Double Glazing

[nikaiyo2]

5potTurbo said:

A rated is triple glazed, isn't it?

(Currently building a passive A rated house)

No

Not necessarily most UPVC A rated is not triple, it is in Ali. Triple glazing is not necessarily better than double, unless you have 32 or 36mm overall thickness there is no sense having triple

U can achieve A ratings with a U value (the heat lost) 20% worse than a C rating