Curtains & blinds v. internal window shutters 

 I feel its the environment not the brand or make of double glazing.   Acid rain never really left us and sand blowing in from the Saharan work together to grind down any water seal in our homes over time.   And we all know buildings move with traffic vibration.  If you live in a windy damp spot even triple glazing wont last that long.

A few years ago I wrote a  thread on build in  designed redundancy.  Double glazing is another good example of this.  Unlike the old single  pane where it was easy to swap out any broken glass…. with double glazing you need to replace the whole window frame.  There made to measure and there no common sizes.   And company’s know you just wont replace one….. most people have all of them replaced at the same time.

Now can we get back on subject Ge