Why Are My Windows Steaming Up?

Our customers often ask us: ‘Why Are My Windows Steaming Up?’ Many homes across Northamptonshire experience misty, foggy or wet windows, especially in colder months.

It can be frustrating, and it often raises questions about insulation, ventilation and whether your windows need repairing or replacing.

At Mo Windows, we help customers understand what’s going on and what can be done to fix it.

Why Windows Steam Up

When warm, moist air in your home touches a colder surface like glass, it turns into condensation. This is what causes that foggy appearance. Common reasons include:

• Everyday activities such as cooking, boiling the kettle, showering or drying clothes indoors.
• Poor ventilation, which traps moisture inside.
• Older windows that don’t insulate as well, making the glass colder and more likely to attract moisture.
• Damaged or failed seals that let cold air into the window unit.

A little condensation on the inside of the glass can be normal, especially in winter. However, condensation appearing between the panes of your double glazing is a sign that something is wrong.

When Steamed-Up Windows Can Be Fixed

If the moisture is inside your home and collecting on the surface of the glass, good ventilation can help. Try:

• Opening trickle vents
• Running extractor fans
• Keeping a small gap in windows when possible
• Avoiding drying clothes in living spaces

These simple steps often reduce surface condensation. If that’s the only issue, the good news is that your windows may not need replacing.

When Windows Need Replacement

Condensation between the panes of double glazing means the sealed unit has failed. When this happens:

• Insulation drops
• Heating escapes more easily
• Windows may look misty all the time
• Draughts can become a problem

At this point, the unit usually needs replacing. In some cases, the whole frame can stay in place and only the sealed glass unit is changed, which is a quicker job than a full replacement.

However, if your windows are older, struggling to keep heat in or showing signs of wear, a full upgrade might be the best long-term option.

Modern uPVC windows provide better energy efficiency, security and noise reduction, which makes a noticeable difference in how your home feels day to day.

How Mo Windows Can Help

At Mo Windows, we work with customers across in Wellingborough, Kettering, Corby, Market Harborough and Northampton who are dealing with windows steaming up and want a clear, reliable solution. Our team can:

• Check whether the issue is a failed sealed unit
• Advise whether repair or replacement is the best option
• Supply and fit high-quality, energy-efficient uPVC windows
• Provide a tidy, friendly and stress-free installation service

Ready to Clear Up Steamed-Up Windows?

If you’re tired of dealing with misty panes or want to understand why your windows keep steaming up, get in touch with the Mo Windows team. We’re always happy to take a look, offer honest advice and help you choose the right solution for your home.