Is Condensation on Double Glazed Windows Barking? A professional in the field of property advised that condensation on double-glazed windows may indicate a problem in your window fittings. Modern double-glazed windows comprise two panes of insulation glass sandwiched between them. This blocks the loss of heat from outside and keeps your home warmer in winter t https://www.ioram.co.uk/the-history-of-double-glazing-barking-in-10-milestones/