| 摘要 |
A glazing unit comprises at least two glazing sheets 12 a spacer 16 disposed between the glazing sheets and forming a channel between the edges of the glazing sheets; and a filler/bonder 20, for example of hot-melt adhesive, disposed in the channel and bonded to the glazing sheets and spacer to hold them together and a vapour barrier layer 24 of a material which is impervious to water vapour which extends around and is bonded to the outer edge of the glazing unit and covers the outer edge of the filler/bonder. The vapour barrier may be an adhesive tape, preferably a metallic tape, for example copper tape, aluminium tape or lead tape, or an alloy tape of those three metallic elements. A method of manufacture is also claimed. The arrangement may be use for triple glazing or more with a separate spacer and bonder and a single vapour barrier.
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