Solving the Mist Mystery: Condensation Between Double Glazed Windows
Thursday, 22 August 2019
Our homes may not be able to talk to us, but they can whisper clues when things aren't quite right. Windows that mist up could be murmuring a hint that we need to take action.
Mind the gap. Look at condensation between panes of glass as a window of opportunity. It's a chance to get things sorted.
Here's how to resolve the issues surrounding condensation inside your double glazed windows.
Key Causes of Condensation Between Glass
The air or gas between the glass panels stays at a consistent temperature. This reduces heat loss.
Most modern windows have two seals — there's an inner seal to protect against moisture and corrosion. There's also an outer seal to protect the strength of the window.
The seals hold a spacer in place. This is typically a tube containing water-absorbing chemicals. When the seals fail, condensation gets inside, causing the glass to mist up the window.
The seal can break for a variety of reasons.
It could be down to the age of the window. It might be due to how it was manufactured or fitted. Chemical cleaning materials used on the window could also damage the seal.
Reducing the Risk
To help prevent condensation in double glazing, check the seals regularly. You can do this by running your finger around the edge of the window to look for any gaps in the sealant.
It may also be advisable to minimise the humidity in your property. If there is excess moisture in the air, it will condense on cooler surfaces. Ensure that your home is well-ventilated.
You may also need to use a dehumidifier.
Negative Impacts
If the inside of the double glazed panels is misting up, then it means your windows will not be as efficient at keeping the heat in. This is going to mean higher energy bills and negate one of their key purposes.
It may also mean less peace and quiet, because energy-efficient windows insulate your home against external noise.
The cash wasted through heat loss could be eliminated by repairing or replacing the failed windows or sealed units.
Repairs and Replacements
If you attempt to repair the units yourself, you will probably invalidate any guarantees you still have. If you do not have cover, then you may need to replace faulty units with new ones. Call an expert for an opinion.
A specialist repair company might be able to recondition a faulty unit. The unit can be pumped with a drying agent, then cleaned and coated with an anti-fogging product.
The root cause of the problem must be sorted, too — and that means resealing the unit as part of the repair process. These types of fixes do not generally last for a long period of time. The best alternative may be to replace the window unit.
Keep the Benefits of Double Glazed Windows
If your double glazed windows are misting up inside the gap, then it means you won't be getting the maximum benefit from them. It may be possible to fix them, at least temporarily, but it may be even better to replace them.
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