How to demist double glazing
July 13, 2017
Misted up windows can be annoying. They’re normally associated with old single glazed windows or faulty double glazing. This is not always the case and it can often be easily solved. Let’s clear up the myths around condensation and find the solutions for demisting double glazed windows.
What is condensation?
Condensation is the process where water vapour turns into a liquid. Water vapour is produced daily by showering, cooking or drying clothes inside. Even breathing could cause condensation to form in smaller rooms. You can see it in windows that look misted or by a pooling of water around the frame. When it encounters a colder surface such as a window pane, condensation occurs. Sometimes this occurs on some windows and not others as it depends on their position.
Should double glazing ever get condensation?
The short answer to this is yes but not in all cases. You might assume any condensation is a sign of faulty windows but sometimes it’s the complete opposite. Condensation on the outside of windows mean they’re doing the job they’re meant to. The space in-between your double glazing prevents cold air being transferred to the inside pane. When air comes into contact with a colder surface, condensation forms. With high quality double glazing, heat can’t move between the glass. If the outside temperature is warmer than the window, condensation occurs.
If you have new double glazing and find condensation on the inside, don’t panic and think there’s something wrong. Condensation on the inside pane can be annoying as water can pool and cause mould if left too long. The blame can be put on faulty windows but it could actually be that they’re extremely efficient. If the temperature inside your home is higher or more humid than your windows this will cause your windows to mist up.
Older windows often have less condensation but this could be because they’re letting air pass through them. This might be ok in summer but during the winter this will leave you with a colder home and higher heating bills.
How to demist double glazing?
In most cases you don’t need to demist double glazing as it should clear by itself. Condensation on the outside should clear up with warmer temperatures during the day. Make sure you let plenty of air circulate if the condensation is inside to prevent damp and mould. If you have an extractor fan, use this when cooking and dry clothes outside when possible. Open windows to let air flow around, especially after showering.
When is condensation a problem?
If you have condensation in-between the panes of your double glazing whether it is your casement windows or patio doors, this could be an issue. This is normally caused by your window seals failing. The seals create an airtight and weatherproof environment. This stops changing temperatures affecting your windows and your home’s comfort levels. If they’re damaged or worn, moisture can collect inside which can cause further problems. It might just be the glass that needs replacing but be prepared that it could be the whole window unit.
What can I do about double glazing that’s failed?
If the seals on your windows have become damaged, you will probably need to have the windows replaced. Here at Jack of Glass, the clue’s in the name. We are experts in all things glass from double glazing to mirrors and splashbacks. Our windows are all tailor made and we can create any kind of thickness, colour or style that you prefer.
Our glass offers exceptionally high levels of insulation to keep your home at a comfortable temperature all year round. This also protects your home from the elements and unwanted noise. Get in touch if you want any more advice on demisting double glazing units or to discuss replacing your windows.