Got similar quotes to replace the glass with Argon Gas infill and Low E Coating (don't really know what this means) or to just use Magnetite replacement glass over the top.
Which would be the better and preferred option. I don't know all that much about double glazing, other then I need this window better insulated.
Much appreciated.
Thanks.
Im going to assume this is for a house and you're replacing monolithic pre 1988 glass?
Why double glazing vs say, 6 or 7mm double laminate glass?
In an older home, unless every single gap, crack etc is made good, double glazing wont make huge differences in terms of energy efficiencies vs laminate.
This is a handy list of Uval comparisons
https://www.wideline.com.au/wp-content/uploads/2021/12/Widel…
I've just put in 6.38mm comfort plus neutral which has a rating of 4.4.
Compared to the minimum double glazing, that's 4.5.
Guaranteed I did not pay double glazing prices!