillars in a grid pattern between the two panes keeping the them apart. If you get up close you can just make them out.

[paralla]

TheInternet said:

If it's like the stuff I've seen I think you ought to get a sample and see how you feel about the dots all over it. They could be anything from an non issue to a massive irritation depending on the setting and your disposition. Consider it in different lighting scenarios too.

Good shout. I had a close look at it at a Home Renovation Show and could hardly see the pillars but that was under indoor lighting. I might get a sample pane of it and rest it up against the windows in the new house for an extended test drive. Low sunlight might refract off the glass pillars and be far more noticeable than the pillars themselves in soft indoor light.

[paralla]

Little Lofty said:

Strict new regs for windows on the horizon that will probably require triple glazing or vacuum glazing such as Fineo. Vacuum can apparently out performs triple glazing, but is extremely expensive. It is similar to laminated but instead of a plastic membrane between the glass sheets it has a 0.1mm vacuum, clever stuff.

Edited by Little Lofty on Wednesday 24th January 00:20

In hindsight I probably should have had an idea what timber heritage double glazed or vacume glazed windows cost since the house has sixty windows.