Apparently new double glazed panels are or should be date marked.
But where? I cannot see any date. Is it on the plastic spacer or the glass? or does it need UV light, a polarising filter or some such to become visible?
Apparently new double glazed panels are or should be date marked.
But where? I cannot see any date. Is it on the plastic spacer or the glass? or does it need UV light, a polarising filter or some such to become visible?
My sealed units are dated inside on the metal strip - visible by looking straight down into the bottom of the window.
Hellraiser..........>
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