• Does anyone have any experience with secondary glazing?

    We're gonna get some this Autumn but I'm finding it difficult to work out which is the best option between glass and plastic.

    Can't seem to find an impartial source for which has the lower u value. Glass sellers say glass does, and vice versa with plastic sellers.

  • I would trust the BBA qualification data for each material over any sales person (if that data is available)

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