Repairing Double Glazed Windows When Double-glazed windows "blow", the gas that insulates them, argon, escapes, causing them to decrease their energy efficiency. The good news is, blown double glazing is often repaired without the need to replace the windows. The presence of condensation or moisture between your double-glazed windows is https://www.repairmywindowsanddoors.co.uk/whitstable-windowrepair/