• Here’s a fun fact. My m8 is a window cleaner. He’s been rejigging his round this week to just do the old terraces with single glazed sashes. His water is freezing on contact with all the triple and newish double glazed windows but no such bother on single glazing.

  • very good practical demonstration of the benefits! Must be awful having single glazing at the moment. It was -7c here in Glasgow last night.

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