How to control crying windows

People are always wondering how to stop condensation forming on their windows. Check out our top 9 ideas to stop window condensation in your home.

We are often asked how to stop or reduce condensation forming on the inside of windows.

Often referred to as ‘crying windows’, condensation forms when warm moist air collects on a cold surface most commonly condensation on glass.

Will double glazing stop condensation on my windows – 2023 update

Find out how the latest technology in double glazing can stop condensation in your home – read more here.

Apart from moisture accumulating on the inside of glass, it can lead to the growth of black mould, corrosion of fittings and damage to woodwork and the paint finish on a window.

The longer it’s left unattended the more money will need to be spent to repair damage.

Added to that the health effects from mould can be quite harmful. The good news is that a number of simple things can be done to greatly reduce the chances of crying windows occurring.

Our top 9 tips to stop condensation on windows

Here are our top 9 things that can be easily done to make a difference to stop condensation on your windows:

1. Keep your pot plants outside. While it’s nice to have greenery inside plants “breathe” moisture out into the atmosphere and contribute to the humidity inside a building.

2. Dry your washing outside where possible. If you use a clothes dryer ensure that it is vented to the outside of the building. Wet washing inside a room or using a badly vented clothes dryer can contribute a lot of moisture to the air within a home.

3. Have good ventilation/extractor fans over showers and cooktop areas. Showers, boiling water and cooking are daily occurrences that all contribute moisture into homes/buildings. Good systems for ventilation and air extraction to the outside will greatly reduce the chances of humidity building up. One of the best and simplest systems invented is the opening window sash!

4. Open your windows and doors. Wow that’s a neat idea!! Functioning windows are extremely important as they assist in providing controlled ventilation in buildings.

5. If you use humidifiers turn them off when you don’t really need them. All they are doing is pumping water vapour into your home.

6. Monitor the temperature of your home/building. Try to keep the temperature consistent throughout.

7. Draught seal gaps in windows, doors, floors and walls to control the temperature of the building and home. Draught sealing windows will not only make opening and closing easier, save on heating and cooling bills, but also assist in keeping room temperatures more consistent and warmer during colder periods. This will reduce condensation on your windows.

8. Open drapes and curtains during sunny periods to allow air to circulate around the windows and dry out any moisture that may have built up.

9. Use fans and if required in ceiling heat/cooling transfer units to circulate and evenly distribute warm air around the home/building.

It’s as easy as that, a few simple but effective ways of controlling “crying windows”.

What if reducing moisture isn’t possible?

Reducing moisture in the air is a good idea, but isn’t always practical. 

In some cases it might be necessary to consider upgrading your windows to high-performance vacuum double glazing which we can actually fit nicely into your old wooden window frames.

This both preserves the character of your property but also provides dramatic improvements to energy efficiency.

Today, the glass has become so good that it can totally eliminate condensation from the inside of your windows. This is because of a vacuum layer between the glass. The space (or vacuum) in between the double glazing of Glavenir is so well-insulated from the cold night air, that it can easily stay warm and dry inside. 


This photo shows condensation on a pane of Glavenir after a cold night in Tasmania. The condensation was on the OUTSIDE of the glass, where the glass was cold, while the inside pane remained warm and perfectly dry. 

Learn more about vacuum insulated double glazing – by clicking here.

If you would like to talk to a timber window expert who understands all your options, and who will listen to your priorities, then please don’t hesitate to contact us.

Looking for double glazing for your sash windows or wooden windows?

Sealasash can double glaze your old timber, wooden and sash windows with new high-performance glass.  We also upgrade windows to include draught and acoustic seals that further improve the comfort and energy efficiency of your windows. 

Learn more about Sealasash:


Vacuum Insulated Double Glazing

Our ultra-high performance double glazing fits perfectly within your existing timber work, eliminating any bulky or expensive modifications.


Fix Those Annoying Rattles

With our draught and acoustic seals you’ll achieve amazing new comfort levels by reducing infiltration of outside air, noise and dust without the annoying rattles.

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Using traditional craftsmanship and modern materials, we’ll restore your windows and make them better than new.  This includes high-performance double glazing and draught seals that will dramatically improve the comfort and energy efficiency of old timber, wooden and sash windows.