Repairing Double Glazed Windows Double-glazed Windows "blow" they let the gas that insulates them, argon, escapes, causing them lose their energy efficiency. The good thing is that blowing double glazing is usually repaired without the need to replace the windows. Moisture or condensation in between your double-glazed windows is a https://www.repairmywindowsanddoors.co.uk/stevenage-windowrepair/