Repairing Double Glazed Windows When Double-glazed windows "blow" they let the insulating gas argon escapes, causing them decrease their energy efficiency. The good news is that blown double glazing is often repaired without the need to replace the windows. Moisture or condensation in between your double-glazed windows is a typical https://www.repairmywindowsanddoors.co.uk/dorking-windowrepair/