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With changes in the weather, you may have noticed water beading on the inside or outside of your windows. Inside condensation is caused by humidity in the home and is more frequent in winter months. Exterior condensation is caused by cooler temperatures inside the home and high heat and humidity outside. Excess moisture, in either case, is drawn to cooler surfaces. Window condensation is usually not a cause for concern, but there are some cases when this may indicate that it is time for a replacement.

Why Does Condensation Happen?

Interior condensation is caused by high humidity inside the home. This is usually more of an issue in the kitchen or bathroom. Everyday tasks like taking showers, doing the dishes, running a load of clothes through the washer, and boiling water can all cause humidity to rise. While most smaller areas like bathrooms have fans and vents to help reduce humidity, larger areas in the home frequently do not. This can cause moisture to be trapped inside and then condense on your windows.

Exterior window condensation can happen in warmer, summer months. This type of condensation happens most frequently when you run your air conditioning. The windows are cooled by the air temperature inside the home and the warm air on the outside when it hits the windows, causes water to collect.

An indication that your windows are not insulating as they should be.

What Does Window Condensation Mean?

If your windows are appearing wet, you may think that this is caused by faulty windows. This is usually not the case. New windows are more likely to show condensation than older ones because they are more airtight. Older windows are less efficient and when older windows leak air into the home, this can cause condensation to evaporate. New windows do not leak air and the condensation may be more apparent on them.

By identifying if the moisture is on the inside or the outside of the window, you can tell if your humidity inside is too high or if it is simply the case of outside moisture in the air. One way to tell if you have inside or outside condensation is to simply run a finger along the inside of the window where the water appears.

Condensation on the inside of the double glazing?

Double-paned windows are sealed with inert gas between the panes to make them more energy-efficient. Over time, the seal on the window can fail, the inert gas can start to leak out, and normal air can get in between the panes along with water vapor. While this fog may not be there all the time, it is

an indication that your windows are not insulating as they should be. This can cause higher energy bills that can get worse over time.


Should I Worry About Window Condensation?

Most of the time when condensation forms, it is not an indication that something is wrong. Once the air has time to circulate, or when the sun warms up the glass, it should disappear. You should however get your windows checked if you see rot, mould, or mildew around them or if you notice damp walls with stains, peeling wallpaper, or blistering paint. These are a few indications that the indoor air is too humid and needs to be addressed.


A Build-Up of Condensation: Due to temperature changes, certain houses may experience a buildup of condensation on chilly surfaces throughout the winter. Metal pipes, concrete surfaces, floor tiles, and even brick walls are examples of cold surfaces. If you find that condensation is a serious issue in your house, be sure to adequately air each area in order to eliminate the moisture. Otherwise, these condensation pockets are ideal breeding grounds for mold spores and also one of the causes of mould development.

Poor Ventilation in Your Home: As previously stated, a poorly ventilated home is also one of the causes of mold and the propagation of mold spores. The stagnant air in your house is one of the greatest conditions for mold growth. So make it a point to get rid of it on a daily basis! Humidity is generated in your house by steam from appliances, cooking, and bathing, leaving surfaces wet and sticky. Remove the moisture from your home, and you will eliminate the possibility of mould formation.

Wet and Damp Clothing: Consider this, you've just finished a load of laundry, removed it from the washer, and placed it aside to hang up later. But you forget, and the moist garment sits for at least a day. Mould may develop and spread in as little as 24 hours, believe it or not. Wet or damp garments lying about your house throughout the warm months of spring and summer can substantially be one of the causes of mould problems. So remember to do your laundry as soon as possible!


Without proper clean up mould can become airborne and spread throughout the building, So caution is needed at each stage of dealing with it.

Treatment of all surfaces, washing of clothes/bed lien/carpets, and other fabrics that have been exposed is very important.

Finding and Fixing the cause, this could be a water leak / bad airflow / faulty windows but until you investigate and find the cause you cannot fix it. And no matter how much you clean it will still come back.

Short-term fixes with mould do not tend to save you money and do not protect your health Please give us a call/email to set up an inspection of the problem. We work with local Housing Ass / Letting agents / Landlords / Homeowners / Tenants and Health care professionals 

The Brit M Company

Building Services 07467215475

Clean up/Treatment/Investigation