Replacement Double Glazed Units

Double glazing "blows" when a leak allows the insulating gas (usually argon) to escape, and regular air gets in. This typically happens through the window's seal - the black rubber strip that runs around the edge of the glass. Since the seal is the weakest part of the window, it's where leaks are most likely to occur.

There are several reasons why double glazing might blow, including:

• Poor installation: If the windows weren’t installed correctly, the seal could fail prematurely.
• Age: Over time, seals can degrade due to weather exposure and general wear and tear.
• Damage: Impacts from objects, severe weather, or even structural issues with your home can damage the seal.

You’ll notice your double glazing has blown when condensation appears between the panes of glass, and no matter how much you wipe the outside, it won’t clear up. This happens because water vapour from the outside can only get inside a double-glazed unit through a leak, as these units are supposed to be sealed tightly with the insulating gas between the panes.

Other signs that your double glazing is blown include:

• Drafts: If you feel cold air around the window, the insulating gas has likely escaped.
• Reduced energy efficiency: Higher heating bills may indicate that your windows aren’t insulating as well as they should be.

Why It’s Important to Fix It Quickly

It’s a good idea to address blown double glazing as soon as possible to:

• Save on energy bills by improving insulation.
• Prevent further damage to the window unit.
• Avoid health risks like mould growth from trapped condensation.

How to Fix Blown Double Glazing

Once your double glazing has blown, it’s important to fix it soon to restore your home’s insulation and prevent additional issues like mold. You have a couple of options for repair:

1. Replace the seal yourself (if you’re handy with DIY and the damage is minor).
2. Have the entire window unit replaced (which is often the best solution for major damage or age-related wear).

Getting it sorted sooner rather than later will help keep your
home comfortable and your bills under control!
07304 069235