To think curtains should not flap/gust about on double glazed windows?

[DabblesinDebate]

we have this

have patio doors that might as well not be there

the blinds flap when it's windy

Are your vents open?
Phnarr!
Seriously, though,are they?

lol, quite possibly!

duh, wheres the stupidity emoticon?

You think you've got problems -my flap is flapping!

(thats the wooden flap on the inside of our letterbox in case you wondered)

Oooh. Sid James would have a field day!