Double glazing or secondary glazing – which should I choose? - Double glazing, secondary glazing, triple glazing and even ...

Regular double glazing gets its insulating properties from the inert gas placed between the glass sheets — often the noble gas argon. But with a vacuum, you don’t need that much of a gap.

D avid Vermeulen, the Midwest territory manager for Technical Glass Products, spends a lot of time talking with Building Teams about impact glazing and fire-rated glass. “There’s still a little ...