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While window condensation might seem like a minor inconvenience, persistent moisture can lead to mould growth, damp issues, and even damage to window frames and walls.
It can also indicate underlying ventilation or insulation problems in your home.
In this blog, we’ll explore why condensation forms, how to prevent it, and what solutions are available to keep your windows dry and your home comfortable.
Many homeowners confuse standard window condensation with blown double glazing, but they are two different issues with different causes and solutions.
This happens when warm, humid air meets a cold glass surface, forming water droplets on the window. It can occur inside your home (on the room-facing side of the glass) or outside (on the outer pane). This is typically caused by high humidity levels and poor ventilation, and it can often be reduced with better airflow and moisture control.
If condensation appears inside the double glazed glass unit, between the two glass panes, this means the glass seal has failed. A blown unit loses its insulating gas, reducing energy efficiency and making the window less effective at keeping your home warm.
The only permanent solution for blown double glazing is a double glazed glass pane replacement, as the seal cannot be repaired.
We specialise in blown double glazed glass replacement to restore your window’s insulation and prevent further heat loss.
If you have blown windows, get in touch with us and get a free quote in minutes.
Condensation is a result of temperature differences and excess moisture in the air. Here are some of the main causes:
Everyday activities generate moisture in the air. Common sources include:
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When this moisture has nowhere to escape, it builds up, leading to condensation on colder surfaces like windows.
Homes with inadequate airflow trap humid air inside. This is especially common in modern houses with well-sealed windows and doors, where air exchange is minimal. Without proper ventilation, moisture accumulates, increasing the likelihood of condensation.
During winter, window glass is much colder than the warm indoor air. When the moist indoor air touches the cold surface, it rapidly cools down, causing condensation. This is why condensation is more noticeable on windows in the colder months.
Double glazed windows are designed to provide insulation, reducing the difference between indoor and outdoor temperatures. However, if the seal between the glass panes fails, the insulating gas escapes, reducing efficiency and allowing condensation to form inside the glass unit. This is a sign that the window unit has failed and needs replacing.
Condensation isn’t directly harmful, but it creates damp conditions that encourage mould and mildew growth. Mould spores can worsen respiratory issues, trigger allergies, and pose health risks, especially for those with asthma or breathing problems.
According to the NHS website, moulds produce allergens and toxic substances that when inhaled or touched can cause “allergic reaction, such as sneezing, a runny nose, red eyes and skin rash.
“Moulds can also cause asthma attacks.”
If condensation is already occurring, here’s what you can do:
For Internal Condensation (Inside the Home):
By implementing these strategies, you can effectively reduce condensation on windows and create a more comfortable and healthy indoor environment. However, it’s essential to assess your specific situation and needs to determine which combination of methods will be most effective in addressing condensation issues in your home.
At Window Fixers, we offer professional glass replacement services with a five-year guarantee on condensation-free double-glazed units. Our expert team can replace failed glass quickly and efficiently, restoring the insulation of your windows.
Send us a quick photo or video of your window via WhatsApp or Email, or give us a call to speak directly with one of our experts.
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