Repairing Double Glazed Windows When Double-glazed windows "blow" they let the gas that insulates them, argon, escapes, causing them to reduce their energy efficiency. The good thing is that blowing double glazing is usually repaired without needing to replace the windows. The presence of condensation or moisture between your double https://www.repairmywindowsanddoors.co.uk/suttoncoldfield-windowrepair/