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I can understand why Ukraine wants to build up glazing facilities. Glass is an absolute pain in the backside to transport in final form. It's heavy, fragile, and often large.
You can almost hear the shipping companies sucking air through their teeth!
As for the window upgrading, there is method to the madness. Adding 360mm of insulation to a roof space can drop the amount of heat lost in a house significantly more for the same money. Especially since the govt. will not give money to people for DIY materials (very sad).
For example, if a house has 20 square meters of single glazing. Heat loss of single glazing is 5wmk (5 watts of energy lost per meter per degree difference between outside and inside). If it's 0 outside, and 20 inside, that's 2KW of energy being lost per hour through the windows.
Replacing them with modern triple glazing (1wmk) saves us 1.6KW, at a cost of probably £10k, if not more.
A roof of 60 square meters, with an uninsulated value of 2.5wmk is 3KW of loss. Putting in 360mm of insulation would bring that to 0.18wmk, a 2.8KW saving, but the cost is likely closer to £3k, even with all the surveys involved.
And when you're rolling this out at a country level, with a limited budget to get it done, the lowest hanging fruit gets picked!