In article ,
Brian Gaff wrote:
Also if there are drafts from the original windows, secondary glazed
sliding panels can rattle annoying ly!

To work correctly, sound wise, both need to be air sealed. Which means the
secondary glazing should have runners similar to that used on cars which
holds the glass firmly.

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*My dog can lick anyone

Dave Plowman London SW
To e-mail, change noise into sound.